2,750+ LeetCode solutions in JavaScript

https://leetcodejavascript.com

Table of Contents:

#	Title	Difficulty
1	Two Sum	Easy
2	Add Two Numbers	Medium
3	Longest Substring Without Repeating Characters	Medium
4	Median of Two Sorted Arrays	Hard
5	Longest Palindromic Substring	Medium
6	ZigZag Conversion	Medium
7	Reverse Integer	Easy
8	String to Integer (atoi)	Medium
9	Palindrome Number	Easy
10	Regular Expression Matching	Hard
11	Container With Most Water	Medium
12	Integer to Roman	Medium
13	Roman to Integer	Easy
14	Longest Common Prefix	Easy
15	3Sum	Medium
16	3Sum Closest	Medium
17	Letter Combinations of a Phone Number	Medium
18	4Sum	Medium
19	Remove Nth Node From End of List	Medium
20	Valid Parentheses	Easy
21	Merge Two Sorted Lists	Easy
22	Generate Parentheses	Medium
23	Merge k Sorted Lists	Hard
24	Swap Nodes in Pairs	Medium
25	Reverse Nodes in k-Group	Hard
26	Remove Duplicates from Sorted Array	Easy
27	Remove Element	Easy
28	Implement strStr()	Easy
29	Divide Two Integers	Medium
30	Substring with Concatenation of All Words	Hard
31	Next Permutation	Medium
32	Longest Valid Parentheses	Hard
33	Search in Rotated Sorted Array	Medium
34	Find First and Last Position of Element in Sorted Array	Medium
35	Search Insert Position	Easy
36	Valid Sudoku	Medium
37	Sudoku Solver	Hard
38	Count and Say	Medium
39	Combination Sum	Medium
40	Combination Sum II	Medium
41	First Missing Positive	Hard
42	Trapping Rain Water	Hard
43	Multiply Strings	Medium
44	Wildcard Matching	Hard
45	Jump Game II	Medium
46	Permutations	Medium
47	Permutations II	Medium
48	Rotate Image	Medium
49	Group Anagrams	Medium
50	Pow(x, n)	Medium
51	N-Queens	Hard
52	N-Queens II	Hard
53	Maximum Subarray	Easy
54	Spiral Matrix	Medium
55	Jump Game	Medium
56	Merge Intervals	Medium
57	Insert Interval	Medium
58	Length of Last Word	Easy
59	Spiral Matrix II	Medium
60	Permutation Sequence	Hard
61	Rotate List	Medium
62	Unique Paths	Medium
63	Unique Paths II	Medium
64	Minimum Path Sum	Medium
65	Valid Number	Hard
66	Plus One	Easy
67	Add Binary	Easy
68	Text Justification	Hard
69	Sqrt(x)	Medium
70	Climbing Stairs	Easy
71	Simplify Path	Medium
72	Edit Distance	Medium
73	Set Matrix Zeroes	Medium
74	Search a 2D Matrix	Medium
75	Sort Colors	Medium
76	Minimum Window Substring	Hard
77	Combinations	Medium
78	Subsets	Medium
79	Word Search	Medium
80	Remove Duplicates from Sorted Array II	Medium
81	Search in Rotated Sorted Array II	Medium
82	Remove Duplicates from Sorted List II	Medium
83	Remove Duplicates from Sorted List	Easy
84	Largest Rectangle in Histogram	Hard
85	Maximal Rectangle	Hard
86	Partition List	Medium
87	Scramble String	Hard
88	Merge Sorted Array	Easy
89	Gray Code	Medium
90	Subsets II	Medium
91	Decode Ways	Medium
92	Reverse Linked List II	Medium
93	Restore IP Addresses	Medium
94	Binary Tree Inorder Traversal	Easy
95	Unique Binary Search Trees II	Medium
96	Unique Binary Search Trees	Medium
97	Interleaving String	Medium
98	Validate Binary Search Tree	Medium
99	Recover Binary Search Tree	Medium
100	Same Tree	Easy
101	Symmetric Tree	Easy
102	Binary Tree Level Order Traversal	Medium
103	Binary Tree Zigzag Level Order Traversal	Medium
104	Maximum Depth of Binary Tree	Easy
105	Construct Binary Tree from Preorder and Inorder Traversal	Medium
106	Construct Binary Tree from Inorder and Postorder Traversal	Medium
107	Binary Tree Level Order Traversal II	Medium
108	Convert Sorted Array to Binary Search Tree	Easy
109	Convert Sorted List to Binary Search Tree	Medium
110	Balanced Binary Tree	Easy
111	Minimum Depth of Binary Tree	Easy
112	Path Sum	Easy
113	Path Sum II	Medium
114	Flatten Binary Tree to Linked List	Medium
115	Distinct Subsequences	Hard
116	Populating Next Right Pointers in Each Node	Medium
117	Populating Next Right Pointers in Each Node II	Medium
118	Pascal's Triangle	Easy
119	Pascal's Triangle II	Easy
120	Triangle	Medium
121	Best Time to Buy and Sell Stock	Easy
122	Best Time to Buy and Sell Stock II	Medium
123	Best Time to Buy and Sell Stock III	Hard
124	Binary Tree Maximum Path Sum	Hard
125	Valid Palindrome	Easy
126	Word Ladder II	Hard
127	Word Ladder	Hard
128	Longest Consecutive Sequence	Medium
129	Sum Root to Leaf Numbers	Medium
130	Surrounded Regions	Medium
131	Palindrome Partitioning	Medium
132	Palindrome Partitioning II	Hard
133	Clone Graph	Medium
134	Gas Station	Medium
135	Candy	Hard
136	Single Number	Easy
137	Single Number II	Medium
138	Copy List with Random Pointer	Medium
139	Word Break	Medium
140	Word Break II	Hard
141	Linked List Cycle	Easy
142	Linked List Cycle II	Medium
143	Reorder List	Medium
144	Binary Tree Preorder Traversal	Easy
145	Binary Tree Postorder Traversal	Easy
146	LRU Cache	Medium
147	Insertion Sort List	Medium
148	Sort List	Medium
149	Max Points on a Line	Hard
150	Evaluate Reverse Polish Notation	Medium
151	Reverse Words in a String	Medium
152	Maximum Product Subarray	Medium
153	Find Minimum in Rotated Sorted Array	Medium
154	Find Minimum in Rotated Sorted Array II	Hard
155	Min Stack	Medium
156	Binary Tree Upside Down	Medium
157	Read N Characters Given Read4	Easy
158	Read N Characters Given read4 II - Call Multiple Times	Hard
159	Longest Substring with At Most Two Distinct Characters	Medium
160	Intersection of Two Linked Lists	Medium
161	One Edit Distance	Medium
162	Find Peak Element	Medium
163	Missing Ranges	Easy
164	Maximum Gap	Medium
165	Compare Version Numbers	Medium
166	Fraction to Recurring Decimal	Medium
167	Two Sum II - Input Array Is Sorted	Easy
168	Excel Sheet Column Title	Easy
169	Majority Element	Easy
170	Two Sum III - Data structure design	Easy
171	Excel Sheet Column Number	Easy
172	Factorial Trailing Zeroes	Medium
173	Binary Search Tree Iterator	Medium
174	Dungeon Game	Hard
179	Largest Number	Medium
186	Reverse Words in a String II	Medium
187	Repeated DNA Sequences	Medium
188	Best Time to Buy and Sell Stock IV	Hard
189	Rotate Array	Medium
190	Reverse Bits	Easy
191	Number of 1 Bits	Easy
198	House Robber	Medium
199	Binary Tree Right Side View	Medium
200	Number of Islands	Medium
201	Bitwise AND of Numbers Range	Medium
202	Happy Number	Easy
203	Remove Linked List Elements	Easy
204	Count Primes	Medium
205	Isomorphic Strings	Easy
206	Reverse Linked List	Easy
207	Course Schedule	Medium
208	Implement Trie (Prefix Tree)	Medium
209	Minimum Size Subarray Sum	Medium
210	Course Schedule II	Medium
211	Design Add and Search Words Data Structure	Medium
212	Word Search II	Hard
213	House Robber II	Medium
214	Shortest Palindrome	Hard
215	Kth Largest Element in an Array	Medium
216	Combination Sum III	Medium
217	Contains Duplicate	Easy
218	The Skyline Problem	Hard
219	Contains Duplicate II	Easy
220	Contains Duplicate III	Hard
221	Maximal Square	Medium
222	Count Complete Tree Nodes	Easy
223	Rectangle Area	Medium
224	Basic Calculator	Hard
225	Implement Stack using Queues	Easy
226	Invert Binary Tree	Easy
227	Basic Calculator II	Medium
228	Summary Ranges	Easy
229	Majority Element II	Medium
230	Kth Smallest Element in a BST	Medium
231	Power of Two	Easy
232	Implement Queue using Stacks	Easy
233	Number of Digit One	Hard
234	Palindrome Linked List	Easy
235	Lowest Common Ancestor of a Binary Search Tree	Easy
236	Lowest Common Ancestor of a Binary Tree	Medium
237	Delete Node in a Linked List	Easy
238	Product of Array Except Self	Medium
239	Sliding Window Maximum	Hard
240	Search a 2D Matrix II	Medium
241	Different Ways to Add Parentheses	Medium
242	Valid Anagram	Easy
243	Shortest Word Distance	Easy
244	Shortest Word Distance II	Medium
245	Shortest Word Distance III	Medium
246	Strobogrammatic Number	Easy
247	Strobogrammatic Number II	Medium
248	Strobogrammatic Number III	Hard
249	Group Shifted Strings	Medium
250	Count Univalue Subtrees	Medium
251	Flatten 2D Vector	Medium
252	Meeting Rooms	Easy
253	Meeting Rooms II	Medium
254	Factor Combinations	Medium
255	Verify Preorder Sequence in Binary Search Tree	Medium
256	Paint House	Medium
257	Binary Tree Paths	Easy
258	Add Digits	Easy
259	3Sum Smaller	Medium
260	Single Number III	Medium
261	Graph Valid Tree	Medium
263	Ugly Number	Easy
264	Ugly Number II	Medium
265	Paint House II	Hard
266	Palindrome Permutation	Easy
267	Palindrome Permutation II	Medium
268	Missing Number	Easy
269	Alien Dictionary	Hard
270	Closest Binary Search Tree Value	Easy
271	Encode and Decode Strings	Medium
272	Closest Binary Search Tree Value II	Hard
273	Integer to English Words	Hard
274	H-Index	Medium
275	H-Index II	Medium
276	Paint Fence	Medium
277	Find the Celebrity	Medium
278	First Bad Version	Medium
279	Perfect Squares	Medium
280	Wiggle Sort	Medium
281	Zigzag Iterator	Medium
282	Expression Add Operators	Hard
283	Move Zeroes	Easy
284	Peeking Iterator	Medium
285	Inorder Successor in BST	Medium
286	Walls and Gates	Medium
287	Find the Duplicate Number	Medium
288	Unique Word Abbreviation	Medium
289	Game of Life	Medium
290	Word Pattern	Easy
291	Word Pattern II	Medium
292	Nim Game	Easy
293	Flip Game	Easy
294	Flip Game II	Medium
295	Find Median from Data Stream	Hard
296	Best Meeting Point	Hard
297	Serialize and Deserialize Binary Tree	Hard
298	Binary Tree Longest Consecutive Sequence	Medium
299	Bulls and Cows	Medium
300	Longest Increasing Subsequence	Medium
301	Remove Invalid Parentheses	Hard
302	Smallest Rectangle Enclosing Black Pixels	Hard
303	Range Sum Query - Immutable	Easy
304	Range Sum Query 2D - Immutable	Medium
305	Number of Islands II	Hard
306	Additive Number	Medium
307	Range Sum Query - Mutable	Medium
308	Range Sum Query 2D - Mutable	Medium
309	Best Time to Buy and Sell Stock with Cooldown	Medium
310	Minimum Height Trees	Medium
311	Sparse Matrix Multiplication	Medium
312	Burst Balloons	Hard
313	Super Ugly Number	Medium
314	Binary Tree Vertical Order Traversal	Medium
315	Count of Smaller Numbers After Self	Hard
316	Remove Duplicate Letters	Medium
317	Shortest Distance from All Buildings	Hard
318	Maximum Product of Word Lengths	Medium
319	Bulb Switcher	Medium
320	Generalized Abbreviation	Medium
321	Create Maximum Number	Hard
322	Coin Change	Medium
323	Number of Connected Components in an Undirected Graph	Medium
324	Wiggle Sort II	Medium
325	Maximum Size Subarray Sum Equals k	Medium
326	Power of Three	Easy
327	Count of Range Sum	Hard
328	Odd Even Linked List	Medium
329	Longest Increasing Path in a Matrix	Hard
330	Patching Array	Hard
331	Verify Preorder Serialization of a Binary Tree	Medium
332	Reconstruct Itinerary	Hard
333	Largest BST Subtree	Medium
334	Increasing Triplet Subsequence	Medium
335	Self Crossing	Hard
336	Palindrome Pairs	Hard
337	House Robber III	Medium
338	Counting Bits	Easy
339	Nested List Weight Sum	Medium
340	Longest Substring with At Most K Distinct Characters	Medium
341	Flatten Nested List Iterator	Medium
342	Power of Four	Easy
343	Integer Break	Medium
344	Reverse String	Easy
345	Reverse Vowels of a String	Easy
346	Moving Average from Data Stream	Easy
347	Top K Frequent Elements	Medium
348	Design Tic-Tac-Toe	Medium
349	Intersection of Two Arrays	Easy
350	Intersection of Two Arrays II	Easy
351	Android Unlock Patterns	Medium
352	Data Stream as Disjoint Intervals	Hard
353	Design Snake Game	Medium
354	Russian Doll Envelopes	Hard
355	Design Twitter	Medium
356	Line Reflection	Medium
357	Count Numbers with Unique Digits	Medium
358	Rearrange String k Distance Apart	Hard
359	Logger Rate Limiter	Easy
360	Sort Transformed Array	Medium
361	Bomb Enemy	Medium
362	Design Hit Counter	Medium
363	Max Sum of Rectangle No Larger Than K	Hard
364	Nested List Weight Sum II	Medium
365	Water and Jug Problem	Medium
366	Find Leaves of Binary Tree	Medium
367	Valid Perfect Square	Easy
368	Largest Divisible Subset	Medium
369	Plus One Linked List	Medium
370	Range Addition	Medium
371	Sum of Two Integers	Medium
372	Super Pow	Medium
373	Find K Pairs with Smallest Sums	Medium
374	Guess Number Higher or Lower	Medium
375	Guess Number Higher or Lower II	Medium
376	Wiggle Subsequence	Medium
377	Combination Sum IV	Medium
378	Kth Smallest Element in a Sorted Matrix	Medium
379	Design Phone Directory	Medium
380	Insert Delete GetRandom O(1)	Medium
381	Insert Delete GetRandom O(1) - Duplicates allowed	Hard
382	Linked List Random Node	Medium
383	Ransom Note	Easy
384	Shuffle an Array	Medium
385	Mini Parser	Medium
386	Lexicographical Numbers	Medium
387	First Unique Character in a String	Easy
388	Longest Absolute File Path	Medium
389	Find the Difference	Easy
390	Elimination Game	Medium
391	Perfect Rectangle	Hard
392	Is Subsequence	Easy
393	UTF-8 Validation	Medium
394	Decode String	Medium
395	Longest Substring with At Least K Repeating Characters	Medium
396	Rotate Function	Medium
397	Integer Replacement	Medium
398	Random Pick Index	Medium
399	Evaluate Division	Medium
400	Nth Digit	Medium
401	Binary Watch	Easy
402	Remove K Digits	Medium
403	Frog Jump	Hard
404	Sum of Left Leaves	Easy
405	Convert a Number to Hexadecimal	Easy
406	Queue Reconstruction by Height	Medium
407	Trapping Rain Water II	Hard
408	Valid Word Abbreviation	Easy
409	Longest Palindrome	Easy
410	Split Array Largest Sum	Hard
411	Minimum Unique Word Abbreviation	Hard
412	Fizz Buzz	Easy
413	Arithmetic Slices	Medium
414	Third Maximum Number	Easy
415	Add Strings	Easy
416	Partition Equal Subset Sum	Medium
417	Pacific Atlantic Water Flow	Medium
418	Sentence Screen Fitting	Medium
419	Battleships in a Board	Medium
420	Strong Password Checker	Hard
421	Maximum XOR of Two Numbers in an Array	Medium
422	Valid Word Square	Easy
423	Reconstruct Original Digits from English	Medium
424	Longest Repeating Character Replacement	Medium
425	Word Squares	Hard
426	Convert Binary Search Tree to Sorted Doubly Linked List	Medium
427	Construct Quad Tree	Medium
428	Serialize and Deserialize N-ary Tree	Hard
429	N-ary Tree Level Order Traversal	Medium
430	Flatten a Multilevel Doubly Linked List	Medium
431	Encode N-ary Tree to Binary Tree	Hard
432	All O`one Data Structure	Hard
433	Minimum Genetic Mutation	Medium
434	Number of Segments in a String	Easy
435	Non-overlapping Intervals	Medium
436	Find Right Interval	Medium
437	Path Sum III	Medium
438	Find All Anagrams in a String	Medium
439	Ternary Expression Parser	Medium
440	K-th Smallest in Lexicographical Order	Hard
441	Arranging Coins	Easy
442	Find All Duplicates in an Array	Medium
443	String Compression	Medium
444	Sequence Reconstruction	Medium
445	Add Two Numbers II	Medium
446	Arithmetic Slices II - Subsequence	Hard
447	Number of Boomerangs	Medium
448	Find All Numbers Disappeared in an Array	Easy
449	Serialize and Deserialize BST	Medium
450	Delete Node in a BST	Medium
451	Sort Characters By Frequency	Medium
452	Minimum Number of Arrows to Burst Balloons	Medium
453	Minimum Moves to Equal Array Elements	Medium
454	4Sum II	Medium
455	Assign Cookies	Easy
456	132 Pattern	Medium
457	Circular Array Loop	Medium
458	Poor Pigs	Hard
459	Repeated Substring Pattern	Easy
460	LFU Cache	Hard
461	Hamming Distance	Easy
462	Minimum Moves to Equal Array Elements II	Medium
463	Island Perimeter	Medium
464	Can I Win	Medium
465	Optimal Account Balancing	Hard
466	Count The Repetitions	Hard
467	Unique Substrings in Wraparound String	Medium
468	Validate IP Address	Medium
469	Convex Polygon	Medium
470	Implement Rand10() Using Rand7()	Medium
471	Encode String with Shortest Length	Hard
472	Concatenated Words	Hard
473	Matchsticks to Square	Medium
474	Ones and Zeroes	Medium
475	Heaters	Medium
476	Number Complement	Easy
477	Total Hamming Distance	Medium
478	Generate Random Point in a Circle	Medium
479	Largest Palindrome Product	Hard
480	Sliding Window Median	Hard
481	Magical String	Medium
482	License Key Formatting	Easy
483	Smallest Good Base	Hard
484	Find Permutation	Medium
485	Max Consecutive Ones	Easy
486	Predict the Winner	Medium
487	Max Consecutive Ones II	Medium
488	Zuma Game	Hard
489	Robot Room Cleaner	Hard
490	The Maze	Medium
491	Non-decreasing Subsequences	Medium
492	Construct the Rectangle	Easy
493	Reverse Pairs	Hard
494	Target Sum	Medium
495	Teemo Attacking	Easy
496	Next Greater Element I	Easy
497	Random Point in Non-overlapping Rectangles	Medium
498	Diagonal Traverse	Medium
499	The Maze III	Hard
500	Keyboard Row	Easy
501	Find Mode in Binary Search Tree	Easy
502	IPO	Hard
503	Next Greater Element II	Medium
504	Base 7	Easy
505	The Maze II	Medium
506	Relative Ranks	Easy
507	Perfect Number	Easy
508	Most Frequent Subtree Sum	Medium
509	Fibonacci Number	Easy
510	Inorder Successor in BST II	Medium
513	Find Bottom Left Tree Value	Medium
514	Freedom Trail	Hard
515	Find Largest Value in Each Tree Row	Medium
516	Longest Palindromic Subsequence	Medium
517	Super Washing Machines	Hard
518	Coin Change II	Medium
519	Random Flip Matrix	Medium
520	Detect Capital	Easy
521	Longest Uncommon Subsequence I	Easy
522	Longest Uncommon Subsequence II	Medium
523	Continuous Subarray Sum	Medium
524	Longest Word in Dictionary through Deleting	Medium
525	Contiguous Array	Medium
526	Beautiful Arrangement	Medium
527	Word Abbreviation	Hard
528	Random Pick with Weight	Medium
529	Minesweeper	Medium
530	Minimum Absolute Difference in BST	Easy
531	Lonely Pixel I	Medium
532	K-diff Pairs in an Array	Medium
533	Lonely Pixel II	Medium
535	Encode and Decode TinyURL	Medium
536	Construct Binary Tree from String	Medium
537	Complex Number Multiplication	Medium
538	Convert BST to Greater Tree	Medium
539	Minimum Time Difference	Medium
540	Single Element in a Sorted Array	Medium
541	Reverse String II	Easy
542	01 Matrix	Medium
543	Diameter of Binary Tree	Easy
544	Output Contest Matches	Medium
545	Boundary of Binary Tree	Medium
546	Remove Boxes	Hard
547	Number of Provinces	Medium
548	Split Array with Equal Sum	Hard
549	Binary Tree Longest Consecutive Sequence II	Medium
551	Student Attendance Record I	Easy
552	Student Attendance Record II	Hard
553	Optimal Division	Medium
554	Brick Wall	Medium
555	Split Concatenated Strings	Medium
556	Next Greater Element III	Medium
557	Reverse Words in a String III	Easy
558	Logical OR of Two Binary Grids Represented as Quad-Trees	Medium
559	Maximum Depth of N-ary Tree	Easy
560	Subarray Sum Equals K	Medium
561	Array Partition	Easy
562	Longest Line of Consecutive One in Matrix	Medium
563	Binary Tree Tilt	Easy
564	Find the Closest Palindrome	Hard
565	Array Nesting	Medium
566	Reshape the Matrix	Easy
567	Permutation in String	Medium
568	Maximum Vacation Days	Hard
572	Subtree of Another Tree	Easy
573	Squirrel Simulation	Medium
575	Distribute Candies	Easy
576	Out of Boundary Paths	Medium
581	Shortest Unsorted Continuous Subarray	Medium
582	Kill Process	Medium
583	Delete Operation for Two Strings	Medium
587	Erect the Fence	Hard
588	Design In-Memory File System	Hard
589	N-ary Tree Preorder Traversal	Easy
590	N-ary Tree Postorder Traversal	Easy
591	Tag Validator	Hard
592	Fraction Addition and Subtraction	Medium
593	Valid Square	Medium
594	Longest Harmonious Subsequence	Easy
598	Range Addition II	Easy
599	Minimum Index Sum of Two Lists	Easy
600	Non-negative Integers without Consecutive Ones	Hard
604	Design Compressed String Iterator	Easy
605	Can Place Flowers	Easy
606	Construct String from Binary Tree	Easy
609	Find Duplicate File in System	Medium
611	Valid Triangle Number	Medium
616	Add Bold Tag in String	Medium
617	Merge Two Binary Trees	Easy
621	Task Scheduler	Medium
622	Design Circular Queue	Medium
623	Add One Row to Tree	Medium
624	Maximum Distance in Arrays	Medium
625	Minimum Factorization	Medium
628	Maximum Product of Three Numbers	Easy
629	K Inverse Pairs Array	Hard
630	Course Schedule III	Hard
631	Design Excel Sum Formula	Hard
632	Smallest Range Covering Elements from K Lists	Hard
633	Sum of Square Numbers	Medium
634	Find the Derangement of An Array	Medium
635	Design Log Storage System	Medium
636	Exclusive Time of Functions	Medium
637	Average of Levels in Binary Tree	Easy
638	Shopping Offers	Medium
639	Decode Ways II	Hard
640	Solve the Equation	Medium
641	Design Circular Deque	Medium
642	Design Search Autocomplete System	Hard
643	Maximum Average Subarray I	Easy
644	Maximum Average Subarray II	Hard
645	Set Mismatch	Medium
646	Maximum Length of Pair Chain	Medium
647	Palindromic Substrings	Medium
648	Replace Words	Medium
649	Dota2 Senate	Medium
650	2 Keys Keyboard	Medium
651	4 Keys Keyboard	Medium
652	Find Duplicate Subtrees	Medium
653	Two Sum IV - Input is a BST	Easy
654	Maximum Binary Tree	Medium
655	Print Binary Tree	Medium
656	Coin Path	Hard
657	Robot Return to Origin	Easy
658	Find K Closest Elements	Medium
659	Split Array into Consecutive Subsequences	Medium
660	Remove 9	Hard
661	Image Smoother	Easy
662	Maximum Width of Binary Tree	Medium
663	Equal Tree Partition	Medium
664	Strange Printer	Hard
665	Non-decreasing Array	Medium
666	Path Sum IV	Medium
667	Beautiful Arrangement II	Medium
668	Kth Smallest Number in Multiplication Table	Hard
669	Trim a Binary Search Tree	Medium
670	Maximum Swap	Medium
671	Second Minimum Node In a Binary Tree	Easy
672	Bulb Switcher II	Medium
673	Number of Longest Increasing Subsequence	Medium
674	Longest Continuous Increasing Subsequence	Easy
675	Cut Off Trees for Golf Event	Hard
676	Implement Magic Dictionary	Medium
677	Map Sum Pairs	Medium
678	Valid Parenthesis String	Medium
679	24 Game	Hard
680	Valid Palindrome II	Easy
681	Next Closest Time	Medium
682	Baseball Game	Easy
683	K Empty Slots	Hard
684	Redundant Connection	Medium
685	Redundant Connection II	Hard
686	Repeated String Match	Easy
687	Longest Univalue Path	Medium
688	Knight Probability in Chessboard	Medium
689	Maximum Sum of 3 Non-Overlapping Subarrays	Hard
690	Employee Importance	Medium
691	Stickers to Spell Word	Hard
692	Top K Frequent Words	Medium
693	Binary Number with Alternating Bits	Easy
694	Number of Distinct Islands	Medium
695	Max Area of Island	Medium
696	Count Binary Substrings	Easy
697	Degree of an Array	Easy
698	Partition to K Equal Sum Subsets	Medium
699	Falling Squares	Hard
700	Search in a Binary Search Tree	Easy
701	Insert into a Binary Search Tree	Medium
702	Search in a Sorted Array of Unknown Size	Medium
703	Kth Largest Element in a Stream	Easy
704	Binary Search	Easy
705	Design HashSet	Easy
706	Design HashMap	Easy
707	Design Linked List	Medium
708	Insert into a Sorted Circular Linked List	Medium
709	To Lower Case	Easy
710	Random Pick with Blacklist	Hard
711	Number of Distinct Islands II	Hard
712	Minimum ASCII Delete Sum for Two Strings	Medium
713	Subarray Product Less Than K	Medium
714	Best Time to Buy and Sell Stock with Transaction Fee	Medium
715	Range Module	Hard
716	Max Stack	Hard
717	1-bit and 2-bit Characters	Easy
718	Maximum Length of Repeated Subarray	Medium
719	Find K-th Smallest Pair Distance	Hard
720	Longest Word in Dictionary	Medium
721	Accounts Merge	Medium
722	Remove Comments	Medium
723	Candy Crush	Medium
724	Find Pivot Index	Easy
725	Split Linked List in Parts	Medium
726	Number of Atoms	Hard
727	Minimum Window Subsequence	Hard
728	Self Dividing Numbers	Easy
729	My Calendar I	Medium
730	Count Different Palindromic Subsequences	Hard
731	My Calendar II	Medium
732	My Calendar III	Hard
733	Flood Fill	Easy
734	Sentence Similarity	Easy
735	Asteroid Collision	Medium
736	Parse Lisp Expression	Hard
737	Sentence Similarity II	Medium
738	Monotone Increasing Digits	Medium
739	Daily Temperatures	Medium
740	Delete and Earn	Medium
741	Cherry Pickup	Hard
742	Closest Leaf in a Binary Tree	Medium
743	Network Delay Time	Medium
744	Find Smallest Letter Greater Than Target	Easy
745	Prefix and Suffix Search	Hard
746	Min Cost Climbing Stairs	Easy
747	Largest Number At Least Twice of Others	Easy
748	Shortest Completing Word	Easy
749	Contain Virus	Hard
750	Number Of Corner Rectangles	Medium
751	IP to CIDR	Medium
752	Open the Lock	Medium
753	Cracking the Safe	Hard
754	Reach a Number	Medium
755	Pour Water	Medium
756	Pyramid Transition Matrix	Medium
757	Set Intersection Size At Least Two	Hard
758	Bold Words in String	Medium
759	Employee Free Time	Hard
760	Find Anagram Mappings	Easy
761	Special Binary String	Hard
762	Prime Number of Set Bits in Binary Representation	Easy
763	Partition Labels	Medium
764	Largest Plus Sign	Medium
765	Couples Holding Hands	Hard
766	Toeplitz Matrix	Easy
767	Reorganize String	Medium
768	Max Chunks To Make Sorted II	Hard
769	Max Chunks To Make Sorted	Medium
770	Basic Calculator IV	Hard
771	Jewels and Stones	Easy
772	Basic Calculator III	Hard
773	Sliding Puzzle	Hard
774	Minimize Max Distance to Gas Station	Hard
775	Global and Local Inversions	Medium
776	Split BST	Medium
777	Swap Adjacent in LR String	Medium
778	Swim in Rising Water	Hard
779	K-th Symbol in Grammar	Medium
780	Reaching Points	Hard
781	Rabbits in Forest	Medium
782	Transform to Chessboard	Hard
783	Minimum Distance Between BST Nodes	Easy
784	Letter Case Permutation	Medium
785	Is Graph Bipartite?	Medium
786	K-th Smallest Prime Fraction	Medium
787	Cheapest Flights Within K Stops	Medium
788	Rotated Digits	Medium
789	Escape The Ghosts	Medium
790	Domino and Tromino Tiling	Medium
791	Custom Sort String	Medium
792	Number of Matching Subsequences	Medium
793	Preimage Size of Factorial Zeroes Function	Hard
794	Valid Tic-Tac-Toe State	Medium
795	Number of Subarrays with Bounded Maximum	Medium
796	Rotate String	Easy
797	All Paths From Source to Target	Medium
798	Smallest Rotation with Highest Score	Hard
799	Champagne Tower	Medium
800	Similar RGB Color	Easy
801	Minimum Swaps To Make Sequences Increasing	Hard
802	Find Eventual Safe States	Medium
803	Bricks Falling When Hit	Hard
804	Unique Morse Code Words	Easy
805	Split Array With Same Average	Hard
806	Number of Lines To Write String	Easy
807	Max Increase to Keep City Skyline	Medium
808	Soup Servings	Medium
809	Expressive Words	Medium
810	Chalkboard XOR Game	Hard
811	Subdomain Visit Count	Medium
812	Largest Triangle Area	Easy
813	Largest Sum of Averages	Medium
814	Binary Tree Pruning	Medium
815	Bus Routes	Hard
816	Ambiguous Coordinates	Medium
817	Linked List Components	Medium
818	Race Car	Hard
819	Most Common Word	Easy
820	Short Encoding of Words	Medium
821	Shortest Distance to a Character	Easy
822	Card Flipping Game	Medium
823	Binary Trees With Factors	Medium
824	Goat Latin	Easy
825	Friends Of Appropriate Ages	Medium
826	Most Profit Assigning Work	Medium
827	Making A Large Island	Hard
828	Count Unique Characters of All Substrings of a Given String	Hard
829	Consecutive Numbers Sum	Hard
830	Positions of Large Groups	Easy
831	Masking Personal Information	Medium
832	Flipping an Image	Easy
833	Find And Replace in String	Medium
834	Sum of Distances in Tree	Hard
835	Image Overlap	Medium
836	Rectangle Overlap	Easy
837	New 21 Game	Medium
838	Push Dominoes	Medium
839	Similar String Groups	Hard
840	Magic Squares In Grid	Medium
841	Keys and Rooms	Medium
842	Split Array into Fibonacci Sequence	Medium
843	Guess the Word	Hard
844	Backspace String Compare	Easy
845	Longest Mountain in Array	Medium
846	Hand of Straights	Medium
847	Shortest Path Visiting All Nodes	Hard
848	Shifting Letters	Medium
849	Maximize Distance to Closest Person	Medium
850	Rectangle Area II	Hard
851	Loud and Rich	Medium
852	Peak Index in a Mountain Array	Medium
853	Car Fleet	Medium
854	K-Similar Strings	Hard
855	Exam Room	Medium
856	Score of Parentheses	Medium
857	Minimum Cost to Hire K Workers	Hard
858	Mirror Reflection	Medium
859	Buddy Strings	Easy
860	Lemonade Change	Easy
861	Score After Flipping Matrix	Medium
862	Shortest Subarray with Sum at Least K	Hard
863	All Nodes Distance K in Binary Tree	Medium
864	Shortest Path to Get All Keys	Hard
865	Smallest Subtree with all the Deepest Nodes	Medium
866	Prime Palindrome	Medium
867	Transpose Matrix	Easy
868	Binary Gap	Easy
869	Reordered Power of 2	Medium
870	Advantage Shuffle	Medium
871	Minimum Number of Refueling Stops	Hard
872	Leaf-Similar Trees	Easy
873	Length of Longest Fibonacci Subsequence	Medium
874	Walking Robot Simulation	Medium
875	Koko Eating Bananas	Medium
876	Middle of the Linked List	Easy
877	Stone Game	Medium
878	Nth Magical Number	Hard
879	Profitable Schemes	Hard
880	Decoded String at Index	Medium
881	Boats to Save People	Medium
882	Reachable Nodes In Subdivided Graph	Hard
883	Projection Area of 3D Shapes	Easy
884	Uncommon Words from Two Sentences	Easy
885	Spiral Matrix III	Medium
886	Possible Bipartition	Medium
887	Super Egg Drop	Hard
888	Fair Candy Swap	Easy
889	Construct Binary Tree from Preorder and Postorder Traversal	Medium
890	Find and Replace Pattern	Medium
891	Sum of Subsequence Widths	Hard
892	Surface Area of 3D Shapes	Easy
893	Groups of Special-Equivalent Strings	Medium
894	All Possible Full Binary Trees	Medium
895	Maximum Frequency Stack	Hard
896	Monotonic Array	Easy
897	Increasing Order Search Tree	Easy
898	Bitwise ORs of Subarrays	Medium
899	Orderly Queue	Hard
900	RLE Iterator	Medium
901	Online Stock Span	Medium
902	Numbers At Most N Given Digit Set	Hard
903	Valid Permutations for DI Sequence	Hard
904	Fruit Into Baskets	Medium
905	Sort Array By Parity	Easy
906	Super Palindromes	Hard
907	Sum of Subarray Minimums	Medium
908	Smallest Range I	Easy
909	Snakes and Ladders	Medium
910	Smallest Range II	Medium
911	Online Election	Medium
912	Sort an Array	Medium
913	Cat and Mouse	Hard
914	X of a Kind in a Deck of Cards	Medium
915	Partition Array into Disjoint Intervals	Medium
916	Word Subsets	Medium
917	Reverse Only Letters	Easy
918	Maximum Sum Circular Subarray	Medium
919	Complete Binary Tree Inserter	Medium
920	Number of Music Playlists	Hard
921	Minimum Add to Make Parentheses Valid	Medium
922	Sort Array By Parity II	Easy
923	3Sum With Multiplicity	Medium
924	Minimize Malware Spread	Hard
925	Long Pressed Name	Easy
926	Flip String to Monotone Increasing	Medium
927	Three Equal Parts	Hard
928	Minimize Malware Spread II	Hard
929	Unique Email Addresses	Easy
930	Binary Subarrays With Sum	Medium
931	Minimum Falling Path Sum	Medium
932	Beautiful Array	Medium
933	Number of Recent Calls	Easy
934	Shortest Bridge	Medium
935	Knight Dialer	Medium
936	Stamping The Sequence	Hard
937	Reorder Data in Log Files	Medium
938	Range Sum of BST	Easy
939	Minimum Area Rectangle	Medium
940	Distinct Subsequences II	Hard
941	Valid Mountain Array	Easy
942	DI String Match	Easy
943	Find the Shortest Superstring	Hard
944	Delete Columns to Make Sorted	Easy
945	Minimum Increment to Make Array Unique	Medium
946	Validate Stack Sequences	Medium
947	Most Stones Removed with Same Row or Column	Medium
948	Bag of Tokens	Medium
949	Largest Time for Given Digits	Medium
950	Reveal Cards In Increasing Order	Medium
951	Flip Equivalent Binary Trees	Medium
952	Largest Component Size by Common Factor	Hard
953	Verifying an Alien Dictionary	Easy
954	Array of Doubled Pairs	Medium
955	Delete Columns to Make Sorted II	Medium
956	Tallest Billboard	Hard
957	Prison Cells After N Days	Medium
958	Check Completeness of a Binary Tree	Medium
959	Regions Cut By Slashes	Medium
960	Delete Columns to Make Sorted III	Hard
961	N-Repeated Element in Size 2N Array	Easy
962	Maximum Width Ramp	Medium
963	Minimum Area Rectangle II	Medium
964	Least Operators to Express Number	Hard
965	Univalued Binary Tree	Easy
966	Vowel Spellchecker	Medium
967	Numbers With Same Consecutive Differences	Medium
968	Binary Tree Cameras	Hard
969	Pancake Sorting	Medium
970	Powerful Integers	Easy
971	Flip Binary Tree To Match Preorder Traversal	Medium
972	Equal Rational Numbers	Hard
973	K Closest Points to Origin	Medium
974	Subarray Sums Divisible by K	Medium
975	Odd Even Jump	Hard
976	Largest Perimeter Triangle	Easy
977	Squares of a Sorted Array	Easy
978	Longest Turbulent Subarray	Medium
979	Distribute Coins in Binary Tree	Medium
980	Unique Paths III	Hard
981	Time Based Key-Value Store	Medium
982	Triples with Bitwise AND Equal To Zero	Hard
983	Minimum Cost For Tickets	Medium
984	String Without AAA or BBB	Medium
985	Sum of Even Numbers After Queries	Easy
986	Interval List Intersections	Medium
987	Vertical Order Traversal of a Binary Tree	Hard
988	Smallest String Starting From Leaf	Medium
989	Add to Array-Form of Integer	Easy
990	Satisfiability of Equality Equations	Medium
991	Broken Calculator	Medium
992	Subarrays with K Different Integers	Hard
993	Cousins in Binary Tree	Easy
994	Rotting Oranges	Medium
995	Minimum Number of K Consecutive Bit Flips	Hard
996	Number of Squareful Arrays	Hard
997	Find the Town Judge	Easy
998	Maximum Binary Tree II	Medium
999	Available Captures for Rook	Easy
1000	Minimum Cost to Merge Stones	Hard
1001	Grid Illumination	Hard
1002	Find Common Characters	Easy
1003	Check If Word Is Valid After Substitutions	Medium
1004	Max Consecutive Ones III	Medium
1005	Maximize Sum Of Array After K Negations	Easy
1006	Clumsy Factorial	Medium
1007	Minimum Domino Rotations For Equal Row	Medium
1008	Construct Binary Search Tree from Preorder Traversal	Medium
1009	Complement of Base 10 Integer	Easy
1010	Pairs of Songs With Total Durations Divisible by 60	Medium
1011	Capacity To Ship Packages Within D Days	Medium
1012	Numbers With Repeated Digits	Hard
1013	Partition Array Into Three Parts With Equal Sum	Easy
1014	Best Sightseeing Pair	Medium
1015	Smallest Integer Divisible by K	Medium
1016	Binary String With Substrings Representing 1 To N	Medium
1017	Convert to Base -2	Medium
1018	Binary Prefix Divisible By 5	Easy
1019	Next Greater Node In Linked List	Medium
1020	Number of Enclaves	Medium
1021	Remove Outermost Parentheses	Easy
1022	Sum of Root To Leaf Binary Numbers	Easy
1023	Camelcase Matching	Medium
1024	Video Stitching	Medium
1025	Divisor Game	Easy
1026	Maximum Difference Between Node and Ancestor	Medium
1027	Longest Arithmetic Subsequence	Medium
1028	Recover a Tree From Preorder Traversal	Hard
1029	Two City Scheduling	Medium
1030	Matrix Cells in Distance Order	Easy
1031	Maximum Sum of Two Non-Overlapping Subarrays	Medium
1032	Stream of Characters	Hard
1033	Moving Stones Until Consecutive	Medium
1034	Coloring A Border	Medium
1035	Uncrossed Lines	Medium
1036	Escape a Large Maze	Hard
1037	Valid Boomerang	Easy
1038	Binary Search Tree to Greater Sum Tree	Medium
1039	Minimum Score Triangulation of Polygon	Medium
1040	Moving Stones Until Consecutive II	Medium
1041	Robot Bounded In Circle	Medium
1042	Flower Planting With No Adjacent	Medium
1043	Partition Array for Maximum Sum	Medium
1044	Longest Duplicate Substring	Hard
1046	Last Stone Weight	Easy
1047	Remove All Adjacent Duplicates In String	Easy
1048	Longest String Chain	Medium
1049	Last Stone Weight II	Medium
1051	Height Checker	Easy
1052	Grumpy Bookstore Owner	Medium
1053	Previous Permutation With One Swap	Medium
1054	Distant Barcodes	Medium
1055	Shortest Way to Form String	Medium
1056	Confusing Number	Easy
1057	Campus Bikes	Medium
1058	Minimize Rounding Error to Meet Target	Medium
1059	All Paths from Source Lead to Destination	Medium
1060	Missing Element in Sorted Array	Medium
1061	Lexicographically Smallest Equivalent String	Medium
1062	Longest Repeating Substring	Medium
1063	Number of Valid Subarrays	Hard
1064	Fixed Point	Easy
1065	Index Pairs of a String	Easy
1066	Campus Bikes II	Medium
1067	Digit Count in Range	Hard
1071	Greatest Common Divisor of Strings	Easy
1072	Flip Columns For Maximum Number of Equal Rows	Medium
1073	Adding Two Negabinary Numbers	Medium
1074	Number of Submatrices That Sum to Target	Hard
1078	Occurrences After Bigram	Easy
1079	Letter Tile Possibilities	Medium
1080	Insufficient Nodes in Root to Leaf Paths	Medium
1081	Smallest Subsequence of Distinct Characters	Medium
1085	Sum of Digits in the Minimum Number	Easy
1086	High Five	Easy
1087	Brace Expansion	Medium
1088	Confusing Number II	Hard
1089	Duplicate Zeros	Easy
1090	Largest Values From Labels	Medium
1091	Shortest Path in Binary Matrix	Medium
1092	Shortest Common Supersequence	Hard
1093	Statistics from a Large Sample	Medium
1094	Car Pooling	Medium
1095	Find in Mountain Array	Hard
1096	Brace Expansion II	Hard
1099	Two Sum Less Than K	Easy
1100	Find K-Length Substrings With No Repeated Characters	Medium
1101	The Earliest Moment When Everyone Become Friends	Medium
1102	Path With Maximum Minimum Value	Medium
1103	Distribute Candies to People	Easy
1104	Path In Zigzag Labelled Binary Tree	Medium
1105	Filling Bookcase Shelves	Medium
1106	Parsing A Boolean Expression	Hard
1108	Defanging an IP Address	Easy
1109	Corporate Flight Bookings	Medium
1110	Delete Nodes And Return Forest	Medium
1111	Maximum Nesting Depth of Two Valid Parentheses Strings	Medium
1118	Number of Days in a Month	Easy
1119	Remove Vowels from a String	Easy
1120	Maximum Average Subtree	Medium
1121	Divide Array Into Increasing Sequences	Hard
1122	Relative Sort Array	Easy
1123	Lowest Common Ancestor of Deepest Leaves	Medium
1124	Longest Well-Performing Interval	Medium
1125	Smallest Sufficient Team	Hard
1128	Number of Equivalent Domino Pairs	Easy
1129	Shortest Path with Alternating Colors	Medium
1130	Minimum Cost Tree From Leaf Values	Medium
1131	Maximum of Absolute Value Expression	Medium
1133	Largest Unique Number	Easy
1134	Armstrong Number	Easy
1135	Connecting Cities With Minimum Cost	Medium
1136	Parallel Courses	Medium
1137	N-th Tribonacci Number	Easy
1138	Alphabet Board Path	Medium
1139	Largest 1-Bordered Square	Medium
1140	Stone Game II	Medium
1143	Longest Common Subsequence	Medium
1144	Decrease Elements To Make Array Zigzag	Medium
1145	Binary Tree Coloring Game	Medium
1146	Snapshot Array	Medium
1147	Longest Chunked Palindrome Decomposition	Hard
1150	Check If a Number Is Majority Element in a Sorted Array	Easy
1151	Minimum Swaps to Group All 1's Together	Medium
1152	Analyze User Website Visit Pattern	Medium
1153	String Transforms Into Another String	Hard
1154	Day of the Year	Easy
1155	Number of Dice Rolls With Target Sum	Medium
1156	Swap For Longest Repeated Character Substring	Medium
1157	Online Majority Element In Subarray	Hard
1160	Find Words That Can Be Formed by Characters	Easy
1161	Maximum Level Sum of a Binary Tree	Medium
1162	As Far from Land as Possible	Medium
1163	Last Substring in Lexicographical Order	Hard
1165	Single-Row Keyboard	Easy
1166	Design File System	Medium
1167	Minimum Cost to Connect Sticks	Medium
1168	Optimize Water Distribution in a Village	Hard
1169	Invalid Transactions	Medium
1170	Compare Strings by Frequency of the Smallest Character	Medium
1171	Remove Zero Sum Consecutive Nodes from Linked List	Medium
1172	Dinner Plate Stacks	Hard
1175	Prime Arrangements	Easy
1176	Diet Plan Performance	Easy
1177	Can Make Palindrome from Substring	Medium
1178	Number of Valid Words for Each Puzzle	Hard
1180	Count Substrings with Only One Distinct Letter	Easy
1181	Before and After Puzzle	Medium
1182	Shortest Distance to Target Color	Medium
1183	Maximum Number of Ones	Hard
1184	Distance Between Bus Stops	Easy
1185	Day of the Week	Easy
1186	Maximum Subarray Sum with One Deletion	Medium
1187	Make Array Strictly Increasing	Hard
1189	Maximum Number of Balloons	Easy
1190	Reverse Substrings Between Each Pair of Parentheses	Medium
1191	K-Concatenation Maximum Sum	Medium
1192	Critical Connections in a Network	Hard
1196	How Many Apples Can You Put into the Basket	Easy
1197	Minimum Knight Moves	Medium
1198	Find Smallest Common Element in All Rows	Medium
1199	Minimum Time to Build Blocks	Hard
1200	Minimum Absolute Difference	Easy
1201	Ugly Number III	Medium
1202	Smallest String With Swaps	Medium
1203	Sort Items by Groups Respecting Dependencies	Hard
1206	Design Skiplist	Hard
1207	Unique Number of Occurrences	Easy
1208	Get Equal Substrings Within Budget	Medium
1209	Remove All Adjacent Duplicates in String II	Medium
1210	Minimum Moves to Reach Target with Rotations	Hard
1213	Intersection of Three Sorted Arrays	Easy
1214	Two Sum BSTs	Medium
1215	Stepping Numbers	Medium
1216	Valid Palindrome III	Hard
1217	Minimum Cost to Move Chips to The Same Position	Easy
1218	Longest Arithmetic Subsequence of Given Difference	Medium
1219	Path with Maximum Gold	Medium
1220	Count Vowels Permutation	Hard
1221	Split a String in Balanced Strings	Easy
1222	Queens That Can Attack the King	Medium
1223	Dice Roll Simulation	Hard
1224	Maximum Equal Frequency	Hard
1227	Airplane Seat Assignment Probability	Medium
1228	Missing Number In Arithmetic Progression	Easy
1229	Meeting Scheduler	Medium
1230	Toss Strange Coins	Medium
1231	Divide Chocolate	Hard
1232	Check If It Is a Straight Line	Easy
1233	Remove Sub-Folders from the Filesystem	Medium
1234	Replace the Substring for Balanced String	Medium
1235	Maximum Profit in Job Scheduling	Hard
1236	Web Crawler	Medium
1237	Find Positive Integer Solution for a Given Equation	Medium
1238	Circular Permutation in Binary Representation	Medium
1239	Maximum Length of a Concatenated String with Unique Characters	Medium
1240	Tiling a Rectangle with the Fewest Squares	Hard
1243	Array Transformation	Easy
1244	Design A Leaderboard	Medium
1245	Tree Diameter	Medium
1246	Palindrome Removal	Hard
1247	Minimum Swaps to Make Strings Equal	Medium
1248	Count Number of Nice Subarrays	Medium
1249	Minimum Remove to Make Valid Parentheses	Medium
1250	Check If It Is a Good Array	Hard
1252	Cells with Odd Values in a Matrix	Easy
1253	Reconstruct a 2-Row Binary Matrix	Medium
1254	Number of Closed Islands	Medium
1255	Maximum Score Words Formed by Letters	Hard
1256	Encode Number	Medium
1257	Smallest Common Region	Medium
1258	Synonymous Sentences	Medium
1259	Handshakes That Don't Cross	Hard
1260	Shift 2D Grid	Easy
1261	Find Elements in a Contaminated Binary Tree	Medium
1262	Greatest Sum Divisible by Three	Medium
1263	Minimum Moves to Move a Box to Their Target Location	Hard
1265	Print Immutable Linked List in Reverse	Medium
1266	Minimum Time Visiting All Points	Easy
1267	Count Servers that Communicate	Medium
1268	Search Suggestions System	Medium
1269	Number of Ways to Stay in the Same Place After Some Steps	Hard
1271	Hexspeak	Easy
1272	Remove Interval	Medium
1273	Delete Tree Nodes	Medium
1274	Number of Ships in a Rectangle	Hard
1275	Find Winner on a Tic Tac Toe Game	Easy
1276	Number of Burgers with No Waste of Ingredients	Medium
1277	Count Square Submatrices with All Ones	Medium
1278	Palindrome Partitioning III	Hard
1281	Subtract the Product and Sum of Digits of an Integer	Easy
1282	Group the People Given the Group Size They Belong To	Medium
1283	Find the Smallest Divisor Given a Threshold	Medium
1284	Minimum Number of Flips to Convert Binary Matrix to Zero Matrix	Hard
1286	Iterator for Combination	Medium
1287	Element Appearing More Than 25% In Sorted Array	Easy
1288	Remove Covered Intervals	Medium
1289	Minimum Falling Path Sum II	Hard
1290	Convert Binary Number in a Linked List to Integer	Easy
1291	Sequential Digits	Medium
1292	Maximum Side Length of a Square with Sum Less than or Equal to Threshold	Medium
1293	Shortest Path in a Grid with Obstacles Elimination	Hard
1295	Find Numbers with Even Number of Digits	Easy
1296	Divide Array in Sets of K Consecutive Numbers	Medium
1297	Maximum Number of Occurrences of a Substring	Medium
1298	Maximum Candies You Can Get from Boxes	Hard
1299	Replace Elements with Greatest Element on Right Side	Easy
1300	Sum of Mutated Array Closest to Target	Medium
1301	Number of Paths with Max Score	Hard
1302	Deepest Leaves Sum	Medium
1304	Find N Unique Integers Sum up to Zero	Easy
1305	All Elements in Two Binary Search Trees	Medium
1306	Jump Game III	Medium
1307	Verbal Arithmetic Puzzle	Hard
1309	Decrypt String from Alphabet to Integer Mapping	Easy
1310	XOR Queries of a Subarray	Medium
1311	Get Watched Videos by Your Friends	Medium
1312	Minimum Insertion Steps to Make a String Palindrome	Hard
1313	Decompress Run-Length Encoded List	Easy
1314	Matrix Block Sum	Medium
1315	Sum of Nodes with Even-Valued Grandparent	Medium
1316	Distinct Echo Substrings	Hard
1317	Convert Integer to the Sum of Two No-Zero Integers	Easy
1318	Minimum Flips to Make a OR b Equal to c	Medium
1319	Number of Operations to Make Network Connected	Medium
1320	Minimum Distance to Type a Word Using Two Fingers	Hard
1323	Maximum 69 Number	Easy
1324	Print Words Vertically	Medium
1325	Delete Leaves With a Given Value	Medium
1326	Minimum Number of Taps to Open to Water a Garden	Hard
1328	Break a Palindrome	Medium
1329	Sort the Matrix Diagonally	Medium
1330	Reverse Subarray To Maximize Array Value	Hard
1331	Rank Transform of an Array	Easy
1332	Remove Palindromic Subsequences	Easy
1333	Filter Restaurants by Vegan-Friendly, Price and Distance	Medium
1334	Find the City With the Smallest Number of Neighbors at a Threshold Distance	Medium
1335	Minimum Difficulty of a Job Schedule	Hard
1337	The K Weakest Rows in a Matrix	Easy
1338	Reduce Array Size to The Half	Medium
1339	Maximum Product of Splitted Binary Tree	Medium
1340	Jump Game V	Hard
1342	Number of Steps to Reduce a Number to Zero	Easy
1343	Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold	Medium
1344	Angle Between Hands of a Clock	Medium
1345	Jump Game IV	Hard
1346	Check If N and Its Double Exist	Easy
1347	Minimum Number of Steps to Make Two Strings Anagram	Medium
1348	Tweet Counts Per Frequency	Medium
1349	Maximum Students Taking Exam	Hard
1351	Count Negative Numbers in a Sorted Matrix	Easy
1352	Product of the Last K Numbers	Medium
1353	Maximum Number of Events That Can Be Attended	Medium
1354	Construct Target Array With Multiple Sums	Hard
1356	Sort Integers by The Number of 1 Bits	Easy
1357	Apply Discount Every n Orders	Medium
1358	Number of Substrings Containing All Three Characters	Medium
1359	Count All Valid Pickup and Delivery Options	Hard
1360	Number of Days Between Two Dates	Easy
1361	Validate Binary Tree Nodes	Medium
1362	Closest Divisors	Medium
1363	Largest Multiple of Three	Hard
1365	How Many Numbers Are Smaller Than the Current Number	Easy
1366	Rank Teams by Votes	Medium
1367	Linked List in Binary Tree	Medium
1368	Minimum Cost to Make at Least One Valid Path in a Grid	Hard
1370	Increasing Decreasing String	Easy
1371	Find the Longest Substring Containing Vowels in Even Counts	Medium
1372	Longest ZigZag Path in a Binary Tree	Medium
1373	Maximum Sum BST in Binary Tree	Hard
1374	Generate a String With Characters That Have Odd Counts	Easy
1375	Number of Times Binary String Is Prefix-Aligned	Medium
1376	Time Needed to Inform All Employees	Medium
1377	Frog Position After T Seconds	Hard
1379	Find a Corresponding Node of a Binary Tree in a Clone of That Tree	Easy
1380	Lucky Numbers in a Matrix	Easy
1381	Design a Stack With Increment Operation	Medium
1382	Balance a Binary Search Tree	Medium
1383	Maximum Performance of a Team	Hard
1385	Find the Distance Value Between Two Arrays	Easy
1386	Cinema Seat Allocation	Medium
1387	Sort Integers by The Power Value	Medium
1388	Pizza With 3n Slices	Hard
1389	Create Target Array in the Given Order	Easy
1390	Four Divisors	Medium
1391	Check if There is a Valid Path in a Grid	Medium
1392	Longest Happy Prefix	Hard
1394	Find Lucky Integer in an Array	Easy
1395	Count Number of Teams	Medium
1396	Design Underground System	Medium
1397	Find All Good Strings	Hard
1399	Count Largest Group	Easy
1400	Construct K Palindrome Strings	Medium
1401	Circle and Rectangle Overlapping	Medium
1402	Reducing Dishes	Hard
1403	Minimum Subsequence in Non-Increasing Order	Easy
1404	Number of Steps to Reduce a Number in Binary Representation to One	Medium
1405	Longest Happy String	Medium
1406	Stone Game III	Hard
1408	String Matching in an Array	Easy
1409	Queries on a Permutation With Key	Medium
1410	HTML Entity Parser	Medium
1411	Number of Ways to Paint N × 3 Grid	Hard
1413	Minimum Value to Get Positive Step by Step Sum	Easy
1414	Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	Medium
1415	The k-th Lexicographical String of All Happy Strings of Length n	Medium
1416	Restore The Array	Hard
1417	Reformat The String	Easy
1418	Display Table of Food Orders in a Restaurant	Medium
1419	Minimum Number of Frogs Croaking	Medium
1420	Build Array Where You Can Find The Maximum Exactly K Comparisons	Hard
1422	Maximum Score After Splitting a String	Easy
1423	Maximum Points You Can Obtain from Cards	Medium
1424	Diagonal Traverse II	Medium
1425	Constrained Subsequence Sum	Hard
1426	Counting Elements	Easy
1427	Perform String Shifts	Easy
1428	Leftmost Column with at Least a One	Medium
1429	First Unique Number	Medium
1430	Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree	Medium
1431	Kids With the Greatest Number of Candies	Easy
1432	Max Difference You Can Get From Changing an Integer	Medium
1433	Check If a String Can Break Another String	Medium
1434	Number of Ways to Wear Different Hats to Each Other	Hard
1436	Destination City	Easy
1437	Check If All 1's Are at Least Length K Places Away	Easy
1438	Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	Medium
1439	Find the Kth Smallest Sum of a Matrix With Sorted Rows	Hard
1441	Build an Array With Stack Operations	Medium
1442	Count Triplets That Can Form Two Arrays of Equal XOR	Medium
1443	Minimum Time to Collect All Apples in a Tree	Medium
1444	Number of Ways of Cutting a Pizza	Hard
1446	Consecutive Characters	Easy
1447	Simplified Fractions	Medium
1448	Count Good Nodes in Binary Tree	Medium
1449	Form Largest Integer With Digits That Add up to Target	Hard
1450	Number of Students Doing Homework at a Given Time	Easy
1451	Rearrange Words in a Sentence	Medium
1452	People Whose List of Favorite Companies Is Not a Subset of Another List	Medium
1453	Maximum Number of Darts Inside of a Circular Dartboard	Hard
1455	Check If a Word Occurs As a Prefix of Any Word in a Sentence	Easy
1456	Maximum Number of Vowels in a Substring of Given Length	Medium
1457	Pseudo-Palindromic Paths in a Binary Tree	Medium
1458	Max Dot Product of Two Subsequences	Hard
1460	Make Two Arrays Equal by Reversing Sub-arrays	Easy
1461	Check If a String Contains All Binary Codes of Size K	Medium
1462	Course Schedule IV	Medium
1463	Cherry Pickup II	Hard
1464	Maximum Product of Two Elements in an Array	Easy
1465	Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts	Medium
1466	Reorder Routes to Make All Paths Lead to the City Zero	Medium
1467	Probability of a Two Boxes Having The Same Number of Distinct Balls	Hard
1469	Find All The Lonely Nodes	Easy
1470	Shuffle the Array	Easy
1471	The k Strongest Values in an Array	Medium
1472	Design Browser History	Medium
1473	Paint House III	Hard
1474	Delete N Nodes After M Nodes of a Linked List	Easy
1475	Final Prices With a Special Discount in a Shop	Easy
1476	Subrectangle Queries	Medium
1477	Find Two Non-overlapping Sub-arrays Each With Target Sum	Medium
1478	Allocate Mailboxes	Hard
1480	Running Sum of 1d Array	Easy
1481	Least Number of Unique Integers after K Removals	Medium
1482	Minimum Number of Days to Make m Bouquets	Medium
1483	Kth Ancestor of a Tree Node	Hard
1485	Clone Binary Tree With Random Pointer	Medium
1486	XOR Operation in an Array	Easy
1487	Making File Names Unique	Medium
1488	Avoid Flood in The City	Medium
1489	Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree	Hard
1490	Clone N-ary Tree	Medium
1491	Average Salary Excluding the Minimum and Maximum Salary	Easy
1492	The kth Factor of n	Medium
1493	Longest Subarray of 1's After Deleting One Element	Medium
1494	Parallel Courses II	Hard
1496	Path Crossing	Easy
1497	Check If Array Pairs Are Divisible by k	Medium
1498	Number of Subsequences That Satisfy the Given Sum Condition	Medium
1499	Max Value of Equation	Hard
1500	Design a File Sharing System	Medium
1502	Can Make Arithmetic Progression From Sequence	Easy
1503	Last Moment Before All Ants Fall Out of a Plank	Medium
1504	Count Submatrices With All Ones	Medium
1505	Minimum Possible Integer After at Most K Adjacent Swaps On Digits	Hard
1506	Find Root of N-Ary Tree	Medium
1507	Reformat Date	Easy
1508	Range Sum of Sorted Subarray Sums	Medium
1509	Minimum Difference Between Largest and Smallest Value in Three Moves	Medium
1510	Stone Game IV	Hard
1512	Number of Good Pairs	Easy
1513	Number of Substrings With Only 1s	Medium
1514	Path with Maximum Probability	Medium
1515	Best Position for a Service Centre	Hard
1516	Move Sub-Tree of N-Ary Tree	Hard
1518	Water Bottles	Easy
1519	Number of Nodes in the Sub-Tree With the Same Label	Medium
1520	Maximum Number of Non-Overlapping Substrings	Hard
1521	Find a Value of a Mysterious Function Closest to Target	Hard
1522	Diameter of N-Ary Tree	Medium
1523	Count Odd Numbers in an Interval Range	Easy
1524	Number of Sub-arrays With Odd Sum	Medium
1525	Number of Good Ways to Split a String	Medium
1526	Minimum Number of Increments on Subarrays to Form a Target Array	Hard
1528	Shuffle String	Easy
1529	Minimum Suffix Flips	Medium
1530	Number of Good Leaf Nodes Pairs	Medium
1531	String Compression II	Hard
1533	Find the Index of the Large Integer	Medium
1534	Count Good Triplets	Easy
1535	Find the Winner of an Array Game	Medium
1536	Minimum Swaps to Arrange a Binary Grid	Medium
1537	Get the Maximum Score	Hard
1538	Guess the Majority in a Hidden Array	Medium
1539	Kth Missing Positive Number	Easy
1540	Can Convert String in K Moves	Medium
1541	Minimum Insertions to Balance a Parentheses String	Medium
1542	Find Longest Awesome Substring	Hard
1544	Make The String Great	Easy
1545	Find Kth Bit in Nth Binary String	Medium
1546	Maximum Number of Non-Overlapping Subarrays With Sum Equals Target	Medium
1547	Minimum Cost to Cut a Stick	Hard
1548	The Most Similar Path in a Graph	Hard
1550	Three Consecutive Odds	Easy
1551	Minimum Operations to Make Array Equal	Medium
1552	Magnetic Force Between Two Balls	Medium
1553	Minimum Number of Days to Eat N Oranges	Hard
1554	Strings Differ by One Character	Medium
1556	Thousand Separator	Easy
1557	Minimum Number of Vertices to Reach All Nodes	Medium
1558	Minimum Numbers of Function Calls to Make Target Array	Medium
1559	Detect Cycles in 2D Grid	Medium
1560	Most Visited Sector in a Circular Track	Easy
1561	Maximum Number of Coins You Can Get	Medium
1562	Find Latest Group of Size M	Medium
1563	Stone Game V	Hard
1564	Put Boxes Into the Warehouse I	Medium
1566	Detect Pattern of Length M Repeated K or More Times	Easy
1567	Maximum Length of Subarray With Positive Product	Medium
1568	Minimum Number of Days to Disconnect Island	Hard
1569	Number of Ways to Reorder Array to Get Same BST	Hard
1570	Dot Product of Two Sparse Vectors	Medium
1572	Matrix Diagonal Sum	Easy
1573	Number of Ways to Split a String	Medium
1574	Shortest Subarray to be Removed to Make Array Sorted	Medium
1575	Count All Possible Routes	Hard
1576	Replace All ?'s to Avoid Consecutive Repeating Characters	Medium
1577	Number of Ways Where Square of Number Is Equal to Product of Two Numbers	Medium
1578	Minimum Time to Make Rope Colorful	Medium
1579	Remove Max Number of Edges to Keep Graph Fully Traversable	Hard
1580	Put Boxes Into the Warehouse II	Medium
1582	Special Positions in a Binary Matrix	Easy
1583	Count Unhappy Friends	Medium
1584	Min Cost to Connect All Points	Medium
1585	Check If String Is Transformable With Substring Sort Operations	Hard
1586	Binary Search Tree Iterator II	Medium
1588	Sum of All Odd Length Subarrays	Easy
1589	Maximum Sum Obtained of Any Permutation	Medium
1590	Make Sum Divisible by P	Medium
1591	Strange Printer II	Hard
1592	Rearrange Spaces Between Words	Easy
1593	Split a String Into the Max Number of Unique Substrings	Medium
1594	Maximum Non Negative Product in a Matrix	Medium
1595	Minimum Cost to Connect Two Groups of Points	Hard
1597	Build Binary Expression Tree From Infix Expression	Hard
1598	Crawler Log Folder	Easy
1599	Maximum Profit of Operating a Centennial Wheel	Medium
1600	Throne Inheritance	Medium
1601	Maximum Number of Achievable Transfer Requests	Hard
1602	Find Nearest Right Node in Binary Tree	Medium
1603	Design Parking System	Easy
1604	Alert Using Same Key-Card Three or More Times in a One Hour Period	Medium
1605	Find Valid Matrix Given Row and Column Sums	Medium
1606	Find Servers That Handled Most Number of Requests	Hard
1608	Special Array With X Elements Greater Than or Equal X	Easy
1609	Even Odd Tree	Medium
1610	Maximum Number of Visible Points	Hard
1611	Minimum One Bit Operations to Make Integers Zero	Hard
1612	Check If Two Expression Trees are Equivalent	Medium
1614	Maximum Nesting Depth of the Parentheses	Easy
1615	Maximal Network Rank	Medium
1616	Split Two Strings to Make Palindrome	Medium
1617	Count Subtrees With Max Distance Between Cities	Hard
1618	Maximum Font to Fit a Sentence in a Screen	Medium
1619	Mean of Array After Removing Some Elements	Easy
1620	Coordinate With Maximum Network Quality	Medium
1621	Number of Sets of K Non-Overlapping Line Segments	Medium
1622	Fancy Sequence	Hard
1624	Largest Substring Between Two Equal Characters	Easy
1625	Lexicographically Smallest String After Applying Operations	Medium
1626	Best Team With No Conflicts	Medium
1627	Graph Connectivity With Threshold	Hard
1628	Design an Expression Tree With Evaluate Function	Medium
1629	Slowest Key	Easy
1630	Arithmetic Subarrays	Medium
1631	Path With Minimum Effort	Medium
1632	Rank Transform of a Matrix	Hard
1634	Add Two Polynomials Represented as Linked Lists	Medium
1636	Sort Array by Increasing Frequency	Easy
1637	Widest Vertical Area Between Two Points Containing No Points	Easy
1638	Count Substrings That Differ by One Character	Medium
1639	Number of Ways to Form a Target String Given a Dictionary	Hard
1640	Check Array Formation Through Concatenation	Easy
1641	Count Sorted Vowel Strings	Medium
1642	Furthest Building You Can Reach	Medium
1643	Kth Smallest Instructions	Hard
1644	Lowest Common Ancestor of a Binary Tree II	Medium
1646	Get Maximum in Generated Array	Easy
1647	Minimum Deletions to Make Character Frequencies Unique	Medium
1648	Sell Diminishing-Valued Colored Balls	Medium
1649	Create Sorted Array through Instructions	Hard
1650	Lowest Common Ancestor of a Binary Tree III	Medium
1652	Defuse the Bomb	Easy
1653	Minimum Deletions to Make String Balanced	Medium
1654	Minimum Jumps to Reach Home	Medium
1655	Distribute Repeating Integers	Hard
1656	Design an Ordered Stream	Easy
1657	Determine if Two Strings Are Close	Medium
1658	Minimum Operations to Reduce X to Zero	Medium
1659	Maximize Grid Happiness	Hard
1660	Correct a Binary Tree	Medium
1662	Check If Two String Arrays are Equivalent	Easy
1663	Smallest String With A Given Numeric Value	Medium
1664	Ways to Make a Fair Array	Medium
1665	Minimum Initial Energy to Finish Tasks	Hard
1666	Change the Root of a Binary Tree	Medium
1668	Maximum Repeating Substring	Easy
1669	Merge In Between Linked Lists	Medium
1670	Design Front Middle Back Queue	Medium
1671	Minimum Number of Removals to Make Mountain Array	Hard
1672	Richest Customer Wealth	Easy
1673	Find the Most Competitive Subsequence	Medium
1674	Minimum Moves to Make Array Complementary	Medium
1675	Minimize Deviation in Array	Hard
1676	Lowest Common Ancestor of a Binary Tree IV	Medium
1678	Goal Parser Interpretation	Easy
1679	Max Number of K-Sum Pairs	Medium
1680	Concatenation of Consecutive Binary Numbers	Medium
1681	Minimum Incompatibility	Hard
1682	Longest Palindromic Subsequence II	Medium
1684	Count the Number of Consistent Strings	Easy
1685	Sum of Absolute Differences in a Sorted Array	Medium
1686	Stone Game VI	Medium
1687	Delivering Boxes from Storage to Ports	Hard
1688	Count of Matches in Tournament	Easy
1689	Partitioning Into Minimum Number Of Deci-Binary Numbers	Medium
1690	Stone Game VII	Medium
1691	Maximum Height by Stacking Cuboids	Hard
1692	Count Ways to Distribute Candies	Hard
1694	Reformat Phone Number	Easy
1695	Maximum Erasure Value	Medium
1696	Jump Game VI	Medium
1697	Checking Existence of Edge Length Limited Paths	Hard
1698	Number of Distinct Substrings in a String	Medium
1700	Number of Students Unable to Eat Lunch	Easy
1701	Average Waiting Time	Medium
1702	Maximum Binary String After Change	Medium
1703	Minimum Adjacent Swaps for K Consecutive Ones	Hard
1704	Determine if String Halves Are Alike	Easy
1705	Maximum Number of Eaten Apples	Medium
1706	Where Will the Ball Fall	Medium
1707	Maximum XOR With an Element From Array	Hard
1708	Largest Subarray Length K	Easy
1710	Maximum Units on a Truck	Easy
1711	Count Good Meals	Medium
1712	Ways to Split Array Into Three Subarrays	Medium
1713	Minimum Operations to Make a Subsequence	Hard
1714	Sum Of Special Evenly-Spaced Elements In Array	Hard
1716	Calculate Money in Leetcode Bank	Easy
1717	Maximum Score From Removing Substrings	Medium
1718	Construct the Lexicographically Largest Valid Sequence	Medium
1719	Number Of Ways To Reconstruct A Tree	Hard
1720	Decode XORed Array	Easy
1721	Swapping Nodes in a Linked List	Medium
1722	Minimize Hamming Distance After Swap Operations	Medium
1723	Find Minimum Time to Finish All Jobs	Hard
1724	Checking Existence of Edge Length Limited Paths II	Hard
1725	Number Of Rectangles That Can Form The Largest Square	Easy
1726	Tuple with Same Product	Medium
1727	Largest Submatrix With Rearrangements	Medium
1728	Cat and Mouse II	Hard
1730	Shortest Path to Get Food	Medium
1732	Find the Highest Altitude	Easy
1733	Minimum Number of People to Teach	Medium
1734	Decode XORed Permutation	Medium
1735	Count Ways to Make Array With Product	Hard
1736	Latest Time by Replacing Hidden Digits	Easy
1737	Change Minimum Characters to Satisfy One of Three Conditions	Medium
1738	Find Kth Largest XOR Coordinate Value	Medium
1739	Building Boxes	Hard
1740	Find Distance in a Binary Tree	Medium
1742	Maximum Number of Balls in a Box	Easy
1743	Restore the Array From Adjacent Pairs	Medium
1744	Can You Eat Your Favorite Candy on Your Favorite Day?	Medium
1745	Palindrome Partitioning IV	Hard
1746	Maximum Subarray Sum After One Operation	Medium
1748	Sum of Unique Elements	Easy
1749	Maximum Absolute Sum of Any Subarray	Medium
1750	Minimum Length of String After Deleting Similar Ends	Medium
1751	Maximum Number of Events That Can Be Attended II	Hard
1752	Check if Array Is Sorted and Rotated	Easy
1753	Maximum Score From Removing Stones	Medium
1754	Largest Merge Of Two Strings	Medium
1755	Closest Subsequence Sum	Hard
1756	Design Most Recently Used Queue	Medium
1758	Minimum Changes To Make Alternating Binary String	Easy
1759	Count Number of Homogenous Substrings	Medium
1760	Minimum Limit of Balls in a Bag	Medium
1761	Minimum Degree of a Connected Trio in a Graph	Hard
1762	Buildings With an Ocean View	Medium
1763	Longest Nice Substring	Easy
1764	Form Array by Concatenating Subarrays of Another Array	Medium
1765	Map of Highest Peak	Medium
1766	Tree of Coprimes	Hard
1768	Merge Strings Alternately	Easy
1769	Minimum Number of Operations to Move All Balls to Each Box	Medium
1770	Maximum Score from Performing Multiplication Operations	Hard
1771	Maximize Palindrome Length From Subsequences	Hard
1772	Sort Features by Popularity	Medium
1773	Count Items Matching a Rule	Easy
1774	Closest Dessert Cost	Medium
1775	Equal Sum Arrays With Minimum Number of Operations	Medium
1776	Car Fleet II	Hard
1778	Shortest Path in a Hidden Grid	Medium
1779	Find Nearest Point That Has the Same X or Y Coordinate	Easy
1780	Check if Number is a Sum of Powers of Three	Medium
1781	Sum of Beauty of All Substrings	Medium
1782	Count Pairs Of Nodes	Hard
1784	Check if Binary String Has at Most One Segment of Ones	Easy
1785	Minimum Elements to Add to Form a Given Sum	Medium
1786	Number of Restricted Paths From First to Last Node	Medium
1787	Make the XOR of All Segments Equal to Zero	Hard
1788	Maximize the Beauty of the Garden	Hard
1790	Check if One String Swap Can Make Strings Equal	Easy
1791	Find Center of Star Graph	Easy
1792	Maximum Average Pass Ratio	Medium
1793	Maximum Score of a Good Subarray	Hard
1794	Count Pairs of Equal Substrings With Minimum Difference	Medium
1796	Second Largest Digit in a String	Easy
1797	Design Authentication Manager	Medium
1798	Maximum Number of Consecutive Values You Can Make	Medium
1799	Maximize Score After N Operations	Hard
1800	Maximum Ascending Subarray Sum	Easy
1801	Number of Orders in the Backlog	Medium
1802	Maximum Value at a Given Index in a Bounded Array	Medium
1803	Count Pairs With XOR in a Range	Hard
1804	Implement Trie II (Prefix Tree)	Medium
1805	Number of Different Integers in a String	Easy
1806	Minimum Number of Operations to Reinitialize a Permutation	Medium
1807	Evaluate the Bracket Pairs of a String	Medium
1808	Maximize Number of Nice Divisors	Hard
1810	Minimum Path Cost in a Hidden Grid	Medium
1812	Determine Color of a Chessboard Square	Easy
1813	Sentence Similarity III	Medium
1814	Count Nice Pairs in an Array	Medium
1815	Maximum Number of Groups Getting Fresh Donuts	Hard
1816	Truncate Sentence	Easy
1817	Finding the Users Active Minutes	Medium
1818	Minimum Absolute Sum Difference	Medium
1819	Number of Different Subsequences GCDs	Hard
1820	Maximum Number of Accepted Invitations	Medium
1822	Sign of the Product of an Array	Easy
1823	Find the Winner of the Circular Game	Medium
1824	Minimum Sideway Jumps	Medium
1825	Finding MK Average	Hard
1826	Faulty Sensor	Easy
1827	Minimum Operations to Make the Array Increasing	Easy
1828	Queries on Number of Points Inside a Circle	Medium
1829	Maximum XOR for Each Query	Medium
1830	Minimum Number of Operations to Make String Sorted	Hard
1832	Check if the Sentence Is Pangram	Easy
1833	Maximum Ice Cream Bars	Medium
1834	Single-Threaded CPU	Medium
1835	Find XOR Sum of All Pairs Bitwise AND	Hard
1836	Remove Duplicates From an Unsorted Linked List	Medium
1837	Sum of Digits in Base K	Easy
1838	Frequency of the Most Frequent Element	Medium
1839	Longest Substring Of All Vowels in Order	Medium
1840	Maximum Building Height	Hard
1842	Next Palindrome Using Same Digits	Hard
1844	Replace All Digits with Characters	Easy
1845	Seat Reservation Manager	Medium
1846	Maximum Element After Decreasing and Rearranging	Medium
1847	Closest Room	Hard
1848	Minimum Distance to the Target Element	Easy
1849	Splitting a String Into Descending Consecutive Values	Medium
1850	Minimum Adjacent Swaps to Reach the Kth Smallest Number	Medium
1851	Minimum Interval to Include Each Query	Hard
1852	Distinct Numbers in Each Subarray	Medium
1854	Maximum Population Year	Easy
1855	Maximum Distance Between a Pair of Values	Medium
1856	Maximum Subarray Min-Product	Medium
1857	Largest Color Value in a Directed Graph	Hard
1858	Longest Word With All Prefixes	Medium
1859	Sorting the Sentence	Easy
1860	Incremental Memory Leak	Medium
1861	Rotating the Box	Medium
1862	Sum of Floored Pairs	Hard
1863	Sum of All Subset XOR Totals	Easy
1864	Minimum Number of Swaps to Make the Binary String Alternating	Medium
1865	Finding Pairs With a Certain Sum	Medium
1866	Number of Ways to Rearrange Sticks With K Sticks Visible	Hard
1868	Product of Two Run-Length Encoded Arrays	Medium
1869	Longer Contiguous Segments of Ones than Zeros	Easy
1870	Minimum Speed to Arrive on Time	Medium
1871	Jump Game VII	Medium
1872	Stone Game VIII	Hard
1874	Minimize Product Sum of Two Arrays	Medium
1876	Substrings of Size Three with Distinct Characters	Easy
1877	Minimize Maximum Pair Sum in Array	Medium
1878	Get Biggest Three Rhombus Sums in a Grid	Medium
1879	Minimum XOR Sum of Two Arrays	Hard
1880	Check if Word Equals Summation of Two Words	Easy
1881	Maximum Value after Insertion	Medium
1882	Process Tasks Using Servers	Medium
1883	Minimum Skips to Arrive at Meeting On Time	Hard
1884	Egg Drop With 2 Eggs and N Floors	Medium
1885	Count Pairs in Two Arrays	Medium
1886	Determine Whether Matrix Can Be Obtained By Rotation	Easy
1887	Reduction Operations to Make the Array Elements Equal	Medium
1888	Minimum Number of Flips to Make the Binary String Alternating	Medium
1889	Minimum Space Wasted From Packaging	Hard
1891	Cutting Ribbons	Medium
1893	Check if All the Integers in a Range Are Covered	Easy
1894	Find the Student that Will Replace the Chalk	Medium
1895	Largest Magic Square	Medium
1896	Minimum Cost to Change the Final Value of Expression	Hard
1897	Redistribute Characters to Make All Strings Equal	Easy
1898	Maximum Number of Removable Characters	Medium
1899	Merge Triplets to Form Target Triplet	Medium
1900	The Earliest and Latest Rounds Where Players Compete	Hard
1901	Find a Peak Element II	Medium
1902	Depth of BST Given Insertion Order	Medium
1903	Largest Odd Number in String	Easy
1904	The Number of Full Rounds You Have Played	Medium
1905	Count Sub Islands	Medium
1906	Minimum Absolute Difference Queries	Medium
1908	Game of Nim	Medium
1909	Remove One Element to Make the Array Strictly Increasing	Easy
1910	Remove All Occurrences of a Substring	Medium
1911	Maximum Alternating Subsequence Sum	Medium
1912	Design Movie Rental System	Hard
1913	Maximum Product Difference Between Two Pairs	Easy
1914	Cyclically Rotating a Grid	Medium
1915	Number of Wonderful Substrings	Medium
1916	Count Ways to Build Rooms in an Ant Colony	Hard
1918	Kth Smallest Subarray Sum	Medium
1920	Build Array from Permutation	Easy
1921	Eliminate Maximum Number of Monsters	Medium
1922	Count Good Numbers	Medium
1923	Longest Common Subpath	Hard
1924	Erect the Fence II	Hard
1925	Count Square Sum Triples	Easy
1926	Nearest Exit from Entrance in Maze	Medium
1927	Sum Game	Medium
1928	Minimum Cost to Reach Destination in Time	Hard
1929	Concatenation of Array	Easy
1930	Unique Length-3 Palindromic Subsequences	Medium
1931	Painting a Grid With Three Different Colors	Hard
1932	Merge BSTs to Create Single BST	Hard
1933	Check if String Is Decomposable Into Value-Equal Substrings	Easy
1935	Maximum Number of Words You Can Type	Easy
1936	Add Minimum Number of Rungs	Medium
1937	Maximum Number of Points with Cost	Medium
1938	Maximum Genetic Difference Query	Hard
1940	Longest Common Subsequence Between Sorted Arrays	Medium
1941	Check if All Characters Have Equal Number of Occurrences	Easy
1942	The Number of the Smallest Unoccupied Chair	Medium
1943	Describe the Painting	Medium
1944	Number of Visible People in a Queue	Hard
1945	Sum of Digits of String After Convert	Easy
1946	Largest Number After Mutating Substring	Medium
1947	Maximum Compatibility Score Sum	Medium
1948	Delete Duplicate Folders in System	Hard
1950	Maximum of Minimum Values in All Subarrays	Medium
1952	Three Divisors	Easy
1953	Maximum Number of Weeks for Which You Can Work	Medium
1954	Minimum Garden Perimeter to Collect Enough Apples	Medium
1955	Count Number of Special Subsequences	Hard
1956	Minimum Time For K Virus Variants to Spread	Hard
1957	Delete Characters to Make Fancy String	Easy
1958	Check if Move is Legal	Medium
1959	Minimum Total Space Wasted With K Resizing Operations	Medium
1960	Maximum Product of the Length of Two Palindromic Substrings	Hard
1961	Check If String Is a Prefix of Array	Easy
1962	Remove Stones to Minimize the Total	Medium
1963	Minimum Number of Swaps to Make the String Balanced	Medium
1964	Find the Longest Valid Obstacle Course at Each Position	Hard
1966	Binary Searchable Numbers in an Unsorted Array	Medium
1967	Number of Strings That Appear as Substrings in Word	Easy
1968	Array With Elements Not Equal to Average of Neighbors	Medium
1969	Minimum Non-Zero Product of the Array Elements	Medium
1970	Last Day Where You Can Still Cross	Hard
1971	Find if Path Exists in Graph	Easy
1973	Count Nodes Equal to Sum of Descendants	Medium
1974	Minimum Time to Type Word Using Special Typewriter	Easy
1975	Maximum Matrix Sum	Medium
1976	Number of Ways to Arrive at Destination	Medium
1977	Number of Ways to Separate Numbers	Hard
1979	Find Greatest Common Divisor of Array	Easy
1980	Find Unique Binary String	Medium
1981	Minimize the Difference Between Target and Chosen Elements	Medium
1982	Find Array Given Subset Sums	Hard
1983	Widest Pair of Indices With Equal Range Sum	Medium
1984	Minimum Difference Between Highest and Lowest of K Scores	Easy
1985	Find the Kth Largest Integer in the Array	Medium
1986	Minimum Number of Work Sessions to Finish the Tasks	Medium
1987	Number of Unique Good Subsequences	Hard
1989	Maximum Number of People That Can Be Caught in Tag	Medium
1991	Find the Middle Index in Array	Easy
1992	Find All Groups of Farmland	Medium
1993	Operations on Tree	Medium
1994	The Number of Good Subsets	Hard
1995	Count Special Quadruplets	Easy
1996	The Number of Weak Characters in the Game	Medium
1997	First Day Where You Have Been in All the Rooms	Medium
1998	GCD Sort of an Array	Hard
1999	Smallest Greater Multiple Made of Two Digits	Medium
2000	Reverse Prefix of Word	Easy
2001	Number of Pairs of Interchangeable Rectangles	Medium
2002	Maximum Product of the Length of Two Palindromic Subsequences	Medium
2003	Smallest Missing Genetic Value in Each Subtree	Hard
2005	Subtree Removal Game with Fibonacci Tree	Hard
2006	Count Number of Pairs With Absolute Difference K	Easy
2007	Find Original Array From Doubled Array	Medium
2008	Maximum Earnings From Taxi	Medium
2009	Minimum Number of Operations to Make Array Continuous	Hard
2011	Final Value of Variable After Performing Operations	Easy
2012	Sum of Beauty in the Array	Medium
2013	Detect Squares	Medium
2014	Longest Subsequence Repeated k Times	Hard
2015	Average Height of Buildings in Each Segment	Medium
2016	Maximum Difference Between Increasing Elements	Easy
2017	Grid Game	Medium
2018	Check if Word Can Be Placed In Crossword	Medium
2019	The Score of Students Solving Math Expression	Hard
2021	Brightest Position on Street	Medium
2022	Convert 1D Array Into 2D Array	Easy
2023	Number of Pairs of Strings With Concatenation Equal to Target	Medium
2024	Maximize the Confusion of an Exam	Medium
2025	Maximum Number of Ways to Partition an Array	Hard
2027	Minimum Moves to Convert String	Easy
2028	Find Missing Observations	Medium
2029	Stone Game IX	Medium
2030	Smallest K-Length Subsequence With Occurrences of a Letter	Hard
2031	Count Subarrays With More Ones Than Zeros	Medium
2032	Two Out of Three	Easy
2033	Minimum Operations to Make a Uni-Value Grid	Medium
2034	Stock Price Fluctuation	Medium
2035	Partition Array Into Two Arrays to Minimize Sum Difference	Hard
2036	Maximum Alternating Subarray Sum	Medium
2037	Minimum Number of Moves to Seat Everyone	Easy
2038	Remove Colored Pieces if Both Neighbors are the Same Color	Medium
2039	The Time When the Network Becomes Idle	Medium
2040	Kth Smallest Product of Two Sorted Arrays	Hard
2042	Check if Numbers Are Ascending in a Sentence	Easy
2043	Simple Bank System	Medium
2044	Count Number of Maximum Bitwise-OR Subsets	Medium
2045	Second Minimum Time to Reach Destination	Hard
2046	Sort Linked List Already Sorted Using Absolute Values	Medium
2047	Number of Valid Words in a Sentence	Easy
2048	Next Greater Numerically Balanced Number	Medium
2049	Count Nodes With the Highest Score	Medium
2050	Parallel Courses III	Hard
2052	Minimum Cost to Separate Sentence Into Rows	Medium
2053	Kth Distinct String in an Array	Medium
2054	Two Best Non-Overlapping Events	Medium
2055	Plates Between Candles	Medium
2056	Number of Valid Move Combinations On Chessboard	Hard
2057	Smallest Index With Equal Value	Easy
2058	Find the Minimum and Maximum Number of Nodes Between Critical Points	Medium
2059	Minimum Operations to Convert Number	Medium
2060	Check if an Original String Exists Given Two Encoded Strings	Hard
2061	Number of Spaces Cleaning Robot Cleaned	Medium
2062	Count Vowel Substrings of a String	Easy
2063	Vowels of All Substrings	Medium
2064	Minimized Maximum of Products Distributed to Any Store	Medium
2065	Maximum Path Quality of a Graph	Hard
2067	Number of Equal Count Substrings	Medium
2068	Check Whether Two Strings are Almost Equivalent	Easy
2069	Walking Robot Simulation II	Medium
2070	Most Beautiful Item for Each Query	Medium
2071	Maximum Number of Tasks You Can Assign	Hard
2073	Time Needed to Buy Tickets	Easy
2074	Reverse Nodes in Even Length Groups	Medium
2075	Decode the Slanted Ciphertext	Medium
2076	Process Restricted Friend Requests	Hard
2077	Paths in Maze That Lead to Same Room	Medium
2078	Two Furthest Houses With Different Colors	Easy
2079	Watering Plants	Medium
2080	Range Frequency Queries	Medium
2081	Sum of k-Mirror Numbers	Hard
2083	Substrings That Begin and End With the Same Letter	Medium
2085	Count Common Words With One Occurrence	Easy
2086	Minimum Number of Food Buckets to Feed the Hamsters	Medium
2087	Minimum Cost Homecoming of a Robot in a Grid	Medium
2088	Count Fertile Pyramids in a Land	Hard
2089	Find Target Indices After Sorting Array	Easy
2090	K Radius Subarray Averages	Medium
2091	Removing Minimum and Maximum From Array	Medium
2092	Find All People With Secret	Hard
2093	Minimum Cost to Reach City With Discounts	Medium
2094	Finding 3-Digit Even Numbers	Easy
2095	Delete the Middle Node of a Linked List	Medium
2096	Step-By-Step Directions From a Binary Tree Node to Another	Medium
2097	Valid Arrangement of Pairs	Hard
2098	Subsequence of Size K With the Largest Even Sum	Medium
2099	Find Subsequence of Length K With the Largest Sum	Medium
2100	Find Good Days to Rob the Bank	Medium
2101	Detonate the Maximum Bombs	Medium
2102	Sequentially Ordinal Rank Tracker	Hard
2103	Rings and Rods	Easy
2104	Sum of Subarray Ranges	Medium
2105	Watering Plants II	Medium
2106	Maximum Fruits Harvested After at Most K Steps	Hard
2107	Number of Unique Flavors After Sharing K Candies	Medium
2108	Find First Palindromic String in the Array	Easy
2109	Adding Spaces to a String	Medium
2110	Number of Smooth Descent Periods of a Stock	Medium
2111	Minimum Operations to Make the Array K-Increasing	Hard
2113	Elements in Array After Removing and Replacing Elements	Medium
2114	Maximum Number of Words Found in Sentences	Easy
2115	Find All Possible Recipes from Given Supplies	Medium
2116	Check if a Parentheses String Can Be Valid	Medium
2117	Abbreviating the Product of a Range	Hard
2119	A Number After a Double Reversal	Easy
2120	Execution of All Suffix Instructions Staying in a Grid	Medium
2121	Intervals Between Identical Elements	Medium
2122	Recover the Original Array	Hard
2123	Minimum Operations to Remove Adjacent Ones in Matrix	Hard
2124	Check if All A's Appears Before All B's	Easy
2125	Number of Laser Beams in a Bank	Medium
2126	Destroying Asteroids	Medium
2127	Maximum Employees to Be Invited to a Meeting	Hard
2128	Remove All Ones With Row and Column Flips	Medium
2129	Capitalize the Title	Easy
2130	Maximum Twin Sum of a Linked List	Medium
2131	Longest Palindrome by Concatenating Two Letter Words	Medium
2132	Stamping the Grid	Hard
2133	Check if Every Row and Column Contains All Numbers	Easy
2134	Minimum Swaps to Group All 1's Together II	Medium
2135	Count Words Obtained After Adding a Letter	Medium
2136	Earliest Possible Day of Full Bloom	Hard
2137	Pour Water Between Buckets to Make Water Levels Equal	Medium
2138	Divide a String Into Groups of Size k	Easy
2139	Minimum Moves to Reach Target Score	Medium
2140	Solving Questions With Brainpower	Medium
2141	Maximum Running Time of N Computers	Hard
2143	Choose Numbers From Two Arrays in Range	Hard
2144	Minimum Cost of Buying Candies With Discount	Easy
2145	Count the Hidden Sequences	Medium
2146	K Highest Ranked Items Within a Price Range	Medium
2147	Number of Ways to Divide a Long Corridor	Hard
2148	Count Elements With Strictly Smaller and Greater Elements	Easy
2149	Rearrange Array Elements by Sign	Medium
2150	Find All Lonely Numbers in the Array	Medium
2151	Maximum Good People Based on Statements	Hard
2152	Minimum Number of Lines to Cover Points	Medium
2154	Keep Multiplying Found Values by Two	Easy
2155	All Divisions With the Highest Score of a Binary Array	Medium
2156	Find Substring With Given Hash Value	Hard
2157	Groups of Strings	Hard
2158	Amount of New Area Painted Each Day	Hard
2160	Minimum Sum of Four Digit Number After Splitting Digits	Easy
2161	Partition Array According to Given Pivot	Medium
2162	Minimum Cost to Set Cooking Time	Medium
2163	Minimum Difference in Sums After Removal of Elements	Hard
2164	Sort Even and Odd Indices Independently	Easy
2165	Smallest Value of the Rearranged Number	Medium
2166	Design Bitset	Medium
2167	Minimum Time to Remove All Cars Containing Illegal Goods	Hard
2168	Unique Substrings With Equal Digit Frequency	Medium
2169	Count Operations to Obtain Zero	Easy
2170	Minimum Operations to Make the Array Alternating	Medium
2171	Removing Minimum Number of Magic Beans	Medium
2172	Maximum AND Sum of Array	Hard
2174	Remove All Ones With Row and Column Flips II	Medium
2176	Count Equal and Divisible Pairs in an Array	Easy
2177	Find Three Consecutive Integers That Sum to a Given Number	Medium
2178	Maximum Split of Positive Even Integers	Medium
2179	Count Good Triplets in an Array	Hard
2180	Count Integers With Even Digit Sum	Easy
2181	Merge Nodes in Between Zeros	Medium
2182	Construct String With Repeat Limit	Medium
2183	Count Array Pairs Divisible by K	Hard
2184	Number of Ways to Build Sturdy Brick Wall	Medium
2185	Counting Words With a Given Prefix	Easy
2186	Minimum Number of Steps to Make Two Strings Anagram II	Medium
2187	Minimum Time to Complete Trips	Medium
2188	Minimum Time to Finish the Race	Hard
2189	Number of Ways to Build House of Cards	Medium
2190	Most Frequent Number Following Key In an Array	Easy
2191	Sort the Jumbled Numbers	Medium
2192	All Ancestors of a Node in a Directed Acyclic Graph	Medium
2193	Minimum Number of Moves to Make Palindrome	Hard
2194	Cells in a Range on an Excel Sheet	Easy
2195	Append K Integers With Minimal Sum	Medium
2196	Create Binary Tree From Descriptions	Medium
2197	Replace Non-Coprime Numbers in Array	Hard
2198	Number of Single Divisor Triplets	Medium
2200	Find All K-Distant Indices in an Array	Easy
2201	Count Artifacts That Can Be Extracted	Medium
2202	Maximize the Topmost Element After K Moves	Medium
2203	Minimum Weighted Subgraph With the Required Paths	Hard
2204	Distance to a Cycle in Undirected Graph	Hard
2206	Divide Array Into Equal Pairs	Easy
2207	Maximize Number of Subsequences in a String	Medium
2208	Minimum Operations to Halve Array Sum	Medium
2209	Minimum White Tiles After Covering With Carpets	Hard
2210	Count Hills and Valleys in an Array	Easy
2211	Count Collisions on a Road	Medium
2212	Maximum Points in an Archery Competition	Medium
2213	Longest Substring of One Repeating Character	Hard
2214	Minimum Health to Beat Game	Medium
2215	Find the Difference of Two Arrays	Easy
2216	Minimum Deletions to Make Array Beautiful	Medium
2217	Find Palindrome With Fixed Length	Medium
2218	Maximum Value of K Coins From Piles	Hard
2219	Maximum Sum Score of Array	Medium
2220	Minimum Bit Flips to Convert Number	Easy
2221	Find Triangular Sum of an Array	Medium
2222	Number of Ways to Select Buildings	Medium
2223	Sum of Scores of Built Strings	Hard
2224	Minimum Number of Operations to Convert Time	Easy
2225	Find Players With Zero or One Losses	Medium
2226	Maximum Candies Allocated to K Children	Medium
2227	Encrypt and Decrypt Strings	Hard
2229	Check if an Array Is Consecutive	Easy
2231	Largest Number After Digit Swaps by Parity	Easy
2232	Minimize Result by Adding Parentheses to Expression	Medium
2233	Maximum Product After K Increments	Medium
2234	Maximum Total Beauty of the Gardens	Hard
2235	Add Two Integers	Easy
2236	Root Equals Sum of Children	Easy
2237	Count Positions on Street With Required Brightness	Medium
2239	Find Closest Number to Zero	Easy
2240	Number of Ways to Buy Pens and Pencils	Medium
2241	Design an ATM Machine	Medium
2242	Maximum Score of a Node Sequence	Hard
2243	Calculate Digit Sum of a String	Easy
2244	Minimum Rounds to Complete All Tasks	Medium
2245	Maximum Trailing Zeros in a Cornered Path	Medium
2246	Longest Path With Different Adjacent Characters	Hard
2247	Maximum Cost of Trip With K Highways	Hard
2248	Intersection of Multiple Arrays	Easy
2249	Count Lattice Points Inside a Circle	Medium
2250	Count Number of Rectangles Containing Each Point	Medium
2251	Number of Flowers in Full Bloom	Hard
2254	Design Video Sharing Platform	Hard
2255	Count Prefixes of a Given String	Easy
2256	Minimum Average Difference	Medium
2257	Count Unguarded Cells in the Grid	Medium
2258	Escape the Spreading Fire	Hard
2259	Remove Digit From Number to Maximize Result	Easy
2260	Minimum Consecutive Cards to Pick Up	Medium
2261	K Divisible Elements Subarrays	Medium
2262	Total Appeal of A String	Hard
2263	Make Array Non-decreasing or Non-increasing	Hard
2264	Largest 3-Same-Digit Number in String	Easy
2265	Count Nodes Equal to Average of Subtree	Medium
2266	Count Number of Texts	Medium
2267	Check if There Is a Valid Parentheses String Path	Hard
2268	Minimum Number of Keypresses	Medium
2269	Find the K-Beauty of a Number	Easy
2270	Number of Ways to Split Array	Medium
2271	Maximum White Tiles Covered by a Carpet	Medium
2272	Substring With Largest Variance	Hard
2273	Find Resultant Array After Removing Anagrams	Easy
2274	Maximum Consecutive Floors Without Special Floors	Medium
2275	Largest Combination With Bitwise AND Greater Than Zero	Medium
2276	Count Integers in Intervals	Hard
2277	Closest Node to Path in Tree	Hard
2278	Percentage of Letter in String	Easy
2279	Maximum Bags With Full Capacity of Rocks	Medium
2280	Minimum Lines to Represent a Line Chart	Medium
2281	Sum of Total Strength of Wizards	Hard
2282	Number of People That Can Be Seen in a Grid	Medium
2283	Check if Number Has Equal Digit Count and Digit Value	Easy
2284	Sender With Largest Word Count	Medium
2285	Maximum Total Importance of Roads	Medium
2286	Booking Concert Tickets in Groups	Hard
2287	Rearrange Characters to Make Target String	Easy
2288	Apply Discount to Prices	Medium
2289	Steps to Make Array Non-decreasing	Medium
2290	Minimum Obstacle Removal to Reach Corner	Hard
2291	Maximum Profit From Trading Stocks	Medium
2293	Min Max Game	Easy
2294	Partition Array Such That Maximum Difference Is K	Medium
2295	Replace Elements in an Array	Medium
2296	Design a Text Editor	Hard
2297	Jump Game VIII	Medium
2299	Strong Password Checker II	Easy
2300	Successful Pairs of Spells and Potions	Medium
2301	Match Substring After Replacement	Hard
2302	Count Subarrays With Score Less Than K	Hard
2303	Calculate Amount Paid in Taxes	Easy
2304	Minimum Path Cost in a Grid	Medium
2305	Fair Distribution of Cookies	Medium
2306	Naming a Company	Hard
2307	Check for Contradictions in Equations	Hard
2309	Greatest English Letter in Upper and Lower Case	Easy
2310	Sum of Numbers With Units Digit K	Medium
2311	Longest Binary Subsequence Less Than or Equal to K	Medium
2312	Selling Pieces of Wood	Hard
2313	Minimum Flips in Binary Tree to Get Result	Hard
2315	Count Asterisks	Easy
2316	Count Unreachable Pairs of Nodes in an Undirected Graph	Medium
2317	Maximum XOR After Operations	Medium
2318	Number of Distinct Roll Sequences	Hard
2319	Check if Matrix Is X-Matrix	Easy
2320	Count Number of Ways to Place Houses	Medium
2321	Maximum Score Of Spliced Array	Hard
2322	Minimum Score After Removals on a Tree	Hard
2323	Find Minimum Time to Finish All Jobs II	Medium
2325	Decode the Message	Easy
2326	Spiral Matrix IV	Medium
2327	Number of People Aware of a Secret	Medium
2328	Number of Increasing Paths in a Grid	Hard
2330	Valid Palindrome IV	Medium
2331	Evaluate Boolean Binary Tree	Easy
2332	The Latest Time to Catch a Bus	Medium
2333	Minimum Sum of Squared Difference	Medium
2334	Subarray With Elements Greater Than Varying Threshold	Hard
2335	Minimum Amount of Time to Fill Cups	Easy
2336	Smallest Number in Infinite Set	Medium
2337	Move Pieces to Obtain a String	Medium
2338	Count the Number of Ideal Arrays	Hard
2340	Minimum Adjacent Swaps to Make a Valid Array	Medium
2341	Maximum Number of Pairs in Array	Easy
2342	Max Sum of a Pair With Equal Sum of Digits	Medium
2343	Query Kth Smallest Trimmed Number	Medium
2344	Minimum Deletions to Make Array Divisible	Hard
2345	Finding the Number of Visible Mountains	Medium
2347	Best Poker Hand	Easy
2348	Number of Zero-Filled Subarrays	Medium
2349	Design a Number Container System	Medium
2350	Shortest Impossible Sequence of Rolls	Hard
2351	First Letter to Appear Twice	Easy
2352	Equal Row and Column Pairs	Medium
2353	Design a Food Rating System	Medium
2354	Number of Excellent Pairs	Hard
2355	Maximum Number of Books You Can Take	Hard
2357	Make Array Zero by Subtracting Equal Amounts	Easy
2358	Maximum Number of Groups Entering a Competition	Medium
2359	Find Closest Node to Given Two Nodes	Medium
2360	Longest Cycle in a Graph	Hard
2361	Minimum Costs Using the Train Line	Hard
2363	Merge Similar Items	Easy
2364	Count Number of Bad Pairs	Medium
2365	Task Scheduler II	Medium
2366	Minimum Replacements to Sort the Array	Hard
2367	Number of Arithmetic Triplets	Easy
2368	Reachable Nodes With Restrictions	Medium
2369	Check if There is a Valid Partition For The Array	Medium
2370	Longest Ideal Subsequence	Medium
2371	Minimize Maximum Value in a Grid	Hard
2373	Largest Local Values in a Matrix	Easy
2374	Node With Highest Edge Score	Medium
2375	Construct Smallest Number From DI String	Medium
2376	Count Special Integers	Hard
2378	Choose Edges to Maximize Score in a Tree	Medium
2379	Minimum Recolors to Get K Consecutive Black Blocks	Easy
2380	Time Needed to Rearrange a Binary String	Medium
2381	Shifting Letters II	Medium
2382	Maximum Segment Sum After Removals	Hard
2383	Minimum Hours of Training to Win a Competition	Easy
2384	Largest Palindromic Number	Medium
2385	Amount of Time for Binary Tree to Be Infected	Medium
2386	Find the K-Sum of an Array	Hard
2387	Median of a Row Wise Sorted Matrix	Medium
2389	Longest Subsequence With Limited Sum	Easy
2390	Removing Stars From a String	Medium
2391	Minimum Amount of Time to Collect Garbage	Medium
2392	Build a Matrix With Conditions	Hard
2393	Count Strictly Increasing Subarrays	Medium
2395	Find Subarrays With Equal Sum	Easy
2396	Strictly Palindromic Number	Medium
2397	Maximum Rows Covered by Columns	Medium
2398	Maximum Number of Robots Within Budget	Hard
2399	Check Distances Between Same Letters	Easy
2400	Number of Ways to Reach a Position After Exactly k Steps	Medium
2401	Longest Nice Subarray	Medium
2402	Meeting Rooms III	Hard
2403	Minimum Time to Kill All Monsters	Hard
2404	Most Frequent Even Element	Easy
2405	Optimal Partition of String	Medium
2406	Divide Intervals Into Minimum Number of Groups	Medium
2407	Longest Increasing Subsequence II	Hard
2408	Design SQL	Medium
2409	Count Days Spent Together	Easy
2410	Maximum Matching of Players With Trainers	Medium
2411	Smallest Subarrays With Maximum Bitwise OR	Medium
2412	Minimum Money Required Before Transactions	Hard
2413	Smallest Even Multiple	Easy
2414	Length of the Longest Alphabetical Continuous Substring	Medium
2415	Reverse Odd Levels of Binary Tree	Medium
2416	Sum of Prefix Scores of Strings	Hard
2417	Closest Fair Integer	Medium
2418	Sort the People	Easy
2419	Longest Subarray With Maximum Bitwise AND	Medium
2420	Find All Good Indices	Medium
2421	Number of Good Paths	Hard
2422	Merge Operations to Turn Array Into a Palindrome	Medium
2425	Bitwise XOR of All Pairings	Medium
2426	Number of Pairs Satisfying Inequality	Hard
2427	Number of Common Factors	Easy
2428	Maximum Sum of an Hourglass	Medium
2429	Minimize XOR	Medium
2431	Maximize Total Tastiness of Purchased Fruits	Medium
2432	The Employee That Worked on the Longest Task	Easy
2433	Find The Original Array of Prefix Xor	Medium
2434	Using a Robot to Print the Lexicographically Smallest String	Medium
2435	Paths in Matrix Whose Sum Is Divisible by K	Hard
2436	Minimum Split Into Subarrays With GCD Greater Than One	Medium
2437	Number of Valid Clock Times	Easy
2438	Range Product Queries of Powers	Medium
2439	Minimize Maximum of Array	Medium
2440	Create Components With Same Value	Hard
2441	Largest Positive Integer That Exists With Its Negative	Easy
2442	Count Number of Distinct Integers After Reverse Operations	Medium
2443	Sum of Number and Its Reverse	Medium
2444	Count Subarrays With Fixed Bounds	Hard
2445	Number of Nodes With Value One	Medium
2446	Determine if Two Events Have Conflict	Easy
2447	Number of Subarrays With GCD Equal to K	Medium
2448	Minimum Cost to Make Array Equal	Hard
2449	Minimum Number of Operations to Make Arrays Similar	Hard
2450	Number of Distinct Binary Strings After Applying Operations	Medium
2451	Odd String Difference	Easy
2452	Words Within Two Edits of Dictionary	Medium
2453	Destroy Sequential Targets	Medium
2455	Average Value of Even Numbers That Are Divisible by Three	Easy
2456	Most Popular Video Creator	Medium
2458	Height of Binary Tree After Subtree Removal Queries	Hard
2459	Sort Array by Moving Items to Empty Space	Hard
2460	Apply Operations to an Array	Easy
2461	Maximum Sum of Distinct Subarrays With Length K	Medium
2462	Total Cost to Hire K Workers	Medium
2463	Minimum Total Distance Traveled	Hard
2464	Minimum Subarrays in a Valid Split	Medium
2465	Number of Distinct Averages	Easy
2466	Count Ways To Build Good Strings	Medium
2467	Most Profitable Path in a Tree	Medium
2468	Split Message Based on Limit	Hard
2469	Convert the Temperature	Easy
2470	Number of Subarrays With LCM Equal to K	Medium
2471	Minimum Number of Operations to Sort a Binary Tree by Level	Medium
2472	Maximum Number of Non-overlapping Palindrome Substrings	Hard
2473	Minimum Cost to Buy Apples	Medium
2475	Number of Unequal Triplets in Array	Easy
2476	Closest Nodes Queries in a Binary Search Tree	Medium
2477	Minimum Fuel Cost to Report to the Capital	Medium
2479	Maximum XOR of Two Non-Overlapping Subtrees	Hard
2481	Minimum Cuts to Divide a Circle	Easy
2482	Difference Between Ones and Zeros in Row and Column	Medium
2483	Minimum Penalty for a Shop	Medium
2484	Count Palindromic Subsequences	Hard
2485	Find the Pivot Integer	Easy
2486	Append Characters to String to Make Subsequence	Medium
2487	Remove Nodes From Linked List	Medium
2488	Count Subarrays With Median K	Hard
2489	Number of Substrings With Fixed Ratio	Medium
2490	Circular Sentence	Easy
2491	Divide Players Into Teams of Equal Skill	Medium
2492	Minimum Score of a Path Between Two Cities	Medium
2493	Divide Nodes Into the Maximum Number of Groups	Hard
2495	Number of Subarrays Having Even Product	Medium
2496	Maximum Value of a String in an Array	Easy
2498	Frog Jump II	Medium
2499	Minimum Total Cost to Make Arrays Unequal	Hard
2500	Delete Greatest Value in Each Row	Easy
2501	Longest Square Streak in an Array	Medium
2502	Design Memory Allocator	Medium
2503	Maximum Number of Points From Grid Queries	Hard
2505	Bitwise OR of All Subsequence Sums	Medium
2506	Count Pairs Of Similar Strings	Easy
2507	Smallest Value After Replacing With Sum of Prime Factors	Medium
2509	Cycle Length Queries in a Tree	Hard
2510	Check if There is a Path With Equal Number of 0's And 1's	Medium
2511	Maximum Enemy Forts That Can Be Captured	Easy
2512	Reward Top K Students	Medium
2515	Shortest Distance to Target String in a Circular Array	Easy
2516	Take K of Each Character From Left and Right	Medium
2517	Maximum Tastiness of Candy Basket	Medium
2519	Count the Number of K-Big Indices	Hard
2520	Count the Digits That Divide a Number	Easy
2521	Distinct Prime Factors of Product of Array	Medium
2522	Partition String Into Substrings With Values at Most K	Medium
2523	Closest Prime Numbers in Range	Medium
2524	Maximum Frequency Score of a Subarray	Hard
2527	Find Xor-Beauty of Array	Medium
2529	Maximum Count of Positive Integer and Negative Integer	Easy
2533	Number of Good Binary Strings	Medium
2534	Time Taken to Cross the Door	Hard
2535	Difference Between Element Sum and Digit Sum of an Array	Easy
2536	Increment Submatrices by One	Medium
2537	Count the Number of Good Subarrays	Medium
2539	Count the Number of Good Subsequences	Medium
2540	Minimum Common Value	Easy
2542	Maximum Subsequence Score	Medium
2543	Check if Point Is Reachable	Hard
2544	Alternating Digit Sum	Easy
2545	Sort the Students by Their Kth Score	Medium
2546	Apply Bitwise Operations to Make Strings Equal	Medium
2547	Minimum Cost to Split an Array	Hard
2548	Maximum Price to Fill a Bag	Medium
2549	Count Distinct Numbers on Board	Easy
2551	Put Marbles in Bags	Hard
2553	Separate the Digits in an Array	Easy
2554	Maximum Number of Integers to Choose From a Range I	Medium
2557	Maximum Number of Integers to Choose From a Range II	Medium
2559	Count Vowel Strings in Ranges	Medium
2560	House Robber IV	Medium
2561	Rearranging Fruits	Hard
2562	Find the Array Concatenation Value	Easy
2563	Count the Number of Fair Pairs	Medium
2566	Maximum Difference by Remapping a Digit	Easy
2567	Minimum Score by Changing Two Elements	Medium
2568	Minimum Impossible OR	Medium
2570	Merge Two 2D Arrays by Summing Values	Easy
2571	Minimum Operations to Reduce an Integer to 0	Medium
2574	Left and Right Sum Differences	Easy
2576	Find the Maximum Number of Marked Indices	Medium
2578	Split With Minimum Sum	Easy
2579	Count Total Number of Colored Cells	Medium
2581	Count Number of Possible Root Nodes	Hard
2582	Pass the Pillow	Easy
2583	Kth Largest Sum in a Binary Tree	Medium
2585	Number of Ways to Earn Points	Hard
2586	Count the Number of Vowel Strings in Range	Easy
2587	Rearrange Array to Maximize Prefix Score	Medium
2588	Count the Number of Beautiful Subarrays	Medium
2590	Design a Todo List	Medium
2592	Maximize Greatness of an Array	Medium
2594	Minimum Time to Repair Cars	Medium
2595	Number of Even and Odd Bits	Easy
2596	Check Knight Tour Configuration	Medium
2597	The Number of Beautiful Subsets	Medium
2598	Smallest Missing Non-negative Integer After Operations	Medium
2599	Make the Prefix Sum Non-negative	Medium
2600	K Items With the Maximum Sum	Easy
2601	Prime Subtraction Operation	Medium
2604	Minimum Time to Eat All Grains	Hard
2605	Form Smallest Number From Two Digit Arrays	Easy
2606	Find the Substring With Maximum Cost	Medium
2609	Find the Longest Balanced Substring of a Binary String	Easy
2610	Convert an Array Into a 2D Array With Conditions	Medium
2613	Beautiful Pairs	Hard
2615	Sum of Distances	Medium
2616	Minimize the Maximum Difference of Pairs	Medium
2618	Check if Object Instance of Class	Medium
2619	Array Prototype Last	Easy
2620	Counter	Easy
2621	Sleep	Easy
2622	Cache With Time Limit	Medium
2623	Memoize	Medium
2624	Snail Traversal	Medium
2625	Flatten Deeply Nested Array	Medium
2626	Array Reduce Transformation	Easy
2627	Debounce	Medium
2628	JSON Deep Equal	Medium
2629	Function Composition	Easy
2630	Memoize II	Hard
2631	Group By	Medium
2632	Curry	Medium
2633	Convert Object to JSON String	Medium
2634	Filter Elements from Array	Easy
2635	Apply Transform Over Each Element in Array	Easy
2636	Promise Pool	Medium
2637	Promise Time Limit	Medium
2638	Count the Number of K-Free Subsets	Medium
2639	Find the Width of Columns of a Grid	Easy
2640	Find the Score of All Prefixes of an Array	Medium
2641	Cousins in Binary Tree II	Medium
2643	Row With Maximum Ones	Easy
2644	Find the Maximum Divisibility Score	Easy
2645	Minimum Additions to Make Valid String	Medium
2646	Minimize the Total Price of the Trips	Hard
2647	Color the Triangle Red	Hard
2648	Generate Fibonacci Sequence	Easy
2649	Nested Array Generator	Medium
2650	Design Cancellable Function	Hard
2651	Calculate Delayed Arrival Time	Easy
2652	Sum Multiples	Easy
2655	Find Maximal Uncovered Ranges	Medium
2656	Maximum Sum With Exactly K Elements	Easy
2657	Find the Prefix Common Array of Two Arrays	Medium
2658	Maximum Number of Fish in a Grid	Medium
2661	First Completely Painted Row or Column	Medium
2664	The Knight’s Tour	Medium
2665	Counter II	Easy
2666	Allow One Function Call	Easy
2667	Create Hello World Function	Easy
2670	Find the Distinct Difference Array	Easy
2672	Number of Adjacent Elements With the Same Color	Medium
2673	Make Costs of Paths Equal in a Binary Tree	Medium
2674	Split a Circular Linked List	Medium
2675	Array of Objects to Matrix	Hard
2676	Throttle	Medium
2677	Chunk Array	Easy
2678	Number of Senior Citizens	Easy
2680	Maximum OR	Medium
2682	Find the Losers of the Circular Game	Easy
2683	Neighboring Bitwise XOR	Medium
2684	Maximum Number of Moves in a Grid	Medium
2685	Count the Number of Complete Components	Medium
2689	Extract Kth Character From The Rope Tree	Easy
2690	Infinite Method Object	Easy
2691	Immutability Helper	Hard
2692	Make Object Immutable	Medium
2693	Call Function with Custom Context	Medium
2694	Event Emitter	Medium
2695	Array Wrapper	Easy
2696	Minimum String Length After Removing Substrings	Easy
2697	Lexicographically Smallest Palindrome	Easy
2698	Find the Punishment Number of an Integer	Medium
2700	Differences Between Two Objects	Medium
2702	Minimum Operations to Make Numbers Non-positive	Hard
2703	Return Length of Arguments Passed	Easy
2704	To Be Or Not To Be	Easy
2705	Compact Object	Medium
2706	Buy Two Chocolates	Easy
2707	Extra Characters in a String	Medium
2709	Greatest Common Divisor Traversal	Hard
2710	Remove Trailing Zeros From a String	Easy
2711	Difference of Number of Distinct Values on Diagonals	Medium
2712	Minimum Cost to Make All Characters Equal	Medium
2714	Find Shortest Path with K Hops	Hard
2715	Timeout Cancellation	Easy
2716	Minimize String Length	Easy
2717	Semi-Ordered Permutation	Easy
2721	Execute Asynchronous Functions in Parallel	Medium
2722	Join Two Arrays by ID	Medium
2723	Add Two Promises	Easy
2724	Sort By	Easy
2725	Interval Cancellation	Easy
2726	Calculator with Method Chaining	Easy
2727	Is Object Empty	Easy
2728	Count Houses in a Circular Street	Easy
2729	Check if The Number is Fascinating	Easy
2732	Find a Good Subset of the Matrix	Hard
2733	Neither Minimum nor Maximum	Easy
2737	Find the Closest Marked Node	Medium
2739	Total Distance Traveled	Easy
2740	Find the Value of the Partition	Medium
2742	Painting the Walls	Hard
2743	Count Substrings Without Repeating Character	Medium
2744	Find Maximum Number of String Pairs	Easy
2745	Construct the Longest New String	Medium
2748	Number of Beautiful Pairs	Easy
2749	Minimum Operations to Make the Integer Zero	Medium
2751	Robot Collisions	Hard
2753	Count Houses in a Circular Street II	Hard
2754	Bind Function to Context	Medium
2755	Deep Merge of Two Objects	Medium
2756	Query Batching	Hard
2757	Generate Circular Array Values	Medium
2758	Next Day	Easy
2759	Convert JSON String to Object	Hard
2763	Sum of Imbalance Numbers of All Subarrays	Hard
2764	Is Array a Preorder of Some ‌Binary Tree	Medium
2766	Relocate Marbles	Medium
2767	Partition String Into Minimum Beautiful Substrings	Medium
2769	Find the Maximum Achievable Number	Easy
2773	Height of Special Binary Tree	Medium
2774	Array Upper Bound	Easy
2775	Undefined to Null	Medium
2776	Convert Callback Based Function to Promise Based Function	Medium
2777	Date Range Generator	Medium
2778	Sum of Squares of Special Elements	Easy
2779	Maximum Beauty of an Array After Applying Operation	Medium
2780	Minimum Index of a Valid Split	Medium
2782	Number of Unique Categories	Medium
2784	Check if Array is Good	Easy
2785	Sort Vowels in a String	Medium
2787	Ways to Express an Integer as Sum of Powers	Medium
2788	Split Strings by Separator	Easy
2789	Largest Element in an Array after Merge Operations	Medium
2791	Count Paths That Can Form a Palindrome in a Tree	Hard
2792	Count Nodes That Are Great Enough	Hard
2794	Create Object from Two Arrays	Easy
2795	Parallel Execution of Promises for Individual Results Retrieval	Medium
2796	Repeat String	Easy
2797	Partial Function with Placeholders	Easy
2798	Number of Employees Who Met the Target	Easy
2799	Count Complete Subarrays in an Array	Medium
2802	Find The K-th Lucky Number	Medium
2803	Factorial Generator	Easy
2804	Array Prototype ForEach	Easy
2805	Custom Interval	Medium
2806	Account Balance After Rounded Purchase	Easy
2807	Insert Greatest Common Divisors in Linked List	Medium
2810	Faulty Keyboard	Easy
2814	Minimum Time Takes to Reach Destination Without Drowning	Hard
2815	Max Pair Sum in an Array	Easy
2816	Double a Number Represented as a Linked List	Medium
2818	Apply Operations to Maximize Score	Hard
2819	Minimum Relative Loss After Buying Chocolates	Hard
2821	Delay the Resolution of Each Promise	Medium
2822	Inversion of Object	Easy
2823	Deep Object Filter	Medium
2824	Count Pairs Whose Sum is Less than Target	Easy
2825	Make String a Subsequence Using Cyclic Increments	Medium
2826	Sorting Three Groups	Medium
2828	Check if a String Is an Acronym of Words	Easy
2829	Determine the Minimum Sum of a k-avoiding Array	Medium
2832	Maximal Range That Each Element Is Maximum in It	Medium
2833	Furthest Point From Origin	Easy
2838	Maximum Coins Heroes Can Collect	Medium
2839	Check if Strings Can be Made Equal With Operations I	Easy
2840	Check if Strings Can be Made Equal With Operations II	Medium
2841	Maximum Sum of Almost Unique Subarray	Medium
2843	Count Symmetric Integers	Easy
2845	Count of Interesting Subarrays	Medium
2846	Minimum Edge Weight Equilibrium Queries in a Tree	Hard
2847	Smallest Number With Given Digit Product	Medium
2848	Points That Intersect With Cars	Easy
2850	Minimum Moves to Spread Stones Over Grid	Medium
2852	Sum of Remoteness of All Cells	Medium
2855	Minimum Right Shifts to Sort the Array	Easy
2858	Minimum Edge Reversals So Every Node Is Reachable	Hard
2859	Sum of Values at Indices With K Set Bits	Easy
2860	Happy Students	Medium
2862	Maximum Element-Sum of a Complete Subset of Indices	Hard
2863	Maximum Length of Semi-Decreasing Subarrays	Medium
2864	Maximum Odd Binary Number	Easy
2865	Beautiful Towers I	Medium
2868	The Wording Game	Hard
2869	Minimum Operations to Collect Elements	Easy
2870	Minimum Number of Operations to Make Array Empty	Medium
2871	Split Array Into Maximum Number of Subarrays	Medium
2872	Maximum Number of K-Divisible Components	Hard
2873	Maximum Value of an Ordered Triplet I	Easy
2874	Maximum Value of an Ordered Triplet II	Medium
2892	Minimizing Array After Replacing Pairs With Their Product	Medium
2894	Divisible and Non-divisible Sums Difference	Easy
2895	Minimum Processing Time	Medium
2897	Apply Operations on Array to Maximize Sum of Squares	Hard
2898	Maximum Linear Stock Score	Medium
2899	Last Visited Integers	Easy
2900	Longest Unequal Adjacent Groups Subsequence I	Easy
2901	Longest Unequal Adjacent Groups Subsequence II	Medium
2903	Find Indices With Index and Value Difference I	Easy
2904	Shortest and Lexicographically Smallest Beautiful String	Medium
2907	Maximum Profitable Triplets With Increasing Prices I	Medium
2908	Minimum Sum of Mountain Triplets I	Easy
2909	Minimum Sum of Mountain Triplets II	Medium
2912	Number of Ways to Reach Destination in the Grid	Hard
2913	Subarrays Distinct Element Sum of Squares I	Easy
2914	Minimum Number of Changes to Make Binary String Beautiful	Medium
2917	Find the K-or of an Array	Easy
2918	Minimum Equal Sum of Two Arrays After Replacing Zeros	Medium
2921	Maximum Profitable Triplets With Increasing Prices II	Hard
2923	Find Champion I	Easy
2924	Find Champion II	Medium
2925	Maximum Score After Applying Operations on a Tree	Medium
2927	Distribute Candies Among Children III	Hard
2928	Distribute Candies Among Children I	Easy
2929	Distribute Candies Among Children II	Medium
2932	Maximum Strong Pair XOR I	Easy
2933	High-Access Employees	Medium
2934	Minimum Operations to Maximize Last Elements in Arrays	Medium
2936	Number of Equal Numbers Blocks	Medium
2937	Make Three Strings Equal	Easy
2938	Separate Black and White Balls	Medium
2941	Maximum GCD-Sum of a Subarray	Hard
2942	Find Words Containing Character	Easy
2946	Matrix Similarity After Cyclic Shifts	Easy
2947	Count Beautiful Substrings I	Medium
2948	Make Lexicographically Smallest Array by Swapping Elements	Medium
2950	Number of Divisible Substrings	Medium
2951	Find the Peaks	Easy
2952	Minimum Number of Coins to be Added	Medium
2955	Number of Same-End Substrings	Medium
2956	Find Common Elements Between Two Arrays	Easy
2957	Remove Adjacent Almost-Equal Characters	Medium
2958	Length of Longest Subarray With at Most K Frequency	Medium
2960	Count Tested Devices After Test Operations	Easy
2961	Double Modular Exponentiation	Medium
2962	Count Subarrays Where Max Element Appears at Least K Times	Medium
2963	Count the Number of Good Partitions	Hard
2964	Number of Divisible Triplet Sums	Medium
2965	Find Missing and Repeated Values	Easy
2966	Divide Array Into Arrays With Max Difference	Medium
2969	Minimum Number of Coins for Fruits II	Hard
2970	Count the Number of Incremovable Subarrays I	Easy
2971	Find Polygon With the Largest Perimeter	Medium
2976	Minimum Cost to Convert String I	Medium
2979	Most Expensive Item That Can Not Be Bought	Medium
2980	Check if Bitwise OR Has Trailing Zeros	Easy
2981	Find Longest Special Substring That Occurs Thrice I	Medium
2992	Number of Self-Divisible Permutations	Medium
2997	Minimum Number of Operations to Make Array XOR Equal to K	Medium
2998	Minimum Number of Operations to Make X and Y Equal	Medium
2999	Count the Number of Powerful Integers	Hard
3000	Maximum Area of Longest Diagonal Rectangle	Easy
3002	Maximum Size of a Set After Removals	Medium
3004	Maximum Subtree of the Same Color	Medium
3005	Count Elements With Maximum Frequency	Easy
3009	Maximum Number of Intersections on the Chart	Hard
3010	Divide an Array Into Subarrays With Minimum Cost I	Easy
3011	Find if Array Can Be Sorted	Medium
3014	Minimum Number of Pushes to Type Word I	Easy
3015	Count the Number of Houses at a Certain Distance I	Medium
3016	Minimum Number of Pushes to Type Word II	Medium
3018	Maximum Number of Removal Queries That Can Be Processed I	Hard
3019	Number of Changing Keys	Easy
3021	Alice and Bob Playing Flower Game	Medium
3023	Find Pattern in Infinite Stream I	Medium
3024	Type of Triangle	Easy
3025	Find the Number of Ways to Place People I	Medium
3027	Find the Number of Ways to Place People II	Hard
3028	Ant on the Boundary	Easy
3029	Minimum Time to Revert Word to Initial State I	Medium
3030	Find the Grid of Region Average	Medium
3032	Count Numbers With Unique Digits II	Easy
3033	Modify the Matrix	Easy
3034	Number of Subarrays That Match a Pattern I	Medium
3035	Maximum Palindromes After Operations	Medium
3037	Find Pattern in Infinite Stream II	Hard
3038	Maximum Number of Operations With the Same Score I	Easy
3039	Apply Operations to Make String Empty	Medium
3042	Count Prefix and Suffix Pairs I	Easy
3043	Find the Length of the Longest Common Prefix	Medium
3044	Most Frequent Prime	Medium
3046	Split the Array	Easy
3047	Find the Largest Area of Square Inside Two Rectangles	Medium
3062	Winner of the Linked List Game	Easy
3063	Linked List Frequency	Easy
3064	Guess the Number Using Bitwise Questions I	Medium
3065	Minimum Operations to Exceed Threshold Value I	Easy
3066	Minimum Operations to Exceed Threshold Value II	Medium
3067	Count Pairs of Connectable Servers in a Weighted Tree Network	Medium
3068	Find the Maximum Sum of Node Values	Hard
3069	Distribute Elements Into Two Arrays I	Easy
3070	Count Submatrices with Top-Left Element and Sum Less Than k	Medium
3071	Minimum Operations to Write the Letter Y on a Grid	Medium
3073	Maximum Increasing Triplet Value	Medium
3074	Apple Redistribution into Boxes	Easy
3075	Maximize Happiness of Selected Children	Medium
3076	Shortest Uncommon Substring in an Array	Medium
3078	Match Alphanumerical Pattern in Matrix I	Medium
3079	Find the Sum of Encrypted Integers	Easy
3083	Existence of a Substring in a String and Its Reverse	Easy
3084	Count Substrings Starting and Ending with Given Character	Medium
3085	Minimum Deletions to Make String K-Special	Medium
3088	Make String Anti-palindrome	Hard
3090	Maximum Length Substring With Two Occurrences	Easy
3091	Apply Operations to Make Sum of Array Greater Than or Equal to k	Medium
3094	Guess the Number Using Bitwise Questions II	Medium
3095	Shortest Subarray With OR at Least K I	Easy
3097	Shortest Subarray With OR at Least K II	Medium
3099	Harshad Number	Easy
3100	Water Bottles II	Medium
3104	Find Longest Self-Contained Substring	Hard
3105	Longest Strictly Increasing or Strictly Decreasing Subarray	Easy
3108	Minimum Cost Walk in Weighted Graph	Hard
3109	Find the Index of Permutation	Medium
3110	Score of a String	Easy
3119	Maximum Number of Potholes That Can Be Fixed	Medium
3125	Maximum Number That Makes Result of Bitwise AND Zero	Medium
3135	Equalize Strings by Adding or Removing Characters at Ends	Medium
3136	Valid Word	Easy
3141	Maximum Hamming Distances	Hard
3147	Taking Maximum Energy From the Mystic Dungeon	Medium
3151	Special Array I	Easy
3155	Maximum Number of Upgradable Servers	Medium
3157	Find the Level of Tree with Minimum Sum	Medium
3160	Find the Number of Distinct Colors Among the Balls	Medium
3167	Better Compression of String	Medium
3169	Count Days Without Meetings	Medium
3170	Lexicographically Minimum String After Removing Stars	Medium
3173	Bitwise OR of Adjacent Elements	Easy
3174	Clear Digits	Easy
3178	Find the Child Who Has the Ball After K Seconds	Easy
3183	The Number of Ways to Make the Sum	Medium
3186	Maximum Total Damage With Spell Casting	Medium
3189	Minimum Moves to Get a Peaceful Board	Medium
3191	Minimum Operations to Make Binary Array Elements Equal to One I	Medium
3195	Find the Minimum Area to Cover All Ones I	Medium
3197	Find the Minimum Area to Cover All Ones II	Hard
3199	Count Triplets with Even XOR Set Bits I	Easy
3201	Find the Maximum Length of Valid Subsequence I	Medium
3202	Find the Maximum Length of Valid Subsequence II	Medium
3205	Maximum Array Hopping Score I	Medium
3208	Alternating Groups II	Medium
3215	Count Triplets with Even XOR Set Bits II	Medium
3221	Maximum Array Hopping Score II	Medium
3223	Minimum Length of String After Operations	Medium
3227	Vowels Game in a String	Medium
3231	Minimum Number of Increasing Subsequence to Be Removed	Hard
3237	Alt and Tab Simulation	Medium
3247	Number of Subsequences with Odd Sum	Medium
3253	Construct String with Minimum Cost (Easy)	Medium
3263	Convert Doubly Linked List to Array I	Easy
3269	Constructing Two Increasing Arrays	Hard
3272	Find the Count of Good Integers	Hard
3279	Maximum Total Area Occupied by Pistons	Hard
3284	Sum of Consecutive Subarrays	Medium
3294	Convert Doubly Linked List to Array II	Medium
3299	Sum of Consecutive Subsequences	Hard
3304	Find the K-th Character in String Game I	Easy
3306	Count of Substrings Containing Every Vowel and K Consonants II	Medium
3307	Find the K-th Character in String Game II	Hard
3313	Find the Last Marked Nodes in Tree	Hard
3323	Minimize Connected Groups by Inserting Interval	Medium
3329	Count Substrings With K-Frequency Characters II	Hard
3330	Find the Original Typed String I	Easy
3333	Find the Original Typed String II	Hard
3335	Total Characters in String After Transformations I	Medium
3337	Total Characters in String After Transformations II	Hard
3339	Find the Number of K-Even Arrays	Medium
3341	Find Minimum Time to Reach Last Room I	Medium
3342	Find Minimum Time to Reach Last Room II	Medium
3343	Count Number of Balanced Permutations	Hard
3344	Maximum Sized Array	Medium
3346	Maximum Frequency of an Element After Performing Operations I	Medium
3347	Maximum Frequency of an Element After Performing Operations II	Hard
3349	Adjacent Increasing Subarrays Detection I	Easy
3350	Adjacent Increasing Subarrays Detection II	Medium
3353	Minimum Total Operations	Easy
3355	Zero Array Transformation I	Medium
3356	Zero Array Transformation II	Medium
3359	Find Sorted Submatrices With Maximum Element at Most K	Hard
3362	Zero Array Transformation III	Medium
3363	Find the Maximum Number of Fruits Collected	Hard
3369	Design an Array Statistics Tracker	Hard
3372	Maximize the Number of Target Nodes After Connecting Trees I	Medium
3373	Maximize the Number of Target Nodes After Connecting Trees II	Hard
3375	Minimum Operations to Make Array Values Equal to K	Easy
3383	Minimum Runes to Add to Cast Spell	Hard
3385	Minimum Time to Break Locks II	Hard
3391	Design a 3D Binary Matrix with Efficient Layer Tracking	Medium
3392	Count Subarrays of Length Three With a Condition	Easy
3394	Check if Grid can be Cut into Sections	Medium
3396	Minimum Number of Operations to Make Elements in Array Distinct	Easy
3397	Maximum Number of Distinct Elements After Operations	Medium
3400	Maximum Number of Matching Indices After Right Shifts	Medium
3402	Minimum Operations to Make Columns Strictly Increasing	Easy
3403	Find the Lexicographically Largest String From the Box I	Medium
3405	Count the Number of Arrays with K Matching Adjacent Elements	Hard
3406	Find the Lexicographically Largest String From the Box II	Hard
3408	Design Task Manager	Medium
3416	Subsequences with a Unique Middle Mode II	Hard
3422	Minimum Operations to Make Subarray Elements Equal	Medium
3423	Maximum Difference Between Adjacent Elements in a Circular Array	Easy
3431	Minimum Unlocked Indices to Sort Nums	Medium
3437	Permutations III	Medium
3439	Reschedule Meetings for Maximum Free Time I	Medium
3440	Reschedule Meetings for Maximum Free Time II	Medium
3442	Maximum Difference Between Even and Odd Frequency I	Easy
3443	Maximum Manhattan Distance After K Changes	Medium
3445	Maximum Difference Between Even and Odd Frequency II	Hard
3446	Sort Matrix by Diagonals	Medium
3450	Maximum Students on a Single Bench	Easy
3452	Sum of Good Numbers	Easy
3460	Longest Common Prefix After at Most One Removal	Medium
3461	Check If Digits Are Equal in String After Operations I	Easy
3462	Maximum Sum With at Most K Elements	Medium
3463	Check If Digits Are Equal in String After Operations II	Hard
3464	Maximize the Distance Between Points on a Square	Hard
3466	Maximum Coin Collection	Medium
3476	Maximize Profit from Task Assignment	Medium
3477	Fruits Into Baskets II	Easy
3479	Fruits Into Baskets III	Medium
3480	Maximize Subarrays After Removing One Conflicting Pair	Hard
3481	Apply Substitutions	Medium
3484	Design Spreadsheet	Medium
3487	Maximum Unique Subarray Sum After Deletion	Easy
3491	Phone Number Prefix	Easy
3494	Find the Minimum Amount of Time to Brew Potions	Medium
3495	Minimum Operations to Make Array Elements Zero	Hard
3496	Maximize Score After Pair Deletions	Medium
3506	Find Time Required to Eliminate Bacterial Strains	Hard
3508	Implement Router	Medium
3511	Make a Positive Array	Medium
3516	Find Closest Person	Easy
3520	Minimum Threshold for Inversion Pairs Count	Medium
3535	Unit Conversion II	Medium
3539	Find Sum of Array Product of Magical Sequences	Hard
3541	Find Most Frequent Vowel and Consonant	Easy

License

MIT License

Copyright (c) 2019-2025 Josh Crozier