LeetCode 刷题记录

#	Title	Difficulty	Solution(66/1188)
1	Two Sum	Easy	Python
2	Add Two Numbers	Medium	Python
3	Longest Substring Without Repeating Characters	Medium	Python
4	Median of Two Sorted Arrays	Hard
5	Longest Palindromic Substring	Medium
6	ZigZag Conversion	Medium
7	Reverse Integer	Easy	Python
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	Python
20	Valid Parentheses	Easy
21	Merge Two Sorted Lists	Easy	C++, Python
22	Generate Parentheses	Medium
23	Merge k Sorted Lists	Hard	C++, Python
24	Swap Nodes in Pairs	Medium	Python
25	Reverse Nodes in k-Group	Hard	Python
26	Remove Duplicates from Sorted Array	Easy	C++
27	Remove Element	Easy	C++
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	Easy
39	Combination Sum	Medium
40	Combination Sum II	Medium	Python
41	First Missing Positive	Hard	Python
42	Trapping Rain Water	Hard
43	Multiply Strings	Medium
44	Wildcard Matching	Hard
45	Jump Game II	Hard
46	Permutations	Medium
47	Permutations II	Medium
48	Rotate Image	Medium
49	Group Anagrams	Medium
50	Pow(x, n)	Medium
51	N-Queens	Hard	Python
52	N-Queens II	Hard	Python
53	Maximum Subarray	Easy	Python
54	Spiral Matrix	Medium
55	Jump Game	Medium
56	Merge Intervals	Medium
57	Insert Interval	Hard
58	Length of Last Word	Easy
59	Spiral Matrix II	Medium
60	Permutation Sequence	Medium
61	Rotate List	Medium	Python
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)	Easy
70	Climbing Stairs	Easy	Python
71	Simplify Path	Medium
72	Edit Distance	Hard
73	Set Matrix Zeroes	Medium
74	Search a 2D Matrix	Medium	Python
75	Sort Colors	Medium
76	Minimum Window Substring	Hard
77	Combinations	Medium
78	Subsets	Medium
79	Word Search	Medium	Python
80	Remove Duplicates from Sorted Array II	Medium	C++
81	Search in Rotated Sorted Array II	Medium
82	Remove Duplicates from Sorted List II	Medium	Python
83	Remove Duplicates from Sorted List	Easy	Python
84	Largest Rectangle in Histogram	Hard
85	Maximal Rectangle	Hard
86	Partition List	Medium	Python
87	Scramble String	Hard
88	Merge Sorted Array	Easy	C++
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	Medium
95	Unique Binary Search Trees II	Medium
96	Unique Binary Search Trees	Medium
97	Interleaving String	Hard
98	Validate Binary Search Tree	Medium
99	Recover Binary Search Tree	Hard
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	Easy
108	Convert Sorted Array to Binary Search Tree	Easy	Python
109	Convert Sorted List to Binary Search Tree	Medium	Python
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	Easy
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	Medium
128	Longest Consecutive Sequence	Hard
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	Python
139	Word Break	Medium	Python
140	Word Break II	Hard	Python
141	Linked List Cycle	Easy	Python
142	Linked List Cycle II	Medium	Python
143	Reorder List	Medium	Python
144	Binary Tree Preorder Traversal	Medium
145	Binary Tree Postorder Traversal	Hard
146	LRU Cache	Medium
147	Insertion Sort List	Medium	Python
148	Sort List	Medium	Python
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	Easy
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🔒	Hard
160	Intersection of Two Linked Lists	Easy	Python
161	One Edit Distance🔒	Medium
162	Find Peak Element	Medium
163	Missing Ranges🔒	Medium
164	Maximum Gap	Hard
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	Easy
173	Binary Search Tree Iterator	Medium
174	Dungeon Game	Hard
175	Combine Two Tables	Easy
176	Second Highest Salary	Easy
177	Nth Highest Salary	Medium
178	Rank Scores	Medium
179	Largest Number	Medium
180	Consecutive Numbers	Medium
181	Employees Earning More Than Their Managers	Easy
182	Duplicate Emails	Easy
183	Customers Who Never Order	Easy
184	Department Highest Salary	Medium
185	Department Top Three Salaries	Hard
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	Easy
190	Reverse Bits	Easy
191	Number of 1 Bits	Easy
192	Word Frequency	Medium
193	Valid Phone Numbers	Easy
194	Transpose File	Medium
195	Tenth Line	Easy
196	Delete Duplicate Emails	Easy
197	Rising Temperature	Easy
198	House Robber	Easy	Python
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	Python
204	Count Primes	Easy
205	Isomorphic Strings	Easy
206	Reverse Linked List	Easy	Python
207	Course Schedule	Medium
208	Implement Trie (Prefix Tree)	Medium
209	Minimum Size Subarray Sum	Medium
210	Course Schedule II	Medium
211	Add and Search Word - Data structure design	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	Medium
221	Maximal Square	Medium
222	Count Complete Tree Nodes	Medium
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	Medium
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	Python
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	Python
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🔒	Easy
257	Binary Tree Paths	Easy
258	Add Digits	Easy
259	3Sum Smaller🔒	Medium
260	Single Number III	Medium
261	Graph Valid Tree🔒	Medium
262	Trips and Users	Hard
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🔒	Easy
277	Find the Celebrity🔒	Medium
278	First Bad Version	Easy
279	Perfect Squares	Medium
280	Wiggle Sort🔒	Medium
281	Zigzag Iterator🔒	Medium
282	Expression Add Operators	Hard
283	Move Zeroes	Easy	C++, Python
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	Python
290	Word Pattern	Easy
291	Word Pattern II🔒	Hard
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	Easy
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🔒	Hard
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	Hard
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	Python
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	Python
329	Longest Increasing Path in a Matrix	Hard
330	Patching Array	Hard
331	Verify Preorder Serialization of a Binary Tree	Medium
332	Reconstruct Itinerary	Medium
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	Medium
339	Nested List Weight Sum🔒	Easy
340	Longest Substring with At Most K Distinct Characters🔒	Hard
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	Easy
372	Super Pow	Medium
373	Find K Pairs with Smallest Sums	Medium
374	Guess Number Higher or Lower	Easy
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	Medium
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	Easy
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	Python
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	Easy
430	Flatten a Multilevel Doubly Linked List	Medium	Python
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	Easy
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	Easy
444	Sequence Reconstruction🔒	Medium
445	Add Two Numbers II	Medium	Python
446	Arithmetic Slices II - Subsequence	Hard
447	Number of Boomerangs	Easy
448	Find All Numbers Disappeared in an Array	Easy	Python
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	Easy
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	Easy
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	Easy
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	Increasing Subsequences	Medium
492	Construct the Rectangle	Easy
493	Reverse Pairs	Hard
494	Target Sum	Medium
495	Teemo Attacking	Medium	Python
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	Python
510	Inorder Successor in BST II🔒	Medium
511	Game Play Analysis I🔒	Easy
512	Game Play Analysis II🔒	Easy
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 2	Medium	Python
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	Easy
533	Lonely Pixel II🔒	Medium
534	Game Play Analysis III🔒	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	Easy
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	Friend Circles	Medium
548	Split Array with Equal Sum🔒	Medium
549	Binary Tree Longest Consecutive Sequence II🔒	Medium
550	Game Play Analysis IV🔒	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	Quad Tree Intersection	Easy
559	Maximum Depth of N-ary Tree	Easy
560	Subarray Sum Equals K	Medium
561	Array Partition I	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
569	Median Employee Salary🔒	Hard
570	Managers with at Least 5 Direct Reports🔒	Medium
571	Find Median Given Frequency of Numbers🔒	Hard
572	Subtree of Another Tree	Easy
573	Squirrel Simulation🔒	Medium
574	Winning Candidate🔒	Medium
575	Distribute Candies	Easy
576	Out of Boundary Paths	Medium
577	Employee Bonus🔒	Easy
578	Get Highest Answer Rate Question🔒	Medium
579	Find Cumulative Salary of an Employee🔒	Hard
580	Count Student Number in Departments🔒	Medium
581	Shortest Unsorted Continuous Subarray	Easy
582	Kill Process🔒	Medium
583	Delete Operation for Two Strings	Medium
584	Find Customer Referee🔒	Easy
585	Investments in 2016🔒	Medium
586	Customer Placing the Largest Number of Orders🔒	Easy
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
595	Big Countries	Easy
596	Classes More Than 5 Students	Easy
597	Friend Requests I: Overall Acceptance Rate🔒	Easy
598	Range Addition II	Easy
599	Minimum Index Sum of Two Lists	Easy
600	Non-negative Integers without Consecutive Ones	Hard
601	Human Traffic of Stadium	Hard
602	Friend Requests II: Who Has the Most Friends🔒	Medium
603	Consecutive Available Seats🔒	Easy
604	Design Compressed String Iterator🔒	Easy
605	Can Place Flowers	Easy
606	Construct String from Binary Tree	Easy
607	Sales Person🔒	Easy
608	Tree Node🔒	Medium
609	Find Duplicate File in System	Medium
610	Triangle Judgement🔒	Easy
611	Valid Triangle Number	Medium
612	Shortest Distance in a Plane🔒	Medium
613	Shortest Distance in a Line🔒	Easy
614	Second Degree Follower🔒	Medium
615	Average Salary: Departments VS Company🔒	Hard
616	Add Bold Tag in String🔒	Medium
617	Merge Two Binary Trees	Easy
618	Students Report By Geography🔒	Hard
619	Biggest Single Number🔒	Easy
620	Not Boring Movies	Easy
621	Task Scheduler	Medium
622	Design Circular Queue	Medium
623	Add One Row to Tree	Medium
624	Maximum Distance in Arrays🔒	Easy
625	Minimum Factorization🔒	Medium
626	Exchange Seats	Medium
627	Swap Salary	Easy
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	Easy
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	Easy
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	Easy
666	Path Sum IV🔒	Medium
667	Beautiful Arrangement II	Medium
668	Kth Smallest Number in Multiplication Table	Hard
669	Trim a Binary Search Tree	Easy
670	Maximum Swap	Medium	Python
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	Easy
688	Knight Probability in Chessboard	Medium
689	Maximum Sum of 3 Non-Overlapping Subarrays	Hard
690	Employee Importance	Easy
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	Easy	Python
708	Insert into a Cyclic Sorted 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🔒	Easy
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	Easy
721	Accounts Merge	Medium
722	Remove Comments	Medium
723	Candy Crush🔒	Medium
724	Find Pivot Index	Easy
725	Split Linked List in Parts	Medium	Python
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	Python
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🔒	Easy
752	Open the Lock	Medium
753	Cracking the Safe	Hard
754	Reach a Number	Easy
755	Pour Water🔒	Medium
756	Pyramid Transition Matrix	Medium
757	Set Intersection Size At Least Two	Hard
758	Bold Words in String🔒	Easy
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	Easy
785	Is Graph Bipartite?	Medium
786	K-th Smallest Prime Fraction	Hard
787	Cheapest Flights Within K Stops	Medium
788	Rotated Digits	Easy
789	Escape The Ghosts	Medium
790	Domino and Tromino Tiling	Medium	Python
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	Medium	Python
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	Easy
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	Python
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	Python
826	Most Profit Assigning Work	Medium
827	Making A Large Island	Hard
828	Unique Letter 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	Easy
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	Easy
850	Rectangle Area II	Hard
851	Loud and Rich	Medium
852	Peak Index in a Mountain Array	Easy
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	Python
874	Walking Robot Simulation	Easy
875	Koko Eating Bananas	Medium
876	Middle of the Linked List	Easy	Python
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	Easy
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	Easy
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 Log Files	Easy
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	Easy
950	Reveal Cards In Increasing Order	Medium	Python
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	Medium
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	Easy
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	Easy	Python
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	Python
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	Python
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 Sequence	Medium
1028	Recover a Tree From Preorder Traversal	Hard
1029	Two City Scheduling	Easy
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	Easy
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	Easy
1043	Partition Array for Maximum Sum	Medium
1044	Longest Duplicate Substring	Hard
1045	Customers Who Bought All Products🔒	Medium
1046	Last Stone Weight	Easy
1047	Remove All Adjacent Duplicates In String	Easy
1048	Longest String Chain	Medium
1049	Last Stone Weight II	Medium
1050	Actors and Directors Who Cooperated At Least Three Times🔒	Easy
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
1068	Product Sales Analysis I🔒	Easy
1069	Product Sales Analysis II🔒	Easy
1070	Product Sales Analysis III🔒	Medium
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
1075	Project Employees I🔒	Easy
1076	Project Employees II🔒	Easy
1077	Project Employees III🔒	Medium
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
1082	Sales Analysis I🔒	Easy
1083	Sales Analysis II🔒	Easy
1084	Sales Analysis III🔒	Easy
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
1097	Game Play Analysis V🔒	Hard
1098	Unpopular Books🔒	Medium
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
1107	New Users Daily Count🔒	Medium
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
1112	Highest Grade For Each Student🔒	Medium
1113	Reported Posts🔒	Easy
1114	Print in Order	Easy
1115	Print FooBar Alternately	Medium
1116	Print Zero Even Odd	Medium
1117	Building H2O	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
1126	Active Businesses🔒	Medium
1127	User Purchase Platform🔒	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
1132	Reported Posts II🔒	Medium
1133	Largest Unique Number🔒	Easy
1134	Armstrong Number🔒	Easy
1135	Connecting Cities With Minimum Cost🔒	Medium
1136	Parallel Courses🔒	Hard
1137	N-th Tribonacci Number	Easy
1138	Alphabet Board Path	Medium
1139	Largest 1-Bordered Square	Medium
1140	Stone Game II	Medium
1141	User Activity for the Past 30 Days I🔒	Easy
1142	User Activity for the Past 30 Days II🔒	Easy
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
1148	Article Views I🔒	Easy
1149	Article Views II🔒	Medium
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
1158	Market Analysis I🔒	Medium
1159	Market Analysis II🔒	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
1164	Product Price at a Given Date🔒	Medium
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	Easy
1170	Compare Strings by Frequency of the Smallest Character	Easy
1171	Remove Zero Sum Consecutive Nodes from Linked List	Medium
1172	Dinner Plate Stacks	Hard
1173	Immediate Food Delivery I🔒	Easy
1174	Immediate Food Delivery II🔒	Medium
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
1179	Reformat Department Table	Easy
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
1188	Design Bounded Blocking Queue	Medium