LeetCode Progress Report

Progress Chart

Detail

Done	ID	Title	Difficulty	Rust Solutions
✔	1	Two Sum	★	hash_map iterative
✔	2	Add Two Numbers	★★	zip
✔	3	Longest Substring Without Repeating Characters	★★	iterative position_map
	4	Median of Two Sorted Arrays	★★★
✔	5	Longest Palindromic Substring	★★	iterative
✔	6	Zigzag Conversion	★★	chunk cycle
✔	7	Reverse Integer	★★	math
✔	8	String to Integer (atoi)	★★	iterative
✔	9	Palindrome Number	★	iter_eq math
✔	10	Regular Expression Matching	★★★	dp
✔	11	Container With Most Water	★★	two_pointers
✔	12	Integer to Roman	★★	math
✔	13	Roman to Integer	★	windows
✔	14	Longest Common Prefix	★	take_while
✔	15	3Sum	★★	two_pointers
✔	16	3Sum Closest	★★	two_pointers
✔	17	Letter Combinations of a Phone Number	★★	fold
✔	18	4Sum	★★	convert_to_3sum
✔	19	Remove Nth Node From End of List	★★	caculate_idx
✔	20	Valid Parentheses	★	stack
✔	21	Merge Two Sorted Lists	★	zip
✔	22	Generate Parentheses	★★	dp
✔	23	Merge k Sorted Lists	★★★	heap merge_two_lists
✔	24	Swap Nodes in Pairs	★★	iterative
	25	Reverse Nodes in k-Group	★★★
✔	26	Remove Duplicates from Sorted Array	★	btree_cheating windows
✔	27	Remove Element	★	cheating swap
✔	28	Find the Index of the First Occurrence in a String	★	cheating kmp windows
✔	29	Divide Two Integers	★★	bit_manipulation
	30	Substring with Concatenation of All Words	★★★
✔	31	Next Permutation	★★	iterative
	32	Longest Valid Parentheses	★★★
✔	33	Search in Rotated Sorted Array	★★	binary_search binary_search_2
✔	34	Find First and Last Position of Element in Sorted Array	★★	binary_search binary_search_2
✔	35	Search Insert Position	★	binary_search binary_search_2
✔	36	Valid Sudoku	★★	set_with_idx_tuple
	37	Sudoku Solver	★★★
✔	38	Count and Say	★★	iterative
✔	39	Combination Sum	★★	backtracking
✔	40	Combination Sum II	★★	backtracking
✔	41	First Missing Positive	★★★	with_index
	42	Trapping Rain Water	★★★
✔	43	Multiply Strings	★★	fold
	44	Wildcard Matching	★★★
✔	45	Jump Game II	★★	bfs recursive
✔	46	Permutations	★★	backtracking next_permutation
✔	47	Permutations II	★★	next_permutation
✔	48	Rotate Image	★★	reverse_then_transpose
✔	49	Group Anagrams	★★	char_count sort
✔	50	Pow(x, n)	★★	half
	51	N-Queens	★★★
	52	N-Queens II	★★★
✔	53	Maximum Subarray	★★	dp
✔	54	Spiral Matrix	★★	split
✔	55	Jump Game	★★	greedy
✔	56	Merge Intervals	★★	greedy
✔	57	Insert Interval	★★	greedy
✔	58	Length of Last Word	★	rev_count split_whitespace
✔	59	Spiral Matrix II	★★	split
	60	Permutation Sequence	★★★
✔	61	Rotate List	★★	measure_length
✔	62	Unique Paths	★★	dp
✔	63	Unique Paths II	★★	dp
✔	64	Minimum Path Sum	★★	dp
	65	Valid Number	★★★
✔	66	Plus One	★	math
✔	67	Add Binary	★	math
✔	68	Text Justification	★★★	iterative
✔	69	Sqrt(x)	★	binary_search
✔	70	Climbing Stairs	★	dp
✔	71	Simplify Path	★★	stack
✔	72	Edit Distance	★★	dp
✔	73	Set Matrix Zeroes	★★	math
✔	74	Search a 2D Matrix	★★	binary_search
✔	75	Sort Colors	★★	double_swap
	76	Minimum Window Substring	★★★
✔	77	Combinations	★★	recursive
✔	78	Subsets	★★	recursive
✔	79	Word Search	★★	recursive
✔	80	Remove Duplicates from Sorted Array II	★★	windows
✔	81	Search in Rotated Sorted Array II	★★	binary_search
✔	82	Remove Duplicates from Sorted List II	★★	iterative
✔	83	Remove Duplicates from Sorted List	★	iterative
	84	Largest Rectangle in Histogram	★★★
	85	Maximal Rectangle	★★★
✔	86	Partition List	★★	iterative
	87	Scramble String	★★★
✔	88	Merge Sorted Array	★	fill_from_the_end
✔	89	Gray Code	★★	bit dp
✔	90	Subsets II	★★	recursive
✔	91	Decode Ways	★★	dp
✔	92	Reverse Linked List II	★★	iterative
✔	93	Restore IP Addresses	★★	backtracking1 backtracking2
✔	94	Binary Tree Inorder Traversal	★	recursive
✔	95	Unique Binary Search Trees II	★★	recursive
✔	96	Unique Binary Search Trees	★★	catalan_number recursive
✔	97	Interleaving String	★★	dp memoized_dp
✔	98	Validate Binary Search Tree	★★	recursive
	99	Recover Binary Search Tree	★★
✔	100	Same Tree	★	cheating recursive
✔	101	Symmetric Tree	★	recursive
✔	102	Binary Tree Level Order Traversal	★★	recursive
✔	103	Binary Tree Zigzag Level Order Traversal	★★	iterative
✔	104	Maximum Depth of Binary Tree	★	recursive
✔	105	Construct Binary Tree from Preorder and Inorder Traversal	★★	recursive
✔	106	Construct Binary Tree from Inorder and Postorder Traversal	★★	recursive
✔	107	Binary Tree Level Order Traversal II	★★	recursive
✔	108	Convert Sorted Array to Binary Search Tree	★	recursive
✔	109	Convert Sorted List to Binary Search Tree	★★	recursive
✔	110	Balanced Binary Tree	★	recursive
✔	111	Minimum Depth of Binary Tree	★	recursive
✔	112	Path Sum	★	recursive
✔	113	Path Sum II	★★	recursive
✔	114	Flatten Binary Tree to Linked List	★★	morris
	115	Distinct Subsequences	★★★
	116	Populating Next Right Pointers in Each Node	★★
	117	Populating Next Right Pointers in Each Node II	★★
✔	118	Pascal's Triangle	★	iterative
✔	119	Pascal's Triangle II	★	iterative
✔	120	Triangle	★★	dp1 dp2
✔	121	Best Time to Buy and Sell Stock	★	max
✔	122	Best Time to Buy and Sell Stock II	★★	dp fold
	123	Best Time to Buy and Sell Stock III	★★★
	124	Binary Tree Maximum Path Sum	★★★
✔	125	Valid Palindrome	★	next_back rev
	126	Word Ladder II	★★★
	127	Word Ladder	★★★
✔	128	Longest Consecutive Sequence	★★	hash_set heap
✔	129	Sum Root to Leaf Numbers	★★	recursive
	130	Surrounded Regions	★★
✔	131	Palindrome Partitioning	★★	recursive
✔	132	Palindrome Partitioning II	★★★	dp
	133	Clone Graph	★★
	134	Gas Station	★★
	135	Candy	★★★
✔	136	Single Number	★	xor
	137	Single Number II	★★
	138	Copy List with Random Pointer	★★
✔	139	Word Break	★★	dp memoized_dp
	140	Word Break II	★★★
	141	Linked List Cycle	★
	142	Linked List Cycle II	★★
✔	143	Reorder List	★★	deque
✔	144	Binary Tree Preorder Traversal	★	recursive
✔	145	Binary Tree Postorder Traversal	★	recursive
	146	LRU Cache	★★
	147	Insertion Sort List	★★
	148	Sort List	★★
	149	Max Points on a Line	★★★
✔	150	Evaluate Reverse Polish Notation	★★	stack
✔	151	Reverse Words in a String	★★	split
✔	152	Maximum Product Subarray	★★	dp
✔	153	Find Minimum in Rotated Sorted Array	★★	binary_search binary_search_2
✔	154	Find Minimum in Rotated Sorted Array II	★★★	binary_search binary_search_2
✔	155	Min Stack	★★	min_stack
	160	Intersection of Two Linked Lists	★
✔	162	Find Peak Element	★★	binary_search heap
✔	164	Maximum Gap	★★	bucket_sort comparison_sort
✔	165	Compare Version Numbers	★★	iterative
✔	166	Fraction to Recurring Decimal	★★	hash_map
✔	167	Two Sum II - Input Array Is Sorted	★★	binary_search hash_map two_pointer
✔	168	Excel Sheet Column Title	★	recursive
✔	169	Majority Element	★	boyer_moore_majority_vote hash_map
✔	171	Excel Sheet Column Number	★	iterative
	172	Factorial Trailing Zeroes	★★
✔	173	Binary Search Tree Iterator	★★	morris
	174	Dungeon Game	★★★
✔	179	Largest Number	★★	sort
	187	Repeated DNA Sequences	★★
	188	Best Time to Buy and Sell Stock IV	★★★
✔	189	Rotate Array	★★	reverse splice std
✔	190	Reverse Bits	★	iterative std
✔	191	Number of 1 Bits	★	iterative std
✔	198	House Robber	★★	dp
✔	199	Binary Tree Right Side View	★★	recursive
	200	Number of Islands	★★
✔	201	Bitwise AND of Numbers Range	★★	bit_manipulation
✔	202	Happy Number	★	hash_set
✔	203	Remove Linked List Elements	★	iterative
	204	Count Primes	★★
✔	205	Isomorphic Strings	★	hash_map
✔	206	Reverse Linked List	★	iterative
✔	207	Course Schedule	★★	recursive
✔	208	Implement Trie (Prefix Tree)	★★	trie
✔	209	Minimum Size Subarray Sum	★★	iterative queue
✔	210	Course Schedule II	★★	recursive
✔	211	Design Add and Search Words Data Structure	★★	hash_set trie
	212	Word Search II	★★★
✔	213	House Robber II	★★	dp
	214	Shortest Palindrome	★★★
	215	Kth Largest Element in an Array	★★
✔	216	Combination Sum III	★★	recursive
✔	217	Contains Duplicate	★	hash_set
	218	The Skyline Problem	★★★
✔	219	Contains Duplicate II	★	hash_map
	220	Contains Duplicate III	★★★
	221	Maximal Square	★★
	222	Count Complete Tree Nodes	★
	223	Rectangle Area	★★
	224	Basic Calculator	★★★
✔	225	Implement Stack using Queues	★	queue
✔	226	Invert Binary Tree	★	recursive
✔	227	Basic Calculator II	★★	stack
✔	228	Summary Ranges	★	iterative
	229	Majority Element II	★★
✔	230	Kth Smallest Element in a BST	★★	iterative recursive
✔	231	Power of Two	★	bit_and bit_count
✔	232	Implement Queue using Stacks	★	double_stacks
	233	Number of Digit One	★★★
✔	234	Palindrome Linked List	★	iterative reverse_nodes
✔	235	Lowest Common Ancestor of a Binary Search Tree	★★	iterative
	236	Lowest Common Ancestor of a Binary Tree	★★
	237	Delete Node in a Linked List	★★
	238	Product of Array Except Self	★★
	239	Sliding Window Maximum	★★★
✔	240	Search a 2D Matrix II	★★	iterative recursive
	241	Different Ways to Add Parentheses	★★
✔	242	Valid Anagram	★	iterative
✔	257	Binary Tree Paths	★	recursive
✔	258	Add Digits	★	formula iterative
✔	260	Single Number III	★★	xor_partition
✔	263	Ugly Number	★	iterative
✔	264	Ugly Number II	★★	dp
✔	268	Missing Number	★	sort sum
	273	Integer to English Words	★★★
✔	274	H-Index	★★	sort
✔	275	H-Index II	★★	iterative
✔	278	First Bad Version	★	binary_search
	279	Perfect Squares	★★
	282	Expression Add Operators	★★★
✔	283	Move Zeroes	★	iterative
	284	Peeking Iterator	★★
	287	Find the Duplicate Number	★★
	289	Game of Life	★★
✔	290	Word Pattern	★	hash_map
	292	Nim Game	★
	295	Find Median from Data Stream	★★★
	297	Serialize and Deserialize Binary Tree	★★★
✔	299	Bulls and Cows	★★	iterative
	300	Longest Increasing Subsequence	★★
	301	Remove Invalid Parentheses	★★★
✔	303	Range Sum Query - Immutable	★	cumulative_sum
✔	304	Range Sum Query 2D - Immutable	★★	cumulative_sum
	306	Additive Number	★★
✔	307	Range Sum Query - Mutable	★★	binary_indexed_tree
	309	Best Time to Buy and Sell Stock with Cooldown	★★
	310	Minimum Height Trees	★★
	312	Burst Balloons	★★★
	313	Super Ugly Number	★★
	315	Count of Smaller Numbers After Self	★★★
✔	316	Remove Duplicate Letters	★★	stack
	318	Maximum Product of Word Lengths	★★
	319	Bulb Switcher	★★
	321	Create Maximum Number	★★★
✔	322	Coin Change	★★	dp recursive
	324	Wiggle Sort II	★★
✔	326	Power of Three	★	math
	327	Count of Range Sum	★★★
✔	328	Odd Even Linked List	★★	iterative
	329	Longest Increasing Path in a Matrix	★★★
	330	Patching Array	★★★
✔	331	Verify Preorder Serialization of a Binary Tree	★★	slot
	332	Reconstruct Itinerary	★★★
	334	Increasing Triplet Subsequence	★★
	335	Self Crossing	★★★
	336	Palindrome Pairs	★★★
	337	House Robber III	★★
✔	338	Counting Bits	★	dp1 dp2
✔	341	Flatten Nested List Iterator	★★	stack
✔	342	Power of Four	★	bit_manipulation
✔	343	Integer Break	★★	math
✔	344	Reverse String	★	swap
✔	345	Reverse Vowels of a String	★	swap
	347	Top K Frequent Elements	★★
✔	349	Intersection of Two Arrays	★	hash_set std
	350	Intersection of Two Arrays II	★
	352	Data Stream as Disjoint Intervals	★★★
	354	Russian Doll Envelopes	★★★
✔	355	Design Twitter	★★	iterative
	357	Count Numbers with Unique Digits	★★
	363	Max Sum of Rectangle No Larger Than K	★★★
	365	Water and Jug Problem	★★
✔	367	Valid Perfect Square	★	binary_search
	368	Largest Divisible Subset	★★
	371	Sum of Two Integers	★★
	372	Super Pow	★★
	373	Find K Pairs with Smallest Sums	★★
✔	374	Guess Number Higher or Lower	★	binary_search
	375	Guess Number Higher or Lower II	★★
	376	Wiggle Subsequence	★★
	377	Combination Sum IV	★★
	378	Kth Smallest Element in a Sorted Matrix	★★
	380	Insert Delete GetRandom O(1)	★★
	381	Insert Delete GetRandom O(1) - Duplicates allowed	★★★
	382	Linked List Random Node	★★
✔	383	Ransom Note	★	letters_count
	384	Shuffle an Array	★★
	385	Mini Parser	★★
✔	386	Lexicographical Numbers	★★	recursive
✔	387	First Unique Character in a String	★	mark
	388	Longest Absolute File Path	★★
✔	389	Find the Difference	★	xor
✔	390	Elimination Game	★★	math
	391	Perfect Rectangle	★★★
✔	392	Is Subsequence	★	iterative
✔	393	UTF-8 Validation	★★	iterative
✔	394	Decode String	★★	stack
	395	Longest Substring with At Least K Repeating Characters	★★
✔	396	Rotate Function	★★	iterative
✔	397	Integer Replacement	★★	dp
✔	398	Random Pick Index	★★	iterative rng
	399	Evaluate Division	★★
✔	400	Nth Digit	★★	math
	401	Binary Watch	★
	402	Remove K Digits	★★
	403	Frog Jump	★★★
✔	404	Sum of Left Leaves	★	recursive
✔	405	Convert a Number to Hexadecimal	★	iterative
	406	Queue Reconstruction by Height	★★
	407	Trapping Rain Water II	★★★
✔	409	Longest Palindrome	★	iterative
	410	Split Array Largest Sum	★★★
✔	412	Fizz Buzz	★	iterative
✔	413	Arithmetic Slices	★★	iterative
	414	Third Maximum Number	★
✔	415	Add Strings	★	iterative
✔	416	Partition Equal Subset Sum	★★	recursive
	417	Pacific Atlantic Water Flow	★★
	419	Battleships in a Board	★★
	420	Strong Password Checker	★★★
	421	Maximum XOR of Two Numbers in an Array	★★
✔	423	Reconstruct Original Digits from English	★★	solve_equations
	424	Longest Repeating Character Replacement	★★
	427	Construct Quad Tree	★★
	429	N-ary Tree Level Order Traversal	★★
	430	Flatten a Multilevel Doubly Linked List	★★
	432	All O`one Data Structure	★★★
	433	Minimum Genetic Mutation	★★
✔	434	Number of Segments in a String	★	split
	435	Non-overlapping Intervals	★★
	436	Find Right Interval	★★
✔	437	Path Sum III	★★	recursive
✔	438	Find All Anagrams in a String	★★	windows windows_2
	440	K-th Smallest in Lexicographical Order	★★★
✔	441	Arranging Coins	★	binary_search iterative math
✔	442	Find All Duplicates in an Array	★★	cyclic_sort
✔	443	String Compression	★★	iterative
	445	Add Two Numbers II	★★
	446	Arithmetic Slices II - Subsequence	★★★
	447	Number of Boomerangs	★★
✔	448	Find All Numbers Disappeared in an Array	★	mark sort
	449	Serialize and Deserialize BST	★★
	450	Delete Node in a BST	★★
✔	451	Sort Characters By Frequency	★★	sort_counts
	452	Minimum Number of Arrows to Burst Balloons	★★
✔	453	Minimum Moves to Equal Array Elements	★★	math
	454	4Sum II	★★
✔	455	Assign Cookies	★	greedy
	456	132 Pattern	★★
	457	Circular Array Loop	★★
	458	Poor Pigs	★★★
	459	Repeated Substring Pattern	★
	460	LFU Cache	★★★
✔	461	Hamming Distance	★	xor
✔	462	Minimum Moves to Equal Array Elements II	★★	math
	463	Island Perimeter	★
	464	Can I Win	★★
	466	Count The Repetitions	★★★
	467	Unique Substrings in Wraparound String	★★
✔	468	Validate IP Address	★★	parse
	470	Implement Rand10() Using Rand7()	★★
	472	Concatenated Words	★★★
	473	Matchsticks to Square	★★
	474	Ones and Zeroes	★★
	475	Heaters	★★
✔	476	Number Complement	★	bit_manipulation bit_manipulation_2 bit_manipulation_3
	477	Total Hamming Distance	★★
	478	Generate Random Point in a Circle	★★
	479	Largest Palindrome Product	★★★
	480	Sliding Window Median	★★★
✔	481	Magical String	★★	queue
✔	482	License Key Formatting	★	iterative
	483	Smallest Good Base	★★★
✔	485	Max Consecutive Ones	★	iterative split
	486	Predict the Winner	★★
	488	Zuma Game	★★★
	491	Non-decreasing Subsequences	★★
	492	Construct the Rectangle	★
	493	Reverse Pairs	★★★
	494	Target Sum	★★
✔	495	Teemo Attacking	★	iterative
✔	496	Next Greater Element I	★	stack
	497	Random Point in Non-overlapping Rectangles	★★
✔	498	Diagonal Traverse	★★	iterative
✔	500	Keyboard Row	★	iterative
	501	Find Mode in Binary Search Tree	★
✔	502	IPO	★★★	greedy
✔	503	Next Greater Element II	★★	find stack
✔	504	Base 7	★	math
	506	Relative Ranks	★
✔	507	Perfect Number	★	iterative
	508	Most Frequent Subtree Sum	★★
✔	509	Fibonacci Number	★	dp
✔	513	Find Bottom Left Tree Value	★★	recursive
	514	Freedom Trail	★★★
✔	515	Find Largest Value in Each Tree Row	★★	recursive
	516	Longest Palindromic Subsequence	★★
	517	Super Washing Machines	★★★
	518	Coin Change II	★★
	519	Random Flip Matrix	★★
✔	520	Detect Capital	★	iterative pattern_matching
	521	Longest Uncommon Subsequence I	★
	522	Longest Uncommon Subsequence II	★★
✔	523	Continuous Subarray Sum	★★	prefix_mod
	524	Longest Word in Dictionary through Deleting	★★
✔	525	Contiguous Array	★★	iterative
	526	Beautiful Arrangement	★★
	528	Random Pick with Weight	★★
	529	Minesweeper	★★
✔	530	Minimum Absolute Difference in BST	★	recursive
✔	532	K-diff Pairs in an Array	★★	hash_map
	535	Encode and Decode TinyURL	★★
✔	537	Complex Number Multiplication	★★	parsing
✔	538	Convert BST to Greater Tree	★★	recursive
✔	539	Minimum Time Difference	★★	iterative
✔	540	Single Element in a Sorted Array	★★	binary_search
✔	541	Reverse String II	★	chunks
	542	01 Matrix	★★
	543	Diameter of Binary Tree	★
	546	Remove Boxes	★★★
✔	547	Number of Provinces	★★	dfs
✔	551	Student Attendance Record I	★	iterative
	552	Student Attendance Record II	★★★
	553	Optimal Division	★★
	554	Brick Wall	★★
✔	556	Next Greater Element III	★★	next_permutation
✔	557	Reverse Words in a String III	★	iterative
	558	Logical OR of Two Binary Grids Represented as Quad-Trees	★★
	559	Maximum Depth of N-ary Tree	★
✔	560	Subarray Sum Equals K	★★	prefix_sum
✔	561	Array Partition	★	sort
	563	Binary Tree Tilt	★
	564	Find the Closest Palindrome	★★★
	565	Array Nesting	★★
	566	Reshape the Matrix	★
✔	567	Permutation in String	★★	map_and_deque
	572	Subtree of Another Tree	★
	575	Distribute Candies	★
	576	Out of Boundary Paths	★★
✔	581	Shortest Unsorted Continuous Subarray	★★	iterative sort
	583	Delete Operation for Two Strings	★★
	587	Erect the Fence	★★★
	589	N-ary Tree Preorder Traversal	★
	590	N-ary Tree Postorder Traversal	★
	591	Tag Validator	★★★
	592	Fraction Addition and Subtraction	★★
	593	Valid Square	★★
✔	594	Longest Harmonious Subsequence	★	iterative
✔	598	Range Addition II	★	iterative
✔	599	Minimum Index Sum of Two Lists	★	hash_map
	600	Non-negative Integers without Consecutive Ones	★★★
✔	605	Can Place Flowers	★	iterative
✔	606	Construct String from Binary Tree	★★	recursive
	609	Find Duplicate File in System	★★
	611	Valid Triangle Number	★★
	617	Merge Two Binary Trees	★
	621	Task Scheduler	★★
	622	Design Circular Queue	★★
✔	623	Add One Row to Tree	★★	recursive
	624	Maximum Distance in Arrays	★★
✔	628	Maximum Product of Three Numbers	★	sort
	629	K Inverse Pairs Array	★★★
	630	Course Schedule III	★★★
	632	Smallest Range Covering Elements from K Lists	★★★
	633	Sum of Square Numbers	★★
	636	Exclusive Time of Functions	★★
✔	637	Average of Levels in Binary Tree	★	bfs
	638	Shopping Offers	★★
	639	Decode Ways II	★★★
✔	640	Solve the Equation	★★	iterative
	641	Design Circular Deque	★★
✔	643	Maximum Average Subarray I	★	windows
✔	645	Set Mismatch	★	cyclic_sort
✔	646	Maximum Length of Pair Chain	★★	greedy
✔	647	Palindromic Substrings	★★	iterative windows
✔	648	Replace Words	★★	trie
	649	Dota2 Senate	★★
✔	650	2 Keys Keyboard	★★	recursive
	652	Find Duplicate Subtrees	★★
✔	653	Two Sum IV - Input is a BST	★	iterative recursive
✔	654	Maximum Binary Tree	★★	iterative recursive
	655	Print Binary Tree	★★
✔	657	Robot Return to Origin	★	iterative
	658	Find K Closest Elements	★★
	659	Split Array into Consecutive Subsequences	★★
	661	Image Smoother	★
	662	Maximum Width of Binary Tree	★★
	664	Strange Printer	★★★
✔	665	Non-decreasing Array	★★	iterative
	667	Beautiful Arrangement II	★★
	668	Kth Smallest Number in Multiplication Table	★★★
	669	Trim a Binary Search Tree	★★
✔	670	Maximum Swap	★★	iterative
	671	Second Minimum Node In a Binary Tree	★
	672	Bulb Switcher II	★★
✔	673	Number of Longest Increasing Subsequence	★★	dp
✔	674	Longest Continuous Increasing Subsequence	★	iterative
	675	Cut Off Trees for Golf Event	★★★
	676	Implement Magic Dictionary	★★
✔	677	Map Sum Pairs	★★	trie
	678	Valid Parenthesis String	★★
	679	24 Game	★★★
	680	Valid Palindrome II	★
✔	682	Baseball Game	★	stack
	684	Redundant Connection	★★
	685	Redundant Connection II	★★★
	686	Repeated String Match	★★
	687	Longest Univalue Path	★★
	688	Knight Probability in Chessboard	★★
	689	Maximum Sum of 3 Non-Overlapping Subarrays	★★★
	690	Employee Importance	★★
	691	Stickers to Spell Word	★★★
	692	Top K Frequent Words	★★
✔	693	Binary Number with Alternating Bits	★	bit_manipulation
	695	Max Area of Island	★★
	696	Count Binary Substrings	★
✔	697	Degree of an Array	★	hash_map
	698	Partition to K Equal Sum Subsets	★★
	699	Falling Squares	★★★
✔	700	Search in a Binary Search Tree	★	recursive
	701	Insert into a Binary Search Tree	★★
	703	Kth Largest Element in a Stream	★
✔	704	Binary Search	★	binary_search
	705	Design HashSet	★
	706	Design HashMap	★
	707	Design Linked List	★★
✔	709	To Lower Case	★	cheating iterative
	710	Random Pick with Blacklist	★★★
	712	Minimum ASCII Delete Sum for Two Strings	★★
✔	713	Subarray Product Less Than K	★★	queue sliding_window
	714	Best Time to Buy and Sell Stock with Transaction Fee	★★
	715	Range Module	★★★
✔	717	1-bit and 2-bit Characters	★	iterative
	718	Maximum Length of Repeated Subarray	★★
	719	Find K-th Smallest Pair Distance	★★★
✔	720	Longest Word in Dictionary	★★	sort_and_hash_set
	721	Accounts Merge	★★
	722	Remove Comments	★★
✔	724	Find Pivot Index	★	iterative
✔	725	Split Linked List in Parts	★★	iterative
	726	Number of Atoms	★★★
✔	728	Self Dividing Numbers	★	iterative
	729	My Calendar I	★★
	730	Count Different Palindromic Subsequences	★★★
	731	My Calendar II	★★
	732	My Calendar III	★★★
	733	Flood Fill	★
	735	Asteroid Collision	★★
	736	Parse Lisp Expression	★★★
✔	738	Monotone Increasing Digits	★★	math
✔	739	Daily Temperatures	★★	dp
	740	Delete and Earn	★★
	741	Cherry Pickup	★★★
	743	Network Delay Time	★★
✔	744	Find Smallest Letter Greater Than Target	★	binary_search
	745	Prefix and Suffix Search	★★★
	746	Min Cost Climbing Stairs	★
	747	Largest Number At Least Twice of Others	★
✔	748	Shortest Completing Word	★	iterative
	749	Contain Virus	★★★
	752	Open the Lock	★★
	753	Cracking the Safe	★★★
	754	Reach a Number	★★
	756	Pyramid Transition Matrix	★★
	757	Set Intersection Size At Least Two	★★★
	761	Special Binary String	★★★
	762	Prime Number of Set Bits in Binary Representation	★
✔	763	Partition Labels	★★	merge_intervals
	764	Largest Plus Sign	★★
	765	Couples Holding Hands	★★★
	766	Toeplitz Matrix	★
	767	Reorganize String	★★
	768	Max Chunks To Make Sorted II	★★★
✔	769	Max Chunks To Make Sorted	★★	iterative
	770	Basic Calculator IV	★★★
✔	771	Jewels and Stones	★	iterative
	773	Sliding Puzzle	★★★
	775	Global and Local Inversions	★★
	777	Swap Adjacent in LR String	★★
	778	Swim in Rising Water	★★★
✔	779	K-th Symbol in Grammar	★★	recursive
	780	Reaching Points	★★★
	781	Rabbits in Forest	★★
	782	Transform to Chessboard	★★★
	783	Minimum Distance Between BST Nodes	★
✔	784	Letter Case Permutation	★★	iterative
	785	Is Graph Bipartite?	★★
	786	K-th Smallest Prime Fraction	★★
	787	Cheapest Flights Within K Stops	★★
	788	Rotated Digits	★★
	789	Escape The Ghosts	★★
	790	Domino and Tromino Tiling	★★
✔	791	Custom Sort String	★★	sort_by
	792	Number of Matching Subsequences	★★
	793	Preimage Size of Factorial Zeroes Function	★★★
	794	Valid Tic-Tac-Toe State	★★
✔	795	Number of Subarrays with Bounded Maximum	★★	iterative
	796	Rotate String	★
	797	All Paths From Source to Target	★★
	798	Smallest Rotation with Highest Score	★★★
	799	Champagne Tower	★★
	801	Minimum Swaps To Make Sequences Increasing	★★★
	802	Find Eventual Safe States	★★
	803	Bricks Falling When Hit	★★★
✔	804	Unique Morse Code Words	★	hash_set
	805	Split Array With Same Average	★★★
✔	806	Number of Lines To Write String	★	iterative
	807	Max Increase to Keep City Skyline	★★
	808	Soup Servings	★★
✔	809	Expressive Words	★★	iterative
	810	Chalkboard XOR Game	★★★
✔	811	Subdomain Visit Count	★★	hash_map
	812	Largest Triangle Area	★
	813	Largest Sum of Averages	★★
✔	814	Binary Tree Pruning	★★	recursive
	815	Bus Routes	★★★
	816	Ambiguous Coordinates	★★
✔	817	Linked List Components	★★	iterative
	818	Race Car	★★★
✔	819	Most Common Word	★	hash_map
	820	Short Encoding of Words	★★
✔	821	Shortest Distance to a Character	★	iterative
	822	Card Flipping Game	★★
	823	Binary Trees With Factors	★★
	824	Goat Latin	★
✔	825	Friends Of Appropriate Ages	★★	iterative
✔	826	Most Profit Assigning Work	★★	iterative
	827	Making A Large Island	★★★
	828	Count Unique Characters of All Substrings of a Given String	★★★
	829	Consecutive Numbers Sum	★★★
✔	830	Positions of Large Groups	★	iterative
✔	831	Masking Personal Information	★★	iterative
	832	Flipping an Image	★
✔	833	Find And Replace in String	★★	iterative
	834	Sum of Distances in Tree	★★★
	835	Image Overlap	★★
	836	Rectangle Overlap	★
	837	New 21 Game	★★
	838	Push Dominoes	★★
	839	Similar String Groups	★★★
	840	Magic Squares In Grid	★★
✔	841	Keys and Rooms	★★	recursive
	842	Split Array into Fibonacci Sequence	★★
	843	Guess the Word	★★★
✔	844	Backspace String Compare	★	stack
✔	845	Longest Mountain in Array	★★	iterative
✔	846	Hand of Straights	★★	iterative
	847	Shortest Path Visiting All Nodes	★★★
	848	Shifting Letters	★★
	849	Maximize Distance to Closest Person	★★
	850	Rectangle Area II	★★★
✔	851	Loud and Rich	★★	dfs
	852	Peak Index in a Mountain Array	★★
	853	Car Fleet	★★
	854	K-Similar Strings	★★★
	855	Exam Room	★★
✔	856	Score of Parentheses	★★	stack
	857	Minimum Cost to Hire K Workers	★★★
	858	Mirror Reflection	★★
✔	859	Buddy Strings	★	iterative
	860	Lemonade Change	★
	861	Score After Flipping Matrix	★★
	862	Shortest Subarray with Sum at Least K	★★★
	863	All Nodes Distance K in Binary Tree	★★
	864	Shortest Path to Get All Keys	★★★
	865	Smallest Subtree with all the Deepest Nodes	★★
	866	Prime Palindrome	★★
	867	Transpose Matrix	★
✔	868	Binary Gap	★	iterative
✔	869	Reordered Power of 2	★★	math
✔	870	Advantage Shuffle	★★	greedy
	871	Minimum Number of Refueling Stops	★★★
✔	872	Leaf-Similar Trees	★	recursive
	873	Length of Longest Fibonacci Subsequence	★★
	874	Walking Robot Simulation	★★
	875	Koko Eating Bananas	★★
✔	876	Middle of the Linked List	★	iterative
	877	Stone Game	★★
	878	Nth Magical Number	★★★
	879	Profitable Schemes	★★★
	880	Decoded String at Index	★★
✔	881	Boats to Save People	★★	full two_pointer
	882	Reachable Nodes In Subdivided Graph	★★★
	883	Projection Area of 3D Shapes	★
✔	884	Uncommon Words from Two Sentences	★	hash_map
	885	Spiral Matrix III	★★
	886	Possible Bipartition	★★
	887	Super Egg Drop	★★★
	888	Fair Candy Swap	★
✔	889	Construct Binary Tree from Preorder and Postorder Traversal	★★	recursive
✔	890	Find and Replace Pattern	★★	iterative
	891	Sum of Subsequence Widths	★★★
	892	Surface Area of 3D Shapes	★
	893	Groups of Special-Equivalent Strings	★★
	894	All Possible Full Binary Trees	★★
✔	895	Maximum Frequency Stack	★★★	heap
	896	Monotonic Array	★
	897	Increasing Order Search Tree	★
	898	Bitwise ORs of Subarrays	★★
	899	Orderly Queue	★★★
✔	900	RLE Iterator	★★	iterative
	901	Online Stock Span	★★
	902	Numbers At Most N Given Digit Set	★★★
	903	Valid Permutations for DI Sequence	★★★
	904	Fruit Into Baskets	★★
	905	Sort Array By Parity	★
	906	Super Palindromes	★★★
	907	Sum of Subarray Minimums	★★
	908	Smallest Range I	★
	909	Snakes and Ladders	★★
	910	Smallest Range II	★★
	911	Online Election	★★
	912	Sort an Array	★★
	913	Cat and Mouse	★★★
	914	X of a Kind in a Deck of Cards	★
✔	915	Partition Array into Disjoint Intervals	★★	iterative
✔	916	Word Subsets	★★	iterative
✔	917	Reverse Only Letters	★	swap
	918	Maximum Sum Circular Subarray	★★
✔	919	Complete Binary Tree Inserter	★★	queue
	920	Number of Music Playlists	★★★
✔	921	Minimum Add to Make Parentheses Valid	★★	stack
	922	Sort Array By Parity II	★
	923	3Sum With Multiplicity	★★
	924	Minimize Malware Spread	★★★
✔	925	Long Pressed Name	★	iterative
	926	Flip String to Monotone Increasing	★★
	927	Three Equal Parts	★★★
	928	Minimize Malware Spread II	★★★
✔	929	Unique Email Addresses	★	iterative
✔	930	Binary Subarrays With Sum	★★	prefix_sum
✔	931	Minimum Falling Path Sum	★★	dp
✔	932	Beautiful Array	★★	iterative
	933	Number of Recent Calls	★
	934	Shortest Bridge	★★
	935	Knight Dialer	★★
	936	Stamping The Sequence	★★★
✔	937	Reorder Data in Log Files	★★	sort
✔	938	Range Sum of BST	★	recursive
	939	Minimum Area Rectangle	★★
	940	Distinct Subsequences II	★★★
	941	Valid Mountain Array	★
	942	DI String Match	★
	943	Find the Shortest Superstring	★★★
✔	944	Delete Columns to Make Sorted	★	iterative
✔	945	Minimum Increment to Make Array Unique	★★	sort
✔	946	Validate Stack Sequences	★★	stack
✔	947	Most Stones Removed with Same Row or Column	★★	hash_map
✔	948	Bag of Tokens	★★	two_pointer
	949	Largest Time for Given Digits	★★
✔	950	Reveal Cards In Increasing Order	★★	deque
✔	951	Flip Equivalent Binary Trees	★★	recursive
	952	Largest Component Size by Common Factor	★★★
	953	Verifying an Alien Dictionary	★
	954	Array of Doubled Pairs	★★
	955	Delete Columns to Make Sorted II	★★
	956	Tallest Billboard	★★★
	957	Prison Cells After N Days	★★
✔	958	Check Completeness of a Binary Tree	★★	bfs
	959	Regions Cut By Slashes	★★
	960	Delete Columns to Make Sorted III	★★★
✔	961	N-Repeated Element in Size 2N Array	★	hash_set
	962	Maximum Width Ramp	★★
	963	Minimum Area Rectangle II	★★
	964	Least Operators to Express Number	★★★
✔	965	Univalued Binary Tree	★	iterative
	966	Vowel Spellchecker	★★
✔	967	Numbers With Same Consecutive Differences	★★	iterative
	968	Binary Tree Cameras	★★★
✔	969	Pancake Sorting	★★	iterative
	970	Powerful Integers	★★
✔	971	Flip Binary Tree To Match Preorder Traversal	★★	iterative
	972	Equal Rational Numbers	★★★
✔	973	K Closest Points to Origin	★★	select
✔	974	Subarray Sums Divisible by K	★★	iterative
	975	Odd Even Jump	★★★
	976	Largest Perimeter Triangle	★
✔	977	Squares of a Sorted Array	★	two_pointer
	978	Longest Turbulent Subarray	★★
	979	Distribute Coins in Binary Tree	★★
	980	Unique Paths III	★★★
✔	981	Time Based Key-Value Store	★★	binary_search
	982	Triples with Bitwise AND Equal To Zero	★★★
	983	Minimum Cost For Tickets	★★
✔	984	String Without AAA or BBB	★★	greedy
✔	985	Sum of Even Numbers After Queries	★★	iterative
✔	986	Interval List Intersections	★★	iterative
	987	Vertical Order Traversal of a Binary Tree	★★★
✔	988	Smallest String Starting From Leaf	★★	recursive
✔	989	Add to Array-Form of Integer	★	iterative
	990	Satisfiability of Equality Equations	★★
	991	Broken Calculator	★★
	992	Subarrays with K Different Integers	★★★
	993	Cousins in Binary Tree	★
✔	994	Rotting Oranges	★★	iterative
	995	Minimum Number of K Consecutive Bit Flips	★★★
	996	Number of Squareful Arrays	★★★
✔	997	Find the Town Judge	★	iterative
	998	Maximum Binary Tree II	★★
	999	Available Captures for Rook	★
	1000	Minimum Cost to Merge Stones	★★★
	1001	Grid Illumination	★★★
✔	1002	Find Common Characters	★	iterative
	1003	Check If Word Is Valid After Substitutions	★★
	1004	Max Consecutive Ones III	★★
	1005	Maximize Sum Of Array After K Negations	★
✔	1006	Clumsy Factorial	★★	iterative
	1007	Minimum Domino Rotations For Equal Row	★★
✔	1008	Construct Binary Search Tree from Preorder Traversal	★★	recursive
✔	1009	Complement of Base 10 Integer	★	bit_manipulation
✔	1010	Pairs of Songs With Total Durations Divisible by 60	★★	modular
	1011	Capacity To Ship Packages Within D Days	★★
	1012	Numbers With Repeated Digits	★★★
	1013	Partition Array Into Three Parts With Equal Sum	★
	1014	Best Sightseeing Pair	★★
	1015	Smallest Integer Divisible by K	★★
	1016	Binary String With Substrings Representing 1 To N	★★
	1017	Convert to Base -2	★★
✔	1018	Binary Prefix Divisible By 5	★	modular
	1019	Next Greater Node In Linked List	★★
	1020	Number of Enclaves	★★
	1021	Remove Outermost Parentheses	★
✔	1022	Sum of Root To Leaf Binary Numbers	★	recursive
✔	1023	Camelcase Matching	★★	iterative
	1024	Video Stitching	★★
	1025	Divisor Game	★
	1026	Maximum Difference Between Node and Ancestor	★★
	1027	Longest Arithmetic Subsequence	★★
	1028	Recover a Tree From Preorder Traversal	★★★
	1029	Two City Scheduling	★★
	1030	Matrix Cells in Distance Order	★
	1031	Maximum Sum of Two Non-Overlapping Subarrays	★★
	1032	Stream of Characters	★★★
	1033	Moving Stones Until Consecutive	★★
	1034	Coloring A Border	★★
	1035	Uncrossed Lines	★★
	1036	Escape a Large Maze	★★★
✔	1037	Valid Boomerang	★	math
✔	1038	Binary Search Tree to Greater Sum Tree	★★	recursive
	1039	Minimum Score Triangulation of Polygon	★★
	1040	Moving Stones Until Consecutive II	★★
	1041	Robot Bounded In Circle	★★
	1042	Flower Planting With No Adjacent	★★
✔	1043	Partition Array for Maximum Sum	★★	dp
	1044	Longest Duplicate Substring	★★★
✔	1046	Last Stone Weight	★	heap
	1047	Remove All Adjacent Duplicates In String	★
	1048	Longest String Chain	★★
	1049	Last Stone Weight II	★★
✔	1051	Height Checker	★	counting_sort
	1052	Grumpy Bookstore Owner	★★
	1053	Previous Permutation With One Swap	★★
✔	1054	Distant Barcodes	★★	chunk
✔	1061	Lexicographically Smallest Equivalent String	★★	recursive
	1071	Greatest Common Divisor of Strings	★
	1072	Flip Columns For Maximum Number of Equal Rows	★★
	1073	Adding Two Negabinary Numbers	★★
	1074	Number of Submatrices That Sum to Target	★★★
	1078	Occurrences After Bigram	★
	1079	Letter Tile Possibilities	★★
	1080	Insufficient Nodes in Root to Leaf Paths	★★
	1081	Smallest Subsequence of Distinct Characters	★★
✔	1089	Duplicate Zeros	★	iterative
✔	1090	Largest Values From Labels	★★	greedy
	1091	Shortest Path in Binary Matrix	★★
	1092	Shortest Common Supersequence	★★★
✔	1093	Statistics from a Large Sample	★★	iterative
✔	1094	Car Pooling	★★	iterative
	1095	Find in Mountain Array	★★★
	1096	Brace Expansion II	★★★
	1103	Distribute Candies to People	★
✔	1104	Path In Zigzag Labelled Binary Tree	★★	iterative
✔	1105	Filling Bookcase Shelves	★★	dp
	1106	Parsing A Boolean Expression	★★★
✔	1108	Defanging an IP Address	★	replace
	1109	Corporate Flight Bookings	★★
	1110	Delete Nodes And Return Forest	★★
	1111	Maximum Nesting Depth of Two Valid Parentheses Strings	★★
✔	1122	Relative Sort Array	★	sort_by_key
	1123	Lowest Common Ancestor of Deepest Leaves	★★
	1124	Longest Well-Performing Interval	★★
	1125	Smallest Sufficient Team	★★★
	1128	Number of Equivalent Domino Pairs	★
	1129	Shortest Path with Alternating Colors	★★
	1130	Minimum Cost Tree From Leaf Values	★★
	1131	Maximum of Absolute Value Expression	★★
	1137	N-th Tribonacci Number	★
	1138	Alphabet Board Path	★★
	1139	Largest 1-Bordered Square	★★
	1140	Stone Game II	★★
	1143	Longest Common Subsequence	★★
	1144	Decrease Elements To Make Array Zigzag	★★
	1145	Binary Tree Coloring Game	★★
✔	1146	Snapshot Array	★★	binary_search
	1147	Longest Chunked Palindrome Decomposition	★★★
✔	1154	Day of the Year	★	iterative
	1155	Number of Dice Rolls With Target Sum	★★
	1156	Swap For Longest Repeated Character Substring	★★
	1157	Online Majority Element In Subarray	★★★
	1160	Find Words That Can Be Formed by Characters	★
✔	1161	Maximum Level Sum of a Binary Tree	★★	bfs
	1162	As Far from Land as Possible	★★
	1163	Last Substring in Lexicographical Order	★★★
	1169	Invalid Transactions	★★
✔	1170	Compare Strings by Frequency of the Smallest Character	★★	binary_search
✔	1171	Remove Zero Sum Consecutive Nodes from Linked List	★★	recursive
	1172	Dinner Plate Stacks	★★★
	1175	Prime Arrangements	★
	1177	Can Make Palindrome from Substring	★★
	1178	Number of Valid Words for Each Puzzle	★★★
	1184	Distance Between Bus Stops	★
	1185	Day of the Week	★
	1186	Maximum Subarray Sum with One Deletion	★★
	1187	Make Array Strictly Increasing	★★★
✔	1189	Maximum Number of Balloons	★	math
✔	1190	Reverse Substrings Between Each Pair of Parentheses	★★	stack
	1191	K-Concatenation Maximum Sum	★★
	1192	Critical Connections in a Network	★★★
	1200	Minimum Absolute Difference	★
	1201	Ugly Number III	★★
	1202	Smallest String With Swaps	★★
	1203	Sort Items by Groups Respecting Dependencies	★★★
	1206	Design Skiplist	★★★
	1207	Unique Number of Occurrences	★
	1208	Get Equal Substrings Within Budget	★★
✔	1209	Remove All Adjacent Duplicates in String II	★★	stack
	1210	Minimum Moves to Reach Target with Rotations	★★★
	1217	Minimum Cost to Move Chips to The Same Position	★
✔	1218	Longest Arithmetic Subsequence of Given Difference	★★	dp
	1219	Path with Maximum Gold	★★
	1220	Count Vowels Permutation	★★★
✔	1221	Split a String in Balanced Strings	★	iterative
	1222	Queens That Can Attack the King	★★
	1223	Dice Roll Simulation	★★★
	1224	Maximum Equal Frequency	★★★
	1227	Airplane Seat Assignment Probability	★★
✔	1232	Check If It Is a Straight Line	★	math
✔	1233	Remove Sub-Folders from the Filesystem	★★	trie
	1234	Replace the Substring for Balanced String	★★
	1235	Maximum Profit in Job Scheduling	★★★
	1237	Find Positive Integer Solution for a Given Equation	★★
	1238	Circular Permutation in Binary Representation	★★
	1239	Maximum Length of a Concatenated String with Unique Characters	★★
	1240	Tiling a Rectangle with the Fewest Squares	★★★
	1247	Minimum Swaps to Make Strings Equal	★★
✔	1248	Count Number of Nice Subarrays	★★	math prefix_sum
	1249	Minimum Remove to Make Valid Parentheses	★★
	1250	Check If It Is a Good Array	★★★
	1252	Cells with Odd Values in a Matrix	★
	1253	Reconstruct a 2-Row Binary Matrix	★★
	1254	Number of Closed Islands	★★
	1255	Maximum Score Words Formed by Letters	★★★
	1260	Shift 2D Grid	★
✔	1261	Find Elements in a Contaminated Binary Tree	★★	recursive
	1262	Greatest Sum Divisible by Three	★★
	1263	Minimum Moves to Move a Box to Their Target Location	★★★
	1266	Minimum Time Visiting All Points	★
	1267	Count Servers that Communicate	★★
✔	1268	Search Suggestions System	★★	binary_search iterative
	1269	Number of Ways to Stay in the Same Place After Some Steps	★★★
	1275	Find Winner on a Tic Tac Toe Game	★
	1276	Number of Burgers with No Waste of Ingredients	★★
	1277	Count Square Submatrices with All Ones	★★
	1278	Palindrome Partitioning III	★★★
✔	1281	Subtract the Product and Sum of Digits of an Integer	★	iterative
✔	1282	Group the People Given the Group Size They Belong To	★★	iterative
	1283	Find the Smallest Divisor Given a Threshold	★★
	1284	Minimum Number of Flips to Convert Binary Matrix to Zero Matrix	★★★
	1286	Iterator for Combination	★★
✔	1287	Element Appearing More Than 25% In Sorted Array	★	iterative
✔	1288	Remove Covered Intervals	★★	greedy
	1289	Minimum Falling Path Sum II	★★★
	1290	Convert Binary Number in a Linked List to Integer	★
✔	1291	Sequential Digits	★★	iterative
	1292	Maximum Side Length of a Square with Sum Less than or Equal to Threshold	★★
	1293	Shortest Path in a Grid with Obstacles Elimination	★★★
✔	1295	Find Numbers with Even Number of Digits	★	iterative
	1296	Divide Array in Sets of K Consecutive Numbers	★★
	1297	Maximum Number of Occurrences of a Substring	★★
	1298	Maximum Candies You Can Get from Boxes	★★★
✔	1299	Replace Elements with Greatest Element on Right Side	★	iterative
	1300	Sum of Mutated Array Closest to Target	★★
	1301	Number of Paths with Max Score	★★★
✔	1302	Deepest Leaves Sum	★★	bfs
	1304	Find N Unique Integers Sum up to Zero	★
	1305	All Elements in Two Binary Search Trees	★★
	1306	Jump Game III	★★
	1307	Verbal Arithmetic Puzzle	★★★
	1309	Decrypt String from Alphabet to Integer Mapping	★
✔	1310	XOR Queries of a Subarray	★★	prefix_xor
	1311	Get Watched Videos by Your Friends	★★
	1312	Minimum Insertion Steps to Make a String Palindrome	★★★
	1313	Decompress Run-Length Encoded List	★
	1314	Matrix Block Sum	★★
✔	1315	Sum of Nodes with Even-Valued Grandparent	★★	recursive
	1316	Distinct Echo Substrings	★★★
	1317	Convert Integer to the Sum of Two No-Zero Integers	★
	1318	Minimum Flips to Make a OR b Equal to c	★★
	1319	Number of Operations to Make Network Connected	★★
	1320	Minimum Distance to Type a Word Using Two Fingers	★★★
	1323	Maximum 69 Number	★
✔	1324	Print Words Vertically	★★	iterative
✔	1325	Delete Leaves With a Given Value	★★	recursive
	1326	Minimum Number of Taps to Open to Water a Garden	★★★
	1328	Break a Palindrome	★★
	1329	Sort the Matrix Diagonally	★★
	1330	Reverse Subarray To Maximize Array Value	★★★
	1331	Rank Transform of an Array	★
	1332	Remove Palindromic Subsequences	★
✔	1333	Filter Restaurants by Vegan-Friendly, Price and Distance	★★	sort
	1334	Find the City With the Smallest Number of Neighbors at a Threshold Distance	★★
	1335	Minimum Difficulty of a Job Schedule	★★★
	1337	The K Weakest Rows in a Matrix	★
✔	1338	Reduce Array Size to The Half	★★	greedy
	1339	Maximum Product of Splitted Binary Tree	★★
	1340	Jump Game V	★★★
	1342	Number of Steps to Reduce a Number to Zero	★
	1343	Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold	★★
✔	1344	Angle Between Hands of a Clock	★★	math
	1345	Jump Game IV	★★★
✔	1346	Check If N and Its Double Exist	★	hash_set
	1347	Minimum Number of Steps to Make Two Strings Anagram	★★
	1348	Tweet Counts Per Frequency	★★
	1349	Maximum Students Taking Exam	★★★
	1351	Count Negative Numbers in a Sorted Matrix	★
	1352	Product of the Last K Numbers	★★
	1353	Maximum Number of Events That Can Be Attended	★★
	1354	Construct Target Array With Multiple Sums	★★★
	1356	Sort Integers by The Number of 1 Bits	★
✔	1357	Apply Discount Every n Orders	★★	array
	1358	Number of Substrings Containing All Three Characters	★★
	1359	Count All Valid Pickup and Delivery Options	★★★
	1360	Number of Days Between Two Dates	★
	1361	Validate Binary Tree Nodes	★★
	1362	Closest Divisors	★★
	1363	Largest Multiple of Three	★★★
	1365	How Many Numbers Are Smaller Than the Current Number	★
	1366	Rank Teams by Votes	★★
	1367	Linked List in Binary Tree	★★
	1368	Minimum Cost to Make at Least One Valid Path in a Grid	★★★
	1370	Increasing Decreasing String	★
	1371	Find the Longest Substring Containing Vowels in Even Counts	★★
	1372	Longest ZigZag Path in a Binary Tree	★★
	1373	Maximum Sum BST in Binary Tree	★★★
	1374	Generate a String With Characters That Have Odd Counts	★
✔	1375	Number of Times Binary String Is Prefix-Aligned	★★	iterative
	1376	Time Needed to Inform All Employees	★★
	1377	Frog Position After T Seconds	★★★
	1379	Find a Corresponding Node of a Binary Tree in a Clone of That Tree	★
	1380	Lucky Numbers in a Matrix	★
✔	1381	Design a Stack With Increment Operation	★★	iterative
	1382	Balance a Binary Search Tree	★★
	1383	Maximum Performance of a Team	★★★
	1385	Find the Distance Value Between Two Arrays	★
	1386	Cinema Seat Allocation	★★
✔	1387	Sort Integers by The Power Value	★★	select
	1388	Pizza With 3n Slices	★★★
	1389	Create Target Array in the Given Order	★
✔	1390	Four Divisors	★★	sqrt
	1391	Check if There is a Valid Path in a Grid	★★
	1392	Longest Happy Prefix	★★★
	1394	Find Lucky Integer in an Array	★
	1395	Count Number of Teams	★★
✔	1396	Design Underground System	★★	hash_map
	1397	Find All Good Strings	★★★
	1399	Count Largest Group	★
	1400	Construct K Palindrome Strings	★★
	1401	Circle and Rectangle Overlapping	★★
	1402	Reducing Dishes	★★★
	1403	Minimum Subsequence in Non-Increasing Order	★
	1404	Number of Steps to Reduce a Number in Binary Representation to One	★★
	1405	Longest Happy String	★★
	1406	Stone Game III	★★★
	1408	String Matching in an Array	★
	1409	Queries on a Permutation With Key	★★
	1410	HTML Entity Parser	★★
	1411	Number of Ways to Paint N × 3 Grid	★★★
	1413	Minimum Value to Get Positive Step by Step Sum	★
	1414	Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	★★
	1415	The k-th Lexicographical String of All Happy Strings of Length n	★★
	1416	Restore The Array	★★★
	1417	Reformat The String	★
✔	1418	Display Table of Food Orders in a Restaurant	★★	hash_map
	1419	Minimum Number of Frogs Croaking	★★
	1420	Build Array Where You Can Find The Maximum Exactly K Comparisons	★★★
	1422	Maximum Score After Splitting a String	★
	1423	Maximum Points You Can Obtain from Cards	★★
	1424	Diagonal Traverse II	★★
	1425	Constrained Subsequence Sum	★★★
	1431	Kids With the Greatest Number of Candies	★
	1432	Max Difference You Can Get From Changing an Integer	★★
✔	1433	Check If a String Can Break Another String	★★	greedy
	1434	Number of Ways to Wear Different Hats to Each Other	★★★
	1436	Destination City	★
	1437	Check If All 1's Are at Least Length K Places Away	★
	1438	Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	★★
	1439	Find the Kth Smallest Sum of a Matrix With Sorted Rows	★★★
✔	1441	Build an Array With Stack Operations	★★	iterative
	1442	Count Triplets That Can Form Two Arrays of Equal XOR	★★
	1443	Minimum Time to Collect All Apples in a Tree	★★
	1444	Number of Ways of Cutting a Pizza	★★★
	1446	Consecutive Characters	★
✔	1447	Simplified Fractions	★★	gcd
✔	1448	Count Good Nodes in Binary Tree	★★	recursive
	1449	Form Largest Integer With Digits That Add up to Target	★★★
	1450	Number of Students Doing Homework at a Given Time	★
✔	1451	Rearrange Words in a Sentence	★★	sort
✔	1452	People Whose List of Favorite Companies Is Not a Subset of Another List	★★	intersection
	1453	Maximum Number of Darts Inside of a Circular Dartboard	★★★
	1455	Check If a Word Occurs As a Prefix of Any Word in a Sentence	★
	1456	Maximum Number of Vowels in a Substring of Given Length	★★
	1457	Pseudo-Palindromic Paths in a Binary Tree	★★
	1458	Max Dot Product of Two Subsequences	★★★
	1460	Make Two Arrays Equal by Reversing Subarrays	★
	1461	Check If a String Contains All Binary Codes of Size K	★★
	1462	Course Schedule IV	★★
	1463	Cherry Pickup II	★★★
	1464	Maximum Product of Two Elements in an Array	★
	1465	Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts	★★
	1466	Reorder Routes to Make All Paths Lead to the City Zero	★★
	1467	Probability of a Two Boxes Having The Same Number of Distinct Balls	★★★
✔	1470	Shuffle the Array	★	iterative
	1471	The k Strongest Values in an Array	★★
✔	1472	Design Browser History	★★	stack
	1473	Paint House III	★★★
	1475	Final Prices With a Special Discount in a Shop	★
	1476	Subrectangle Queries	★★
	1477	Find Two Non-overlapping Sub-arrays Each With Target Sum	★★
	1478	Allocate Mailboxes	★★★
	1480	Running Sum of 1d Array	★
✔	1481	Least Number of Unique Integers after K Removals	★★	greedy
	1482	Minimum Number of Days to Make m Bouquets	★★
	1483	Kth Ancestor of a Tree Node	★★★
✔	1486	XOR Operation in an Array	★	iterative
✔	1487	Making File Names Unique	★★	hash_map
	1488	Avoid Flood in The City	★★
	1489	Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree	★★★
	1491	Average Salary Excluding the Minimum and Maximum Salary	★
	1492	The kth Factor of n	★★
	1493	Longest Subarray of 1's After Deleting One Element	★★
	1494	Parallel Courses II	★★★
	1496	Path Crossing	★
	1497	Check If Array Pairs Are Divisible by k	★★
	1498	Number of Subsequences That Satisfy the Given Sum Condition	★★
	1499	Max Value of Equation	★★★
	1502	Can Make Arithmetic Progression From Sequence	★
	1503	Last Moment Before All Ants Fall Out of a Plank	★★
	1504	Count Submatrices With All Ones	★★
	1505	Minimum Possible Integer After at Most K Adjacent Swaps On Digits	★★★
✔	1507	Reformat Date	★	parse
✔	1508	Range Sum of Sorted Subarray Sums	★★	select
	1509	Minimum Difference Between Largest and Smallest Value in Three Moves	★★
	1510	Stone Game IV	★★★
	1512	Number of Good Pairs	★
	1513	Number of Substrings With Only 1s	★★
	1514	Path with Maximum Probability	★★
	1515	Best Position for a Service Centre	★★★
	1518	Water Bottles	★
	1519	Number of Nodes in the Sub-Tree With the Same Label	★★
	1520	Maximum Number of Non-Overlapping Substrings	★★★
	1521	Find a Value of a Mysterious Function Closest to Target	★★★
	1523	Count Odd Numbers in an Interval Range	★
	1524	Number of Sub-arrays With Odd Sum	★★
✔	1525	Number of Good Ways to Split a String	★★	iterative
	1526	Minimum Number of Increments on Subarrays to Form a Target Array	★★★
✔	1528	Shuffle String	★	iterative
✔	1529	Minimum Suffix Flips	★★	iterative
	1530	Number of Good Leaf Nodes Pairs	★★
	1531	String Compression II	★★★
	1534	Count Good Triplets	★
	1535	Find the Winner of an Array Game	★★
	1536	Minimum Swaps to Arrange a Binary Grid	★★
	1537	Get the Maximum Score	★★★
	1539	Kth Missing Positive Number	★
	1540	Can Convert String in K Moves	★★
	1541	Minimum Insertions to Balance a Parentheses String	★★
	1542	Find Longest Awesome Substring	★★★
	1544	Make The String Great	★
✔	1545	Find Kth Bit in Nth Binary String	★★	recursive
	1546	Maximum Number of Non-Overlapping Subarrays With Sum Equals Target	★★
	1547	Minimum Cost to Cut a Stick	★★★
	1550	Three Consecutive Odds	★
	1551	Minimum Operations to Make Array Equal	★★
	1552	Magnetic Force Between Two Balls	★★
	1553	Minimum Number of Days to Eat N Oranges	★★★
	1556	Thousand Separator	★
	1557	Minimum Number of Vertices to Reach All Nodes	★★
	1558	Minimum Numbers of Function Calls to Make Target Array	★★
	1559	Detect Cycles in 2D Grid	★★
	1560	Most Visited Sector in a Circular Track	★
✔	1561	Maximum Number of Coins You Can Get	★★	greedy
	1562	Find Latest Group of Size M	★★
	1563	Stone Game V	★★★
	1566	Detect Pattern of Length M Repeated K or More Times	★
	1567	Maximum Length of Subarray With Positive Product	★★
	1568	Minimum Number of Days to Disconnect Island	★★★
	1569	Number of Ways to Reorder Array to Get Same BST	★★★
	1572	Matrix Diagonal Sum	★
	1573	Number of Ways to Split a String	★★
	1574	Shortest Subarray to be Removed to Make Array Sorted	★★
	1575	Count All Possible Routes	★★★
	1576	Replace All ?'s to Avoid Consecutive Repeating Characters	★
	1577	Number of Ways Where Square of Number Is Equal to Product of Two Numbers	★★
	1578	Minimum Time to Make Rope Colorful	★★
	1579	Remove Max Number of Edges to Keep Graph Fully Traversable	★★★
	1582	Special Positions in a Binary Matrix	★
	1583	Count Unhappy Friends	★★
	1584	Min Cost to Connect All Points	★★
	1585	Check If String Is Transformable With Substring Sort Operations	★★★
	1588	Sum of All Odd Length Subarrays	★
	1589	Maximum Sum Obtained of Any Permutation	★★
	1590	Make Sum Divisible by P	★★
	1591	Strange Printer II	★★★
	1592	Rearrange Spaces Between Words	★
	1593	Split a String Into the Max Number of Unique Substrings	★★
	1594	Maximum Non Negative Product in a Matrix	★★
	1595	Minimum Cost to Connect Two Groups of Points	★★★
	1598	Crawler Log Folder	★
	1599	Maximum Profit of Operating a Centennial Wheel	★★
	1600	Throne Inheritance	★★
	1601	Maximum Number of Achievable Transfer Requests	★★★
	1603	Design Parking System	★
	1604	Alert Using Same Key-Card Three or More Times in a One Hour Period	★★
	1605	Find Valid Matrix Given Row and Column Sums	★★
	1606	Find Servers That Handled Most Number of Requests	★★★
	1608	Special Array With X Elements Greater Than or Equal X	★
✔	1609	Even Odd Tree	★★	queue
	1610	Maximum Number of Visible Points	★★★
	1611	Minimum One Bit Operations to Make Integers Zero	★★★
	1614	Maximum Nesting Depth of the Parentheses	★
	1615	Maximal Network Rank	★★
	1616	Split Two Strings to Make Palindrome	★★
	1617	Count Subtrees With Max Distance Between Cities	★★★
	1619	Mean of Array After Removing Some Elements	★
	1620	Coordinate With Maximum Network Quality	★★
	1621	Number of Sets of K Non-Overlapping Line Segments	★★
	1622	Fancy Sequence	★★★
	1624	Largest Substring Between Two Equal Characters	★
	1625	Lexicographically Smallest String After Applying Operations	★★
	1626	Best Team With No Conflicts	★★
	1627	Graph Connectivity With Threshold	★★★
	1629	Slowest Key	★
	1630	Arithmetic Subarrays	★★
	1631	Path With Minimum Effort	★★
	1632	Rank Transform of a Matrix	★★★
	1636	Sort Array by Increasing Frequency	★
	1637	Widest Vertical Area Between Two Points Containing No Points	★
	1638	Count Substrings That Differ by One Character	★★
	1639	Number of Ways to Form a Target String Given a Dictionary	★★★
	1640	Check Array Formation Through Concatenation	★
	1641	Count Sorted Vowel Strings	★★
	1642	Furthest Building You Can Reach	★★
	1643	Kth Smallest Instructions	★★★
	1646	Get Maximum in Generated Array	★
	1647	Minimum Deletions to Make Character Frequencies Unique	★★
	1648	Sell Diminishing-Valued Colored Balls	★★
	1649	Create Sorted Array through Instructions	★★★
	1652	Defuse the Bomb	★
	1653	Minimum Deletions to Make String Balanced	★★
	1654	Minimum Jumps to Reach Home	★★
	1655	Distribute Repeating Integers	★★★
	1656	Design an Ordered Stream	★
	1657	Determine if Two Strings Are Close	★★
	1658	Minimum Operations to Reduce X to Zero	★★
	1659	Maximize Grid Happiness	★★★
	1662	Check If Two String Arrays are Equivalent	★
✔	1663	Smallest String With A Given Numeric Value	★★	iterative
✔	1664	Ways to Make a Fair Array	★★	iterative
	1665	Minimum Initial Energy to Finish Tasks	★★★
	1668	Maximum Repeating Substring	★
	1669	Merge In Between Linked Lists	★★
	1670	Design Front Middle Back Queue	★★
	1671	Minimum Number of Removals to Make Mountain Array	★★★
	1672	Richest Customer Wealth	★
	1673	Find the Most Competitive Subsequence	★★
	1674	Minimum Moves to Make Array Complementary	★★
	1675	Minimize Deviation in Array	★★★
	1678	Goal Parser Interpretation	★
	1679	Max Number of K-Sum Pairs	★★
	1680	Concatenation of Consecutive Binary Numbers	★★
	1681	Minimum Incompatibility	★★★
	1684	Count the Number of Consistent Strings	★
✔	1685	Sum of Absolute Differences in a Sorted Array	★★	prefix_sum
	1686	Stone Game VI	★★
	1687	Delivering Boxes from Storage to Ports	★★★
	1688	Count of Matches in Tournament	★
	1689	Partitioning Into Minimum Number Of Deci-Binary Numbers	★★
	1690	Stone Game VII	★★
	1691	Maximum Height by Stacking Cuboids	★★★
	1694	Reformat Phone Number	★
✔	1695	Maximum Erasure Value	★★	prefix_sum
	1696	Jump Game VI	★★
	1697	Checking Existence of Edge Length Limited Paths	★★★
	1700	Number of Students Unable to Eat Lunch	★
✔	1701	Average Waiting Time	★★	iterative
	1702	Maximum Binary String After Change	★★
	1703	Minimum Adjacent Swaps for K Consecutive Ones	★★★
	1704	Determine if String Halves Are Alike	★
	1705	Maximum Number of Eaten Apples	★★
	1706	Where Will the Ball Fall	★★
	1707	Maximum XOR With an Element From Array	★★★
	1710	Maximum Units on a Truck	★
	1711	Count Good Meals	★★
	1712	Ways to Split Array Into Three Subarrays	★★
	1713	Minimum Operations to Make a Subsequence	★★★
	1716	Calculate Money in Leetcode Bank	★
	1717	Maximum Score From Removing Substrings	★★
	1718	Construct the Lexicographically Largest Valid Sequence	★★
	1719	Number Of Ways To Reconstruct A Tree	★★★
✔	1720	Decode XORed Array	★	xor
	1721	Swapping Nodes in a Linked List	★★
	1722	Minimize Hamming Distance After Swap Operations	★★
	1723	Find Minimum Time to Finish All Jobs	★★★
	1725	Number Of Rectangles That Can Form The Largest Square	★
	1726	Tuple with Same Product	★★
	1727	Largest Submatrix With Rearrangements	★★
	1728	Cat and Mouse II	★★★
	1732	Find the Highest Altitude	★
	1733	Minimum Number of People to Teach	★★
	1734	Decode XORed Permutation	★★
	1735	Count Ways to Make Array With Product	★★★
	1736	Latest Time by Replacing Hidden Digits	★
	1737	Change Minimum Characters to Satisfy One of Three Conditions	★★
	1738	Find Kth Largest XOR Coordinate Value	★★
	1739	Building Boxes	★★★
	1742	Maximum Number of Balls in a Box	★
	1743	Restore the Array From Adjacent Pairs	★★
	1744	Can You Eat Your Favorite Candy on Your Favorite Day?	★★
	1745	Palindrome Partitioning IV	★★★
	1748	Sum of Unique Elements	★
	1749	Maximum Absolute Sum of Any Subarray	★★
	1750	Minimum Length of String After Deleting Similar Ends	★★
	1751	Maximum Number of Events That Can Be Attended II	★★★
	1752	Check if Array Is Sorted and Rotated	★
	1753	Maximum Score From Removing Stones	★★
	1754	Largest Merge Of Two Strings	★★
	1755	Closest Subsequence Sum	★★★
	1758	Minimum Changes To Make Alternating Binary String	★
	1759	Count Number of Homogenous Substrings	★★
	1760	Minimum Limit of Balls in a Bag	★★
	1761	Minimum Degree of a Connected Trio in a Graph	★★★
	1763	Longest Nice Substring	★
	1764	Form Array by Concatenating Subarrays of Another Array	★★
	1765	Map of Highest Peak	★★
	1766	Tree of Coprimes	★★★
	1768	Merge Strings Alternately	★
	1769	Minimum Number of Operations to Move All Balls to Each Box	★★
	1770	Maximum Score from Performing Multiplication Operations	★★★
	1771	Maximize Palindrome Length From Subsequences	★★★
	1773	Count Items Matching a Rule	★
	1774	Closest Dessert Cost	★★
	1775	Equal Sum Arrays With Minimum Number of Operations	★★
	1776	Car Fleet II	★★★
	1779	Find Nearest Point That Has the Same X or Y Coordinate	★
	1780	Check if Number is a Sum of Powers of Three	★★
	1781	Sum of Beauty of All Substrings	★★
	1782	Count Pairs Of Nodes	★★★
	1784	Check if Binary String Has at Most One Segment of Ones	★
	1785	Minimum Elements to Add to Form a Given Sum	★★
	1786	Number of Restricted Paths From First to Last Node	★★
	1787	Make the XOR of All Segments Equal to Zero	★★★
	1790	Check if One String Swap Can Make Strings Equal	★
	1791	Find Center of Star Graph	★
	1792	Maximum Average Pass Ratio	★★
	1793	Maximum Score of a Good Subarray	★★★
	1796	Second Largest Digit in a String	★
✔	1797	Design Authentication Manager	★★	binary_heap
	1798	Maximum Number of Consecutive Values You Can Make	★★
	1799	Maximize Score After N Operations	★★★
	1800	Maximum Ascending Subarray Sum	★
	1801	Number of Orders in the Backlog	★★
	1802	Maximum Value at a Given Index in a Bounded Array	★★
	1803	Count Pairs With XOR in a Range	★★★
	1805	Number of Different Integers in a String	★
	1806	Minimum Number of Operations to Reinitialize a Permutation	★★
	1807	Evaluate the Bracket Pairs of a String	★★
	1808	Maximize Number of Nice Divisors	★★★
	1812	Determine Color of a Chessboard Square	★
	1813	Sentence Similarity III	★★
	1814	Count Nice Pairs in an Array	★★
	1815	Maximum Number of Groups Getting Fresh Donuts	★★★
	1816	Truncate Sentence	★
	1817	Finding the Users Active Minutes	★★
	1818	Minimum Absolute Sum Difference	★★
	1819	Number of Different Subsequences GCDs	★★★
	1822	Sign of the Product of an Array	★
	1823	Find the Winner of the Circular Game	★★
	1824	Minimum Sideway Jumps	★★
	1825	Finding MK Average	★★★
	1827	Minimum Operations to Make the Array Increasing	★
	1828	Queries on Number of Points Inside a Circle	★★
	1829	Maximum XOR for Each Query	★★
	1830	Minimum Number of Operations to Make String Sorted	★★★
	1832	Check if the Sentence Is Pangram	★
	1833	Maximum Ice Cream Bars	★★
	1834	Single-Threaded CPU	★★
	1835	Find XOR Sum of All Pairs Bitwise AND	★★★
	1837	Sum of Digits in Base K	★
	1838	Frequency of the Most Frequent Element	★★
	1839	Longest Substring Of All Vowels in Order	★★
	1840	Maximum Building Height	★★★
	1844	Replace All Digits with Characters	★
	1845	Seat Reservation Manager	★★
	1846	Maximum Element After Decreasing and Rearranging	★★
	1847	Closest Room	★★★
	1848	Minimum Distance to the Target Element	★
	1849	Splitting a String Into Descending Consecutive Values	★★
	1850	Minimum Adjacent Swaps to Reach the Kth Smallest Number	★★
	1851	Minimum Interval to Include Each Query	★★★
	1854	Maximum Population Year	★
	1855	Maximum Distance Between a Pair of Values	★★
	1856	Maximum Subarray Min-Product	★★
	1857	Largest Color Value in a Directed Graph	★★★
	1859	Sorting the Sentence	★
	1860	Incremental Memory Leak	★★
	1861	Rotating the Box	★★
	1862	Sum of Floored Pairs	★★★
	1863	Sum of All Subset XOR Totals	★
	1864	Minimum Number of Swaps to Make the Binary String Alternating	★★
	1865	Finding Pairs With a Certain Sum	★★
	1866	Number of Ways to Rearrange Sticks With K Sticks Visible	★★★
	1869	Longer Contiguous Segments of Ones than Zeros	★
	1870	Minimum Speed to Arrive on Time	★★
	1871	Jump Game VII	★★
	1872	Stone Game VIII	★★★
	1876	Substrings of Size Three with Distinct Characters	★
	1877	Minimize Maximum Pair Sum in Array	★★
	1878	Get Biggest Three Rhombus Sums in a Grid	★★
	1879	Minimum XOR Sum of Two Arrays	★★★
	1880	Check if Word Equals Summation of Two Words	★
	1881	Maximum Value after Insertion	★★
	1882	Process Tasks Using Servers	★★
	1883	Minimum Skips to Arrive at Meeting On Time	★★★
	1884	Egg Drop With 2 Eggs and N Floors	★★
	1886	Determine Whether Matrix Can Be Obtained By Rotation	★
	1887	Reduction Operations to Make the Array Elements Equal	★★
	1888	Minimum Number of Flips to Make the Binary String Alternating	★★
	1889	Minimum Space Wasted From Packaging	★★★
	1893	Check if All the Integers in a Range Are Covered	★
	1894	Find the Student that Will Replace the Chalk	★★
	1895	Largest Magic Square	★★
	1896	Minimum Cost to Change the Final Value of Expression	★★★
	1897	Redistribute Characters to Make All Strings Equal	★
	1898	Maximum Number of Removable Characters	★★
	1899	Merge Triplets to Form Target Triplet	★★
	1900	The Earliest and Latest Rounds Where Players Compete	★★★
	1901	Find a Peak Element II	★★
	1903	Largest Odd Number in String	★
	1904	The Number of Full Rounds You Have Played	★★
	1905	Count Sub Islands	★★
	1906	Minimum Absolute Difference Queries	★★
	1909	Remove One Element to Make the Array Strictly Increasing	★
	1910	Remove All Occurrences of a Substring	★★
	1911	Maximum Alternating Subsequence Sum	★★
	1912	Design Movie Rental System	★★★
	1913	Maximum Product Difference Between Two Pairs	★
	1914	Cyclically Rotating a Grid	★★
	1915	Number of Wonderful Substrings	★★
	1916	Count Ways to Build Rooms in an Ant Colony	★★★
	1920	Build Array from Permutation	★
	1921	Eliminate Maximum Number of Monsters	★★
	1922	Count Good Numbers	★★
	1923	Longest Common Subpath	★★★
	1925	Count Square Sum Triples	★
	1926	Nearest Exit from Entrance in Maze	★★
	1927	Sum Game	★★
	1928	Minimum Cost to Reach Destination in Time	★★★
	1929	Concatenation of Array	★
	1930	Unique Length-3 Palindromic Subsequences	★★
	1931	Painting a Grid With Three Different Colors	★★★
	1932	Merge BSTs to Create Single BST	★★★
	1935	Maximum Number of Words You Can Type	★
	1936	Add Minimum Number of Rungs	★★
	1937	Maximum Number of Points with Cost	★★
	1938	Maximum Genetic Difference Query	★★★
	1941	Check if All Characters Have Equal Number of Occurrences	★
	1942	The Number of the Smallest Unoccupied Chair	★★
	1943	Describe the Painting	★★
	1944	Number of Visible People in a Queue	★★★
	1945	Sum of Digits of String After Convert	★
	1946	Largest Number After Mutating Substring	★★
	1947	Maximum Compatibility Score Sum	★★
	1948	Delete Duplicate Folders in System	★★★
	1952	Three Divisors	★
	1953	Maximum Number of Weeks for Which You Can Work	★★
	1954	Minimum Garden Perimeter to Collect Enough Apples	★★
	1955	Count Number of Special Subsequences	★★★
	1957	Delete Characters to Make Fancy String	★
	1958	Check if Move is Legal	★★
	1959	Minimum Total Space Wasted With K Resizing Operations	★★
	1960	Maximum Product of the Length of Two Palindromic Substrings	★★★
	1961	Check If String Is a Prefix of Array	★
	1962	Remove Stones to Minimize the Total	★★
	1963	Minimum Number of Swaps to Make the String Balanced	★★
	1964	Find the Longest Valid Obstacle Course at Each Position	★★★
	1967	Number of Strings That Appear as Substrings in Word	★
	1968	Array With Elements Not Equal to Average of Neighbors	★★
	1969	Minimum Non-Zero Product of the Array Elements	★★
	1970	Last Day Where You Can Still Cross	★★★
	1971	Find if Path Exists in Graph	★
	1974	Minimum Time to Type Word Using Special Typewriter	★
	1975	Maximum Matrix Sum	★★
	1976	Number of Ways to Arrive at Destination	★★
	1977	Number of Ways to Separate Numbers	★★★
	1979	Find Greatest Common Divisor of Array	★
	1980	Find Unique Binary String	★★
	1981	Minimize the Difference Between Target and Chosen Elements	★★
	1982	Find Array Given Subset Sums	★★★
	1984	Minimum Difference Between Highest and Lowest of K Scores	★
	1985	Find the Kth Largest Integer in the Array	★★
	1986	Minimum Number of Work Sessions to Finish the Tasks	★★
	1987	Number of Unique Good Subsequences	★★★
	1991	Find the Middle Index in Array	★
	1992	Find All Groups of Farmland	★★
	1993	Operations on Tree	★★
	1994	The Number of Good Subsets	★★★
	1995	Count Special Quadruplets	★
	1996	The Number of Weak Characters in the Game	★★
	1997	First Day Where You Have Been in All the Rooms	★★
	1998	GCD Sort of an Array	★★★
	2000	Reverse Prefix of Word	★
	2001	Number of Pairs of Interchangeable Rectangles	★★
	2002	Maximum Product of the Length of Two Palindromic Subsequences	★★
	2003	Smallest Missing Genetic Value in Each Subtree	★★★
	2006	Count Number of Pairs With Absolute Difference K	★
	2007	Find Original Array From Doubled Array	★★
	2008	Maximum Earnings From Taxi	★★
	2009	Minimum Number of Operations to Make Array Continuous	★★★
	2011	Final Value of Variable After Performing Operations	★
	2012	Sum of Beauty in the Array	★★
	2013	Detect Squares	★★
	2014	Longest Subsequence Repeated k Times	★★★
	2016	Maximum Difference Between Increasing Elements	★
	2017	Grid Game	★★
	2018	Check if Word Can Be Placed In Crossword	★★
	2019	The Score of Students Solving Math Expression	★★★
	2022	Convert 1D Array Into 2D Array	★
	2023	Number of Pairs of Strings With Concatenation Equal to Target	★★
	2024	Maximize the Confusion of an Exam	★★
	2025	Maximum Number of Ways to Partition an Array	★★★
	2027	Minimum Moves to Convert String	★
	2028	Find Missing Observations	★★
	2029	Stone Game IX	★★
	2030	Smallest K-Length Subsequence With Occurrences of a Letter	★★★
	2032	Two Out of Three	★
	2033	Minimum Operations to Make a Uni-Value Grid	★★
	2034	Stock Price Fluctuation	★★
	2035	Partition Array Into Two Arrays to Minimize Sum Difference	★★★
	2037	Minimum Number of Moves to Seat Everyone	★
	2038	Remove Colored Pieces if Both Neighbors are the Same Color	★★
	2039	The Time When the Network Becomes Idle	★★
	2040	Kth Smallest Product of Two Sorted Arrays	★★★
	2042	Check if Numbers Are Ascending in a Sentence	★
	2043	Simple Bank System	★★
	2044	Count Number of Maximum Bitwise-OR Subsets	★★
	2045	Second Minimum Time to Reach Destination	★★★
	2047	Number of Valid Words in a Sentence	★
	2048	Next Greater Numerically Balanced Number	★★
	2049	Count Nodes With the Highest Score	★★
	2050	Parallel Courses III	★★★
	2053	Kth Distinct String in an Array	★
	2054	Two Best Non-Overlapping Events	★★
	2055	Plates Between Candles	★★
	2056	Number of Valid Move Combinations On Chessboard	★★★
	2057	Smallest Index With Equal Value	★
	2058	Find the Minimum and Maximum Number of Nodes Between Critical Points	★★
	2059	Minimum Operations to Convert Number	★★
	2060	Check if an Original String Exists Given Two Encoded Strings	★★★
	2062	Count Vowel Substrings of a String	★
	2063	Vowels of All Substrings	★★
	2064	Minimized Maximum of Products Distributed to Any Store	★★
	2065	Maximum Path Quality of a Graph	★★★
	2068	Check Whether Two Strings are Almost Equivalent	★
	2069	Walking Robot Simulation II	★★
	2070	Most Beautiful Item for Each Query	★★
	2071	Maximum Number of Tasks You Can Assign	★★★
	2073	Time Needed to Buy Tickets	★
	2074	Reverse Nodes in Even Length Groups	★★
	2075	Decode the Slanted Ciphertext	★★
	2076	Process Restricted Friend Requests	★★★
	2078	Two Furthest Houses With Different Colors	★
	2079	Watering Plants	★★
	2080	Range Frequency Queries	★★
	2081	Sum of k-Mirror Numbers	★★★
	2085	Count Common Words With One Occurrence	★
	2086	Minimum Number of Food Buckets to Feed the Hamsters	★★
	2087	Minimum Cost Homecoming of a Robot in a Grid	★★
	2088	Count Fertile Pyramids in a Land	★★★
	2089	Find Target Indices After Sorting Array	★
	2090	K Radius Subarray Averages	★★
	2091	Removing Minimum and Maximum From Array	★★
	2092	Find All People With Secret	★★★
	2094	Finding 3-Digit Even Numbers	★
	2095	Delete the Middle Node of a Linked List	★★
	2096	Step-By-Step Directions From a Binary Tree Node to Another	★★
	2097	Valid Arrangement of Pairs	★★★
	2099	Find Subsequence of Length K With the Largest Sum	★
	2100	Find Good Days to Rob the Bank	★★
	2101	Detonate the Maximum Bombs	★★
	2102	Sequentially Ordinal Rank Tracker	★★★
	2103	Rings and Rods	★
	2104	Sum of Subarray Ranges	★★
	2105	Watering Plants II	★★
	2106	Maximum Fruits Harvested After at Most K Steps	★★★
	2108	Find First Palindromic String in the Array	★
	2109	Adding Spaces to a String	★★
	2110	Number of Smooth Descent Periods of a Stock	★★
	2111	Minimum Operations to Make the Array K-Increasing	★★★
	2114	Maximum Number of Words Found in Sentences	★
	2115	Find All Possible Recipes from Given Supplies	★★
	2116	Check if a Parentheses String Can Be Valid	★★
	2117	Abbreviating the Product of a Range	★★★
	2119	A Number After a Double Reversal	★
	2120	Execution of All Suffix Instructions Staying in a Grid	★★
	2121	Intervals Between Identical Elements	★★
	2122	Recover the Original Array	★★★
	2124	Check if All A's Appears Before All B's	★
	2125	Number of Laser Beams in a Bank	★★
	2126	Destroying Asteroids	★★
	2127	Maximum Employees to Be Invited to a Meeting	★★★
	2129	Capitalize the Title	★
	2130	Maximum Twin Sum of a Linked List	★★
	2131	Longest Palindrome by Concatenating Two Letter Words	★★
	2132	Stamping the Grid	★★★
	2133	Check if Every Row and Column Contains All Numbers	★
	2134	Minimum Swaps to Group All 1's Together II	★★
	2135	Count Words Obtained After Adding a Letter	★★
	2136	Earliest Possible Day of Full Bloom	★★★
	2138	Divide a String Into Groups of Size k	★
	2139	Minimum Moves to Reach Target Score	★★
	2140	Solving Questions With Brainpower	★★
	2141	Maximum Running Time of N Computers	★★★
	2144	Minimum Cost of Buying Candies With Discount	★
	2145	Count the Hidden Sequences	★★
	2146	K Highest Ranked Items Within a Price Range	★★
	2147	Number of Ways to Divide a Long Corridor	★★★
	2148	Count Elements With Strictly Smaller and Greater Elements	★
	2149	Rearrange Array Elements by Sign	★★
	2150	Find All Lonely Numbers in the Array	★★
	2151	Maximum Good People Based on Statements	★★★
	2154	Keep Multiplying Found Values by Two	★
	2155	All Divisions With the Highest Score of a Binary Array	★★
	2156	Find Substring With Given Hash Value	★★★
	2157	Groups of Strings	★★★
	2160	Minimum Sum of Four Digit Number After Splitting Digits	★
	2161	Partition Array According to Given Pivot	★★
	2162	Minimum Cost to Set Cooking Time	★★
	2163	Minimum Difference in Sums After Removal of Elements	★★★
	2164	Sort Even and Odd Indices Independently	★
	2165	Smallest Value of the Rearranged Number	★★
	2166	Design Bitset	★★
	2167	Minimum Time to Remove All Cars Containing Illegal Goods	★★★
	2169	Count Operations to Obtain Zero	★
	2170	Minimum Operations to Make the Array Alternating	★★
	2171	Removing Minimum Number of Magic Beans	★★
	2172	Maximum AND Sum of Array	★★★
	2176	Count Equal and Divisible Pairs in an Array	★
	2177	Find Three Consecutive Integers That Sum to a Given Number	★★
	2178	Maximum Split of Positive Even Integers	★★
	2179	Count Good Triplets in an Array	★★★
	2180	Count Integers With Even Digit Sum	★
	2181	Merge Nodes in Between Zeros	★★
	2182	Construct String With Repeat Limit	★★
	2183	Count Array Pairs Divisible by K	★★★
	2185	Counting Words With a Given Prefix	★
	2186	Minimum Number of Steps to Make Two Strings Anagram II	★★
	2187	Minimum Time to Complete Trips	★★
	2188	Minimum Time to Finish the Race	★★★
	2190	Most Frequent Number Following Key In an Array	★
	2191	Sort the Jumbled Numbers	★★
	2192	All Ancestors of a Node in a Directed Acyclic Graph	★★
	2193	Minimum Number of Moves to Make Palindrome	★★★
	2194	Cells in a Range on an Excel Sheet	★
	2195	Append K Integers With Minimal Sum	★★
	2196	Create Binary Tree From Descriptions	★★
	2197	Replace Non-Coprime Numbers in Array	★★★
	2200	Find All K-Distant Indices in an Array	★
	2201	Count Artifacts That Can Be Extracted	★★
	2202	Maximize the Topmost Element After K Moves	★★
	2203	Minimum Weighted Subgraph With the Required Paths	★★★
	2206	Divide Array Into Equal Pairs	★
	2207	Maximize Number of Subsequences in a String	★★
	2208	Minimum Operations to Halve Array Sum	★★
	2209	Minimum White Tiles After Covering With Carpets	★★★
	2210	Count Hills and Valleys in an Array	★
	2211	Count Collisions on a Road	★★
	2212	Maximum Points in an Archery Competition	★★
	2213	Longest Substring of One Repeating Character	★★★
	2215	Find the Difference of Two Arrays	★
	2216	Minimum Deletions to Make Array Beautiful	★★
	2217	Find Palindrome With Fixed Length	★★
	2218	Maximum Value of K Coins From Piles	★★★
	2220	Minimum Bit Flips to Convert Number	★
	2221	Find Triangular Sum of an Array	★★
	2222	Number of Ways to Select Buildings	★★
	2223	Sum of Scores of Built Strings	★★★
	2224	Minimum Number of Operations to Convert Time	★
	2225	Find Players With Zero or One Losses	★★
	2226	Maximum Candies Allocated to K Children	★★
	2227	Encrypt and Decrypt Strings	★★★
	2231	Largest Number After Digit Swaps by Parity	★
	2232	Minimize Result by Adding Parentheses to Expression	★★
	2233	Maximum Product After K Increments	★★
	2234	Maximum Total Beauty of the Gardens	★★★
	2235	Add Two Integers	★
	2236	Root Equals Sum of Children	★
	2239	Find Closest Number to Zero	★
	2240	Number of Ways to Buy Pens and Pencils	★★
	2241	Design an ATM Machine	★★
	2242	Maximum Score of a Node Sequence	★★★
	2243	Calculate Digit Sum of a String	★
	2244	Minimum Rounds to Complete All Tasks	★★
	2245	Maximum Trailing Zeros in a Cornered Path	★★
	2246	Longest Path With Different Adjacent Characters	★★★
	2248	Intersection of Multiple Arrays	★
	2249	Count Lattice Points Inside a Circle	★★
	2250	Count Number of Rectangles Containing Each Point	★★
	2251	Number of Flowers in Full Bloom	★★★
	2255	Count Prefixes of a Given String	★
	2256	Minimum Average Difference	★★
	2257	Count Unguarded Cells in the Grid	★★
	2258	Escape the Spreading Fire	★★★
	2259	Remove Digit From Number to Maximize Result	★
	2260	Minimum Consecutive Cards to Pick Up	★★
	2261	K Divisible Elements Subarrays	★★
	2262	Total Appeal of A String	★★★
	2264	Largest 3-Same-Digit Number in String	★
	2265	Count Nodes Equal to Average of Subtree	★★
	2266	Count Number of Texts	★★
	2267	Check if There Is a Valid Parentheses String Path	★★★
	2269	Find the K-Beauty of a Number	★
	2270	Number of Ways to Split Array	★★
	2271	Maximum White Tiles Covered by a Carpet	★★
	2272	Substring With Largest Variance	★★★
	2273	Find Resultant Array After Removing Anagrams	★
	2274	Maximum Consecutive Floors Without Special Floors	★★
	2275	Largest Combination With Bitwise AND Greater Than Zero	★★
	2276	Count Integers in Intervals	★★★
	2278	Percentage of Letter in String	★
	2279	Maximum Bags With Full Capacity of Rocks	★★
	2280	Minimum Lines to Represent a Line Chart	★★
	2281	Sum of Total Strength of Wizards	★★★
	2283	Check if Number Has Equal Digit Count and Digit Value	★
	2284	Sender With Largest Word Count	★★
	2285	Maximum Total Importance of Roads	★★
	2286	Booking Concert Tickets in Groups	★★★
	2287	Rearrange Characters to Make Target String	★
	2288	Apply Discount to Prices	★★
	2289	Steps to Make Array Non-decreasing	★★
	2290	Minimum Obstacle Removal to Reach Corner	★★★
	2293	Min Max Game	★
	2294	Partition Array Such That Maximum Difference Is K	★★
	2295	Replace Elements in an Array	★★
	2296	Design a Text Editor	★★★
	2299	Strong Password Checker II	★
	2300	Successful Pairs of Spells and Potions	★★
	2301	Match Substring After Replacement	★★★
	2302	Count Subarrays With Score Less Than K	★★★
	2303	Calculate Amount Paid in Taxes	★
	2304	Minimum Path Cost in a Grid	★★
	2305	Fair Distribution of Cookies	★★
	2306	Naming a Company	★★★
	2309	Greatest English Letter in Upper and Lower Case	★
	2310	Sum of Numbers With Units Digit K	★★
	2311	Longest Binary Subsequence Less Than or Equal to K	★★
	2312	Selling Pieces of Wood	★★★
	2315	Count Asterisks	★
	2316	Count Unreachable Pairs of Nodes in an Undirected Graph	★★
	2317	Maximum XOR After Operations	★★
	2318	Number of Distinct Roll Sequences	★★★
	2319	Check if Matrix Is X-Matrix	★
	2320	Count Number of Ways to Place Houses	★★
	2321	Maximum Score Of Spliced Array	★★★
	2322	Minimum Score After Removals on a Tree	★★★
	2325	Decode the Message	★
	2326	Spiral Matrix IV	★★
	2327	Number of People Aware of a Secret	★★
	2328	Number of Increasing Paths in a Grid	★★★
	2331	Evaluate Boolean Binary Tree	★
	2332	The Latest Time to Catch a Bus	★★
	2333	Minimum Sum of Squared Difference	★★
	2334	Subarray With Elements Greater Than Varying Threshold	★★★
	2335	Minimum Amount of Time to Fill Cups	★
	2336	Smallest Number in Infinite Set	★★
	2337	Move Pieces to Obtain a String	★★
	2338	Count the Number of Ideal Arrays	★★★
	2341	Maximum Number of Pairs in Array	★
	2342	Max Sum of a Pair With Equal Sum of Digits	★★
	2343	Query Kth Smallest Trimmed Number	★★
	2344	Minimum Deletions to Make Array Divisible	★★★
	2347	Best Poker Hand	★
✔	2348	Number of Zero-Filled Subarrays	★★	iterative
	2349	Design a Number Container System	★★
	2350	Shortest Impossible Sequence of Rolls	★★★
	2351	First Letter to Appear Twice	★
	2352	Equal Row and Column Pairs	★★
	2353	Design a Food Rating System	★★
	2354	Number of Excellent Pairs	★★★
	2357	Make Array Zero by Subtracting Equal Amounts	★
	2358	Maximum Number of Groups Entering a Competition	★★
	2359	Find Closest Node to Given Two Nodes	★★
	2360	Longest Cycle in a Graph	★★★
	2363	Merge Similar Items	★
	2364	Count Number of Bad Pairs	★★
	2365	Task Scheduler II	★★
	2366	Minimum Replacements to Sort the Array	★★★
	2367	Number of Arithmetic Triplets	★
	2368	Reachable Nodes With Restrictions	★★
	2369	Check if There is a Valid Partition For The Array	★★
	2370	Longest Ideal Subsequence	★★
	2373	Largest Local Values in a Matrix	★
	2374	Node With Highest Edge Score	★★
	2375	Construct Smallest Number From DI String	★★
	2376	Count Special Integers	★★★
	2379	Minimum Recolors to Get K Consecutive Black Blocks	★
	2380	Time Needed to Rearrange a Binary String	★★
	2381	Shifting Letters II	★★
	2382	Maximum Segment Sum After Removals	★★★
	2383	Minimum Hours of Training to Win a Competition	★
	2384	Largest Palindromic Number	★★
	2385	Amount of Time for Binary Tree to Be Infected	★★
	2386	Find the K-Sum of an Array	★★★
	2389	Longest Subsequence With Limited Sum	★
	2390	Removing Stars From a String	★★
	2391	Minimum Amount of Time to Collect Garbage	★★
	2392	Build a Matrix With Conditions	★★★
	2395	Find Subarrays With Equal Sum	★
	2396	Strictly Palindromic Number	★★
	2397	Maximum Rows Covered by Columns	★★
	2398	Maximum Number of Robots Within Budget	★★★
	2399	Check Distances Between Same Letters	★
	2400	Number of Ways to Reach a Position After Exactly k Steps	★★
	2401	Longest Nice Subarray	★★
	2402	Meeting Rooms III	★★★
	2404	Most Frequent Even Element	★
	2405	Optimal Partition of String	★★
	2406	Divide Intervals Into Minimum Number of Groups	★★
	2407	Longest Increasing Subsequence II	★★★
	2409	Count Days Spent Together	★
	2410	Maximum Matching of Players With Trainers	★★
	2411	Smallest Subarrays With Maximum Bitwise OR	★★
	2412	Minimum Money Required Before Transactions	★★★
	2413	Smallest Even Multiple	★
	2414	Length of the Longest Alphabetical Continuous Substring	★★
	2415	Reverse Odd Levels of Binary Tree	★★
	2416	Sum of Prefix Scores of Strings	★★★
	2418	Sort the People	★
	2419	Longest Subarray With Maximum Bitwise AND	★★
	2420	Find All Good Indices	★★
	2421	Number of Good Paths	★★★
	2423	Remove Letter To Equalize Frequency	★
	2424	Longest Uploaded Prefix	★★
	2425	Bitwise XOR of All Pairings	★★
	2426	Number of Pairs Satisfying Inequality	★★★
	2427	Number of Common Factors	★
	2428	Maximum Sum of an Hourglass	★★
	2429	Minimize XOR	★★
	2430	Maximum Deletions on a String	★★★
	2432	The Employee That Worked on the Longest Task	★
	2433	Find The Original Array of Prefix Xor	★★
	2434	Using a Robot to Print the Lexicographically Smallest String	★★
	2435	Paths in Matrix Whose Sum Is Divisible by K	★★★
	2437	Number of Valid Clock Times	★
	2438	Range Product Queries of Powers	★★
	2439	Minimize Maximum of Array	★★
	2440	Create Components With Same Value	★★★
	2441	Largest Positive Integer That Exists With Its Negative	★
	2442	Count Number of Distinct Integers After Reverse Operations	★★
	2443	Sum of Number and Its Reverse	★★
	2444	Count Subarrays With Fixed Bounds	★★★
	2446	Determine if Two Events Have Conflict	★
	2447	Number of Subarrays With GCD Equal to K	★★
	2448	Minimum Cost to Make Array Equal	★★★
	2449	Minimum Number of Operations to Make Arrays Similar	★★★
	2451	Odd String Difference	★
	2452	Words Within Two Edits of Dictionary	★★
	2453	Destroy Sequential Targets	★★
	2454	Next Greater Element IV	★★★
	2455	Average Value of Even Numbers That Are Divisible by Three	★
	2456	Most Popular Video Creator	★★
	2457	Minimum Addition to Make Integer Beautiful	★★
	2458	Height of Binary Tree After Subtree Removal Queries	★★★
	2460	Apply Operations to an Array	★
	2461	Maximum Sum of Distinct Subarrays With Length K	★★
	2462	Total Cost to Hire K Workers	★★
	2463	Minimum Total Distance Traveled	★★★
	2465	Number of Distinct Averages	★
	2466	Count Ways To Build Good Strings	★★
	2467	Most Profitable Path in a Tree	★★
	2468	Split Message Based on Limit	★★★
	2469	Convert the Temperature	★
	2470	Number of Subarrays With LCM Equal to K	★★
	2471	Minimum Number of Operations to Sort a Binary Tree by Level	★★
	2472	Maximum Number of Non-overlapping Palindrome Substrings	★★★
	2475	Number of Unequal Triplets in Array	★
	2476	Closest Nodes Queries in a Binary Search Tree	★★
	2477	Minimum Fuel Cost to Report to the Capital	★★
	2478	Number of Beautiful Partitions	★★★
	2481	Minimum Cuts to Divide a Circle	★
	2482	Difference Between Ones and Zeros in Row and Column	★★
	2483	Minimum Penalty for a Shop	★★
	2484	Count Palindromic Subsequences	★★★
	2485	Find the Pivot Integer	★
	2486	Append Characters to String to Make Subsequence	★★
	2487	Remove Nodes From Linked List	★★
	2488	Count Subarrays With Median K	★★★
	2490	Circular Sentence	★
	2491	Divide Players Into Teams of Equal Skill	★★
	2492	Minimum Score of a Path Between Two Cities	★★
	2493	Divide Nodes Into the Maximum Number of Groups	★★★
	2496	Maximum Value of a String in an Array	★
	2497	Maximum Star Sum of a Graph	★★
	2498	Frog Jump II	★★
	2499	Minimum Total Cost to Make Arrays Unequal	★★★
	2500	Delete Greatest Value in Each Row	★
	2501	Longest Square Streak in an Array	★★
	2502	Design Memory Allocator	★★
	2503	Maximum Number of Points From Grid Queries	★★★
	2506	Count Pairs Of Similar Strings	★
	2507	Smallest Value After Replacing With Sum of Prime Factors	★★
	2508	Add Edges to Make Degrees of All Nodes Even	★★★
	2509	Cycle Length Queries in a Tree	★★★
	2511	Maximum Enemy Forts That Can Be Captured	★
	2512	Reward Top K Students	★★
	2513	Minimize the Maximum of Two Arrays	★★
	2514	Count Anagrams	★★★
	2515	Shortest Distance to Target String in a Circular Array	★
	2516	Take K of Each Character From Left and Right	★★
	2517	Maximum Tastiness of Candy Basket	★★
	2518	Number of Great Partitions	★★★
	2520	Count the Digits That Divide a Number	★
	2521	Distinct Prime Factors of Product of Array	★★
	2522	Partition String Into Substrings With Values at Most K	★★
	2523	Closest Prime Numbers in Range	★★
	2525	Categorize Box According to Criteria	★
	2526	Find Consecutive Integers from a Data Stream	★★
	2527	Find Xor-Beauty of Array	★★
	2528	Maximize the Minimum Powered City	★★★
	2529	Maximum Count of Positive Integer and Negative Integer	★
	2530	Maximal Score After Applying K Operations	★★
	2531	Make Number of Distinct Characters Equal	★★
	2532	Time to Cross a Bridge	★★★
	2535	Difference Between Element Sum and Digit Sum of an Array	★
	2536	Increment Submatrices by One	★★
	2537	Count the Number of Good Subarrays	★★
	2538	Difference Between Maximum and Minimum Price Sum	★★★
	2540	Minimum Common Value	★
	2541	Minimum Operations to Make Array Equal II	★★
	2542	Maximum Subsequence Score	★★
	2543	Check if Point Is Reachable	★★★
	2544	Alternating Digit Sum	★
	2545	Sort the Students by Their Kth Score	★★
	2546	Apply Bitwise Operations to Make Strings Equal	★★
	2547	Minimum Cost to Split an Array	★★★
	2549	Count Distinct Numbers on Board	★
	2550	Count Collisions of Monkeys on a Polygon	★★
	2551	Put Marbles in Bags	★★★
	2552	Count Increasing Quadruplets	★★★
	2553	Separate the Digits in an Array	★
	2554	Maximum Number of Integers to Choose From a Range I	★★
	2555	Maximize Win From Two Segments	★★
	2556	Disconnect Path in a Binary Matrix by at Most One Flip	★★
	2558	Take Gifts From the Richest Pile	★
	2559	Count Vowel Strings in Ranges	★★
	2560	House Robber IV	★★
	2561	Rearranging Fruits	★★★
	2562	Find the Array Concatenation Value	★
	2563	Count the Number of Fair Pairs	★★
	2564	Substring XOR Queries	★★
	2565	Subsequence With the Minimum Score	★★★
	2566	Maximum Difference by Remapping a Digit	★
	2567	Minimum Score by Changing Two Elements	★★
	2568	Minimum Impossible OR	★★
	2569	Handling Sum Queries After Update	★★★
	2570	Merge Two 2D Arrays by Summing Values	★
	2571	Minimum Operations to Reduce an Integer to 0	★★
	2572	Count the Number of Square-Free Subsets	★★
	2573	Find the String with LCP	★★★
	2574	Left and Right Sum Differences	★
	2575	Find the Divisibility Array of a String	★★
	2576	Find the Maximum Number of Marked Indices	★★
	2577	Minimum Time to Visit a Cell In a Grid	★★★
	2578	Split With Minimum Sum	★
	2579	Count Total Number of Colored Cells	★★
	2580	Count Ways to Group Overlapping Ranges	★★
	2581	Count Number of Possible Root Nodes	★★★
	2582	Pass the Pillow	★
	2583	Kth Largest Sum in a Binary Tree	★★
	2584	Split the Array to Make Coprime Products	★★★
	2585	Number of Ways to Earn Points	★★★
	2586	Count the Number of Vowel Strings in Range	★
	2587	Rearrange Array to Maximize Prefix Score	★★
	2588	Count the Number of Beautiful Subarrays	★★
	2589	Minimum Time to Complete All Tasks	★★★
	2591	Distribute Money to Maximum Children	★
	2592	Maximize Greatness of an Array	★★
	2593	Find Score of an Array After Marking All Elements	★★
	2594	Minimum Time to Repair Cars	★★
	2595	Number of Even and Odd Bits	★
	2596	Check Knight Tour Configuration	★★
	2597	The Number of Beautiful Subsets	★★
	2598	Smallest Missing Non-negative Integer After Operations	★★
	2600	K Items With the Maximum Sum	★
	2601	Prime Subtraction Operation	★★
	2602	Minimum Operations to Make All Array Elements Equal	★★
	2603	Collect Coins in a Tree	★★★
	2605	Form Smallest Number From Two Digit Arrays	★
	2606	Find the Substring With Maximum Cost	★★
	2607	Make K-Subarray Sums Equal	★★
	2608	Shortest Cycle in a Graph	★★★
	2609	Find the Longest Balanced Substring of a Binary String	★
	2610	Convert an Array Into a 2D Array With Conditions	★★
	2611	Mice and Cheese	★★
	2612	Minimum Reverse Operations	★★★
	2614	Prime In Diagonal	★
	2615	Sum of Distances	★★
	2616	Minimize the Maximum Difference of Pairs	★★
	2617	Minimum Number of Visited Cells in a Grid	★★★
	2639	Find the Width of Columns of a Grid	★
	2640	Find the Score of All Prefixes of an Array	★★
	2641	Cousins in Binary Tree II	★★
	2642	Design Graph With Shortest Path Calculator	★★★
	2643	Row With Maximum Ones	★
	2644	Find the Maximum Divisibility Score	★
	2645	Minimum Additions to Make Valid String	★★
	2646	Minimize the Total Price of the Trips	★★★
	2651	Calculate Delayed Arrival Time	★
	2652	Sum Multiples	★
	2653	Sliding Subarray Beauty	★★
	2654	Minimum Number of Operations to Make All Array Elements Equal to 1	★★
	2656	Maximum Sum With Exactly K Elements	★
	2657	Find the Prefix Common Array of Two Arrays	★★
	2658	Maximum Number of Fish in a Grid	★★
	2659	Make Array Empty	★★★
	2660	Determine the Winner of a Bowling Game	★
	2661	First Completely Painted Row or Column	★★
	2662	Minimum Cost of a Path With Special Roads	★★
	2663	Lexicographically Smallest Beautiful String	★★★
	2670	Find the Distinct Difference Array	★
	2671	Frequency Tracker	★★
	2672	Number of Adjacent Elements With the Same Color	★★
	2673	Make Costs of Paths Equal in a Binary Tree	★★
	2678	Number of Senior Citizens	★
	2679	Sum in a Matrix	★★
	2680	Maximum OR	★★
	2681	Power of Heroes	★★★
	2682	Find the Losers of the Circular Game	★
	2683	Neighboring Bitwise XOR	★★
	2684	Maximum Number of Moves in a Grid	★★
	2685	Count the Number of Complete Components	★★
	2696	Minimum String Length After Removing Substrings	★
	2697	Lexicographically Smallest Palindrome	★
	2698	Find the Punishment Number of an Integer	★★
	2699	Modify Graph Edge Weights	★★★
	2706	Buy Two Chocolates	★
	2707	Extra Characters in a String	★★
	2708	Maximum Strength of a Group	★★
	2709	Greatest Common Divisor Traversal	★★★
	2710	Remove Trailing Zeros From a String	★
	2711	Difference of Number of Distinct Values on Diagonals	★★
	2712	Minimum Cost to Make All Characters Equal	★★
	2713	Maximum Strictly Increasing Cells in a Matrix	★★★
	2716	Minimize String Length	★
	2717	Semi-Ordered Permutation	★
	2718	Sum of Matrix After Queries	★★
	2719	Count of Integers	★★★
	2729	Check if The Number is Fascinating	★
	2730	Find the Longest Semi-Repetitive Substring	★★
	2731	Movement of Robots	★★
	2732	Find a Good Subset of the Matrix	★★★
	2733	Neither Minimum nor Maximum	★
	2734	Lexicographically Smallest String After Substring Operation	★★
	2735	Collecting Chocolates	★★
	2736	Maximum Sum Queries	★★★
	2739	Total Distance Traveled	★
	2740	Find the Value of the Partition	★★
	2741	Special Permutations	★★
	2742	Painting the Walls	★★★
	2744	Find Maximum Number of String Pairs	★
	2745	Construct the Longest New String	★★
	2746	Decremental String Concatenation	★★
	2747	Count Zero Request Servers	★★
	2748	Number of Beautiful Pairs	★
	2749	Minimum Operations to Make the Integer Zero	★★
	2750	Ways to Split Array Into Good Subarrays	★★
	2751	Robot Collisions	★★★
	2760	Longest Even Odd Subarray With Threshold	★
	2761	Prime Pairs With Target Sum	★★
	2762	Continuous Subarrays	★★
	2763	Sum of Imbalance Numbers of All Subarrays	★★★
	2765	Longest Alternating Subarray	★
	2766	Relocate Marbles	★★
	2767	Partition String Into Minimum Beautiful Substrings	★★
	2768	Number of Black Blocks	★★
	2769	Find the Maximum Achievable Number	★
	2770	Maximum Number of Jumps to Reach the Last Index	★★
	2771	Longest Non-decreasing Subarray From Two Arrays	★★
	2772	Apply Operations to Make All Array Elements Equal to Zero	★★
	2778	Sum of Squares of Special Elements	★
	2779	Maximum Beauty of an Array After Applying Operation	★★
	2780	Minimum Index of a Valid Split	★★
	2781	Length of the Longest Valid Substring	★★★
	2784	Check if Array is Good	★
	2785	Sort Vowels in a String	★★
	2786	Visit Array Positions to Maximize Score	★★
	2787	Ways to Express an Integer as Sum of Powers	★★
	2788	Split Strings by Separator	★
	2789	Largest Element in an Array after Merge Operations	★★
	2790	Maximum Number of Groups With Increasing Length	★★★
	2791	Count Paths That Can Form a Palindrome in a Tree	★★★
	2798	Number of Employees Who Met the Target	★
	2799	Count Complete Subarrays in an Array	★★
	2800	Shortest String That Contains Three Strings	★★
	2801	Count Stepping Numbers in Range	★★★
	2806	Account Balance After Rounded Purchase	★
	2807	Insert Greatest Common Divisors in Linked List	★★
	2808	Minimum Seconds to Equalize a Circular Array	★★
	2809	Minimum Time to Make Array Sum At Most x	★★★
	2810	Faulty Keyboard	★
	2811	Check if it is Possible to Split Array	★★
	2812	Find the Safest Path in a Grid	★★
	2813	Maximum Elegance of a K-Length Subsequence	★★★
	2815	Max Pair Sum in an Array	★
	2816	Double a Number Represented as a Linked List	★★
	2817	Minimum Absolute Difference Between Elements With Constraint	★★
	2818	Apply Operations to Maximize Score	★★★
	2824	Count Pairs Whose Sum is Less than Target	★
	2825	Make String a Subsequence Using Cyclic Increments	★★
	2826	Sorting Three Groups	★★
	2827	Number of Beautiful Integers in the Range	★★★
	2828	Check if a String Is an Acronym of Words	★
	2829	Determine the Minimum Sum of a k-avoiding Array	★★
	2830	Maximize the Profit as the Salesman	★★
	2831	Find the Longest Equal Subarray	★★
	2833	Furthest Point From Origin	★
	2834	Find the Minimum Possible Sum of a Beautiful Array	★★
	2835	Minimum Operations to Form Subsequence With Target Sum	★★★
	2836	Maximize Value of Function in a Ball Passing Game	★★★
	2839	Check if Strings Can be Made Equal With Operations I	★
	2840	Check if Strings Can be Made Equal With Operations II	★★
	2841	Maximum Sum of Almost Unique Subarray	★★
	2842	Count K-Subsequences of a String With Maximum Beauty	★★★
	2843	Count Symmetric Integers	★
	2844	Minimum Operations to Make a Special Number	★★
	2845	Count of Interesting Subarrays	★★
	2846	Minimum Edge Weight Equilibrium Queries in a Tree	★★★
	2848	Points That Intersect With Cars	★
	2849	Determine if a Cell Is Reachable at a Given Time	★★
	2850	Minimum Moves to Spread Stones Over Grid	★★
	2851	String Transformation	★★★
	2855	Minimum Right Shifts to Sort the Array	★
	2856	Minimum Array Length After Pair Removals	★★
	2857	Count Pairs of Points With Distance k	★★
	2858	Minimum Edge Reversals So Every Node Is Reachable	★★★
	2859	Sum of Values at Indices With K Set Bits	★
	2860	Happy Students	★★
	2861	Maximum Number of Alloys	★★
	2862	Maximum Element-Sum of a Complete Subset of Indices	★★★
	2864	Maximum Odd Binary Number	★
	2865	Beautiful Towers I	★★
	2866	Beautiful Towers II	★★
	2867	Count Valid Paths in a Tree	★★★
	2869	Minimum Operations to Collect Elements	★
	2870	Minimum Number of Operations to Make Array Empty	★★
	2871	Split Array Into Maximum Number of Subarrays	★★
	2872	Maximum Number of K-Divisible Components	★★★
	2873	Maximum Value of an Ordered Triplet I	★
	2874	Maximum Value of an Ordered Triplet II	★★
	2875	Minimum Size Subarray in Infinite Array	★★
	2876	Count Visited Nodes in a Directed Graph	★★★
	2894	Divisible and Non-divisible Sums Difference	★
	2895	Minimum Processing Time	★★
	2896	Apply Operations to Make Two Strings Equal	★★
	2897	Apply Operations on Array to Maximize Sum of Squares	★★★
	2899	Last Visited Integers	★
	2900	Longest Unequal Adjacent Groups Subsequence I	★
	2901	Longest Unequal Adjacent Groups Subsequence II	★★
	2902	Count of Sub-Multisets With Bounded Sum	★★★
	2903	Find Indices With Index and Value Difference I	★
	2904	Shortest and Lexicographically Smallest Beautiful String	★★
	2905	Find Indices With Index and Value Difference II	★★
	2906	Construct Product Matrix	★★
	2908	Minimum Sum of Mountain Triplets I	★
	2909	Minimum Sum of Mountain Triplets II	★★
	2910	Minimum Number of Groups to Create a Valid Assignment	★★
	2911	Minimum Changes to Make K Semi-palindromes	★★★
	2913	Subarrays Distinct Element Sum of Squares I	★
	2914	Minimum Number of Changes to Make Binary String Beautiful	★★
	2915	Length of the Longest Subsequence That Sums to Target	★★
	2916	Subarrays Distinct Element Sum of Squares II	★★★
	2917	Find the K-or of an Array	★
	2918	Minimum Equal Sum of Two Arrays After Replacing Zeros	★★
	2919	Minimum Increment Operations to Make Array Beautiful	★★
	2920	Maximum Points After Collecting Coins From All Nodes	★★★
	2923	Find Champion I	★
	2924	Find Champion II	★★
	2925	Maximum Score After Applying Operations on a Tree	★★
	2926	Maximum Balanced Subsequence Sum	★★★
	2928	Distribute Candies Among Children I	★
	2929	Distribute Candies Among Children II	★★
	2930	Number of Strings Which Can Be Rearranged to Contain Substring	★★
	2931	Maximum Spending After Buying Items	★★★
	2932	Maximum Strong Pair XOR I	★
	2933	High-Access Employees	★★
	2934	Minimum Operations to Maximize Last Elements in Arrays	★★
	2935	Maximum Strong Pair XOR II	★★★
	2937	Make Three Strings Equal	★
	2938	Separate Black and White Balls	★★
	2939	Maximum Xor Product	★★
	2940	Find Building Where Alice and Bob Can Meet	★★★
	2942	Find Words Containing Character	★
	2943	Maximize Area of Square Hole in Grid	★★
	2944	Minimum Number of Coins for Fruits	★★
	2945	Find Maximum Non-decreasing Array Length	★★★
	2946	Matrix Similarity After Cyclic Shifts	★
	2947	Count Beautiful Substrings I	★★
	2948	Make Lexicographically Smallest Array by Swapping Elements	★★
	2949	Count Beautiful Substrings II	★★★
	2951	Find the Peaks	★
	2952	Minimum Number of Coins to be Added	★★
	2953	Count Complete Substrings	★★★
	2954	Count the Number of Infection Sequences	★★★
	2956	Find Common Elements Between Two Arrays	★
	2957	Remove Adjacent Almost-Equal Characters	★★
	2958	Length of Longest Subarray With at Most K Frequency	★★
	2959	Number of Possible Sets of Closing Branches	★★★
	2960	Count Tested Devices After Test Operations	★
	2961	Double Modular Exponentiation	★★
	2962	Count Subarrays Where Max Element Appears at Least K Times	★★
	2963	Count the Number of Good Partitions	★★★
	2965	Find Missing and Repeated Values	★
	2966	Divide Array Into Arrays With Max Difference	★★
	2967	Minimum Cost to Make Array Equalindromic	★★
	2968	Apply Operations to Maximize Frequency Score	★★★
	2970	Count the Number of Incremovable Subarrays I	★
	2971	Find Polygon With the Largest Perimeter	★★
	2972	Count the Number of Incremovable Subarrays II	★★★
	2973	Find Number of Coins to Place in Tree Nodes	★★★
	2974	Minimum Number Game	★
	2975	Maximum Square Area by Removing Fences From a Field	★★
	2976	Minimum Cost to Convert String I	★★
	2977	Minimum Cost to Convert String II	★★★
	2980	Check if Bitwise OR Has Trailing Zeros	★
	2981	Find Longest Special Substring That Occurs Thrice I	★★
	2982	Find Longest Special Substring That Occurs Thrice II	★★
	2983	Palindrome Rearrangement Queries	★★★
	2996	Smallest Missing Integer Greater Than Sequential Prefix Sum	★
	2997	Minimum Number of Operations to Make Array XOR Equal to K	★★
	2998	Minimum Number of Operations to Make X and Y Equal	★★
	2999	Count the Number of Powerful Integers	★★★
	3000	Maximum Area of Longest Diagonal Rectangle	★
	3001	Minimum Moves to Capture The Queen	★★
	3002	Maximum Size of a Set After Removals	★★
	3003	Maximize the Number of Partitions After Operations	★★★
	3005	Count Elements With Maximum Frequency	★
	3006	Find Beautiful Indices in the Given Array I	★★
	3007	Maximum Number That Sum of the Prices Is Less Than or Equal to K	★★
	3008	Find Beautiful Indices in the Given Array II	★★★
	3010	Divide an Array Into Subarrays With Minimum Cost I	★
	3011	Find if Array Can Be Sorted	★★
	3012	Minimize Length of Array Using Operations	★★
	3013	Divide an Array Into Subarrays With Minimum Cost II	★★★
	3014	Minimum Number of Pushes to Type Word I	★
	3015	Count the Number of Houses at a Certain Distance I	★★
	3016	Minimum Number of Pushes to Type Word II	★★
	3017	Count the Number of Houses at a Certain Distance II	★★★
	3019	Number of Changing Keys	★
	3020	Find the Maximum Number of Elements in Subset	★★
	3021	Alice and Bob Playing Flower Game	★★
	3022	Minimize OR of Remaining Elements Using Operations	★★★
	3024	Type of Triangle	★
	3025	Find the Number of Ways to Place People I	★★
	3026	Maximum Good Subarray Sum	★★
	3027	Find the Number of Ways to Place People II	★★★
	3028	Ant on the Boundary	★
	3029	Minimum Time to Revert Word to Initial State I	★★
	3030	Find the Grid of Region Average	★★
	3031	Minimum Time to Revert Word to Initial State II	★★★
	3033	Modify the Matrix	★
	3034	Number of Subarrays That Match a Pattern I	★★
	3035	Maximum Palindromes After Operations	★★
	3036	Number of Subarrays That Match a Pattern II	★★★
	3038	Maximum Number of Operations With the Same Score I	★
	3039	Apply Operations to Make String Empty	★★
	3040	Maximum Number of Operations With the Same Score II	★★
	3041	Maximize Consecutive Elements in an Array After Modification	★★★
	3042	Count Prefix and Suffix Pairs I	★
	3043	Find the Length of the Longest Common Prefix	★★
	3044	Most Frequent Prime	★★
	3045	Count Prefix and Suffix Pairs II	★★★
	3046	Split the Array	★
	3047	Find the Largest Area of Square Inside Two Rectangles	★★
	3048	Earliest Second to Mark Indices I	★★
	3049	Earliest Second to Mark Indices II	★★★
	3065	Minimum Operations to Exceed Threshold Value I	★
	3066	Minimum Operations to Exceed Threshold Value II	★★
	3067	Count Pairs of Connectable Servers in a Weighted Tree Network	★★
	3068	Find the Maximum Sum of Node Values	★★★
	3069	Distribute Elements Into Two Arrays I	★
	3070	Count Submatrices with Top-Left Element and Sum Less Than k	★★
	3071	Minimum Operations to Write the Letter Y on a Grid	★★
	3072	Distribute Elements Into Two Arrays II	★★★
	3074	Apple Redistribution into Boxes	★
	3075	Maximize Happiness of Selected Children	★★
	3076	Shortest Uncommon Substring in an Array	★★
	3077	Maximum Strength of K Disjoint Subarrays	★★★
	3079	Find the Sum of Encrypted Integers	★
	3080	Mark Elements on Array by Performing Queries	★★
	3081	Replace Question Marks in String to Minimize Its Value	★★
	3082	Find the Sum of the Power of All Subsequences	★★★
	3083	Existence of a Substring in a String and Its Reverse	★
	3084	Count Substrings Starting and Ending with Given Character	★★
	3085	Minimum Deletions to Make String K-Special	★★
	3086	Minimum Moves to Pick K Ones	★★★
	3090	Maximum Length Substring With Two Occurrences	★
	3091	Apply Operations to Make Sum of Array Greater Than or Equal to k	★★
	3092	Most Frequent IDs	★★
	3093	Longest Common Suffix Queries	★★★
	3095	Shortest Subarray With OR at Least K I	★
	3096	Minimum Levels to Gain More Points	★★
	3097	Shortest Subarray With OR at Least K II	★★
	3098	Find the Sum of Subsequence Powers	★★★
	3099	Harshad Number	★
	3100	Water Bottles II	★★
	3101	Count Alternating Subarrays	★★
	3102	Minimize Manhattan Distances	★★★
	3105	Longest Strictly Increasing or Strictly Decreasing Subarray	★
	3106	Lexicographically Smallest String After Operations With Constraint	★★
	3107	Minimum Operations to Make Median of Array Equal to K	★★
	3108	Minimum Cost Walk in Weighted Graph	★★★
	3110	Score of a String	★
	3111	Minimum Rectangles to Cover Points	★★
	3112	Minimum Time to Visit Disappearing Nodes	★★
	3113	Find the Number of Subarrays Where Boundary Elements Are Maximum	★★★
	3114	Latest Time You Can Obtain After Replacing Characters	★
	3115	Maximum Prime Difference	★★
	3116	Kth Smallest Amount With Single Denomination Combination	★★★
	3117	Minimum Sum of Values by Dividing Array	★★★
	3120	Count the Number of Special Characters I	★
	3121	Count the Number of Special Characters II	★★
	3122	Minimum Number of Operations to Satisfy Conditions	★★
	3123	Find Edges in Shortest Paths	★★★
	3127	Make a Square with the Same Color	★
	3128	Right Triangles	★★
	3129	Find All Possible Stable Binary Arrays I	★★
	3130	Find All Possible Stable Binary Arrays II	★★★
	3131	Find the Integer Added to Array I	★
	3132	Find the Integer Added to Array II	★★
	3133	Minimum Array End	★★
	3134	Find the Median of the Uniqueness Array	★★★
	3136	Valid Word	★
	3137	Minimum Number of Operations to Make Word K-Periodic	★★
	3138	Minimum Length of Anagram Concatenation	★★
	3139	Minimum Cost to Equalize Array	★★★
	3142	Check if Grid Satisfies Conditions	★
	3143	Maximum Points Inside the Square	★★
	3144	Minimum Substring Partition of Equal Character Frequency	★★
	3145	Find Products of Elements of Big Array	★★★
	3146	Permutation Difference between Two Strings	★
	3147	Taking Maximum Energy From the Mystic Dungeon	★★
	3148	Maximum Difference Score in a Grid	★★
	3149	Find the Minimum Cost Array Permutation	★★★
	3151	Special Array I	★
	3152	Special Array II	★★
	3153	Sum of Digit Differences of All Pairs	★★
	3154	Find Number of Ways to Reach the K-th Stair	★★★
	3158	Find the XOR of Numbers Which Appear Twice	★
	3159	Find Occurrences of an Element in an Array	★★
	3160	Find the Number of Distinct Colors Among the Balls	★★
	3161	Block Placement Queries	★★★
	3162	Find the Number of Good Pairs I	★
	3163	String Compression III	★★
	3164	Find the Number of Good Pairs II	★★
	3165	Maximum Sum of Subsequence With Non-adjacent Elements	★★★
	3168	Minimum Number of Chairs in a Waiting Room	★
	3169	Count Days Without Meetings	★★
	3170	Lexicographically Minimum String After Removing Stars	★★
	3171	Find Subarray With Bitwise OR Closest to K	★★★
	3174	Clear Digits	★
	3175	Find The First Player to win K Games in a Row	★★
	3176	Find the Maximum Length of a Good Subsequence I	★★
	3177	Find the Maximum Length of a Good Subsequence II	★★★
	3178	Find the Child Who Has the Ball After K Seconds	★
	3179	Find the N-th Value After K Seconds	★★
	3180	Maximum Total Reward Using Operations I	★★
	3181	Maximum Total Reward Using Operations II	★★★
	3184	Count Pairs That Form a Complete Day I	★
	3185	Count Pairs That Form a Complete Day II	★★
	3186	Maximum Total Damage With Spell Casting	★★
	3187	Peaks in Array	★★★
	3190	Find Minimum Operations to Make All Elements Divisible by Three	★
	3191	Minimum Operations to Make Binary Array Elements Equal to One I	★★
	3192	Minimum Operations to Make Binary Array Elements Equal to One II	★★
	3193	Count the Number of Inversions	★★★
	3194	Minimum Average of Smallest and Largest Elements	★
	3195	Find the Minimum Area to Cover All Ones I	★★
	3196	Maximize Total Cost of Alternating Subarrays	★★
	3197	Find the Minimum Area to Cover All Ones II	★★★
	3200	Maximum Height of a Triangle	★
	3201	Find the Maximum Length of Valid Subsequence I	★★
	3202	Find the Maximum Length of Valid Subsequence II	★★
	3203	Find Minimum Diameter After Merging Two Trees	★★★
	3206	Alternating Groups I	★
	3207	Maximum Points After Enemy Battles	★★
	3208	Alternating Groups II	★★
	3209	Number of Subarrays With AND Value of K	★★★
	3210	Find the Encrypted String	★
	3211	Generate Binary Strings Without Adjacent Zeros	★★
	3212	Count Submatrices With Equal Frequency of X and Y	★★
	3213	Construct String with Minimum Cost	★★★
	3216	Lexicographically Smallest String After a Swap	★
	3217	Delete Nodes From Linked List Present in Array	★★
	3218	Minimum Cost for Cutting Cake I	★★
	3219	Minimum Cost for Cutting Cake II	★★★
	3222	Find the Winning Player in Coin Game	★
	3223	Minimum Length of String After Operations	★★
	3224	Minimum Array Changes to Make Differences Equal	★★
	3225	Maximum Score From Grid Operations	★★★
	3226	Number of Bit Changes to Make Two Integers Equal	★
	3227	Vowels Game in a String	★★
	3228	Maximum Number of Operations to Move Ones to the End	★★
	3229	Minimum Operations to Make Array Equal to Target	★★★
	3232	Find if Digit Game Can Be Won	★
	3233	Find the Count of Numbers Which Are Not Special	★★
	3234	Count the Number of Substrings With Dominant Ones	★★
	3235	Check if the Rectangle Corner Is Reachable	★★★
	3238	Find the Number of Winning Players	★
	3239	Minimum Number of Flips to Make Binary Grid Palindromic I	★★
	3240	Minimum Number of Flips to Make Binary Grid Palindromic II	★★
	3241	Time Taken to Mark All Nodes	★★★
	3242	Design Neighbor Sum Service	★
	3243	Shortest Distance After Road Addition Queries I	★★
	3244	Shortest Distance After Road Addition Queries II	★★★
	3245	Alternating Groups III	★★★
	3248	Snake in Matrix	★
	3249	Count the Number of Good Nodes	★★
	3250	Find the Count of Monotonic Pairs I	★★★
	3251	Find the Count of Monotonic Pairs II	★★★
	3254	Find the Power of K-Size Subarrays I	★★
	3255	Find the Power of K-Size Subarrays II	★★
	3256	Maximum Value Sum by Placing Three Rooks I	★★★
	3257	Maximum Value Sum by Placing Three Rooks II	★★★
	3258	Count Substrings That Satisfy K-Constraint I	★
	3259	Maximum Energy Boost From Two Drinks	★★
	3260	Find the Largest Palindrome Divisible by K	★★★
	3261	Count Substrings That Satisfy K-Constraint II	★★★
	3264	Final Array State After K Multiplication Operations I	★
	3265	Count Almost Equal Pairs I	★★
	3266	Final Array State After K Multiplication Operations II	★★★
	3267	Count Almost Equal Pairs II	★★★
	3270	Find the Key of the Numbers	★
	3271	Hash Divided String	★★
	3272	Find the Count of Good Integers	★★★
	3273	Minimum Amount of Damage Dealt to Bob	★★★
	3274	Check if Two Chessboard Squares Have the Same Color	★
	3275	K-th Nearest Obstacle Queries	★★
	3276	Select Cells in Grid With Maximum Score	★★★
	3277	Maximum XOR Score Subarray Queries	★★★
	3280	Convert Date to Binary	★
	3281	Maximize Score of Numbers in Ranges	★★
	3282	Reach End of Array With Max Score	★★
	3283	Maximum Number of Moves to Kill All Pawns	★★★
	3285	Find Indices of Stable Mountains	★
	3286	Find a Safe Walk Through a Grid	★★
	3287	Find the Maximum Sequence Value of Array	★★★
	3288	Length of the Longest Increasing Path	★★★
	3289	The Two Sneaky Numbers of Digitville	★
	3290	Maximum Multiplication Score	★★
	3291	Minimum Number of Valid Strings to Form Target I	★★
	3292	Minimum Number of Valid Strings to Form Target II	★★★
	3295	Report Spam Message	★★
	3296	Minimum Number of Seconds to Make Mountain Height Zero	★★
	3297	Count Substrings That Can Be Rearranged to Contain a String I	★★
	3298	Count Substrings That Can Be Rearranged to Contain a String II	★★★
	3300	Minimum Element After Replacement With Digit Sum	★
	3301	Maximize the Total Height of Unique Towers	★★
	3302	Find the Lexicographically Smallest Valid Sequence	★★
	3303	Find the Occurrence of First Almost Equal Substring	★★★
	3304	Find the K-th Character in String Game I	★
	3305	Count of Substrings Containing Every Vowel and K Consonants I	★★
	3306	Count of Substrings Containing Every Vowel and K Consonants II	★★
	3307	Find the K-th Character in String Game II	★★★
	3309	Maximum Possible Number by Binary Concatenation	★★
	3310	Remove Methods From Project	★★
	3311	Construct 2D Grid Matching Graph Layout	★★★
	3312	Sorted GCD Pair Queries	★★★
	3314	Construct the Minimum Bitwise Array I	★
	3315	Construct the Minimum Bitwise Array II	★★
	3316	Find Maximum Removals From Source String	★★
	3317	Find the Number of Possible Ways for an Event	★★★
	3318	Find X-Sum of All K-Long Subarrays I	★
	3319	K-th Largest Perfect Subtree Size in Binary Tree	★★
	3320	Count The Number of Winning Sequences	★★★
	3321	Find X-Sum of All K-Long Subarrays II	★★★
	3324	Find the Sequence of Strings Appeared on the Screen	★★
	3325	Count Substrings With K-Frequency Characters I	★★
	3326	Minimum Division Operations to Make Array Non Decreasing	★★
	3327	Check if DFS Strings Are Palindromes	★★★
	3330	Find the Original Typed String I	★
	3331	Find Subtree Sizes After Changes	★★
	3332	Maximum Points Tourist Can Earn	★★
	3333	Find the Original Typed String II	★★★
	3334	Find the Maximum Factor Score of Array	★★
	3335	Total Characters in String After Transformations I	★★
	3336	Find the Number of Subsequences With Equal GCD	★★★
	3337	Total Characters in String After Transformations II	★★★
	3340	Check Balanced String	★
	3341	Find Minimum Time to Reach Last Room I	★★
	3342	Find Minimum Time to Reach Last Room II	★★
	3343	Count Number of Balanced Permutations	★★★
	3345	Smallest Divisible Digit Product I	★
	3346	Maximum Frequency of an Element After Performing Operations I	★★
	3347	Maximum Frequency of an Element After Performing Operations II	★★★
	3348	Smallest Divisible Digit Product II	★★★
	3349	Adjacent Increasing Subarrays Detection I	★
	3350	Adjacent Increasing Subarrays Detection II	★★
	3351	Sum of Good Subsequences	★★★
	3352	Count K-Reducible Numbers Less Than N	★★★
	3354	Make Array Elements Equal to Zero	★
	3355	Zero Array Transformation I	★★
	3356	Zero Array Transformation II	★★
	3357	Minimize the Maximum Adjacent Element Difference	★★★
	3360	Stone Removal Game	★
	3361	Shift Distance Between Two Strings	★★
	3362	Zero Array Transformation III	★★
	3363	Find the Maximum Number of Fruits Collected	★★★
	3364	Minimum Positive Sum Subarray	★
	3365	Rearrange K Substrings to Form Target String	★★
	3366	Minimum Array Sum	★★
	3367	Maximize Sum of Weights after Edge Removals	★★★
	3370	Smallest Number With All Set Bits	★
	3371	Identify the Largest Outlier in an Array	★★
	3372	Maximize the Number of Target Nodes After Connecting Trees I	★★
	3373	Maximize the Number of Target Nodes After Connecting Trees II	★★★