LeetCode

My LeetCode Repo.

Update time: 2022-07-04(Mon) 15:03:09

Summary

🤩 简单	🤔 一般	🤯 困难
53/698	32/1426	6/570

Progress

序号	名称	难度	状态
1	Two Sum	🤩 简单	✅
2	Add Two Numbers	🤔 一般	✅
3	Longest Substring Without Repeating Characters	🤔 一般	✅
4	Median of Two Sorted Arrays	🤯 困难	✅
5	Longest Palindromic Substring	🤔 一般	✅
6	ZigZag Conversion	🤔 一般	🕐
7	Reverse Integer	🤔 一般	✅
8	String to Integer (atoi)	🤔 一般	🕐
9	Palindrome Number	🤩 简单	✅
10	Regular Expression Matching	🤯 困难	🕐
11	Container With Most Water	🤔 一般	🕐
12	Integer to Roman	🤔 一般	✅
13	Roman to Integer	🤩 简单	🕐
14	Longest Common Prefix	🤩 简单	🕐
15	3Sum	🤔 一般	🆖
16	3Sum Closest	🤔 一般	🕐
17	Letter Combinations of a Phone Number	🤔 一般	🕐
18	4Sum	🤔 一般	🕐
19	Remove Nth Node From End of List	🤔 一般	🕐
20	Valid Parentheses	🤩 简单	🕐
21	Merge Two Sorted Lists	🤩 简单	🕐
22	Generate Parentheses	🤔 一般	🆖
23	Merge k Sorted Lists	🤯 困难	🕐
24	Swap Nodes in Pairs	🤔 一般	🕐
25	Reverse Nodes in k-Group	🤯 困难	🕐
26	Remove Duplicates from Sorted Array	🤩 简单	🕐
27	Remove Element	🤩 简单	🕐
28	Implement strStr()	🤩 简单	🕐
29	Divide Two Integers	🤔 一般	🕐
30	Substring with Concatenation of All Words	🤯 困难	✅
31	Next Permutation	🤔 一般	🕐
32	Longest Valid Parentheses	🤯 困难	🕐
33	Search in Rotated Sorted Array	🤔 一般	🕐
34	Find First and Last Position of Element in Sorted Array	🤔 一般	🕐
35	Search Insert Position	🤩 简单	✅
36	Valid Sudoku	🤔 一般	🕐
37	Sudoku Solver	🤯 困难	🕐
38	Count and Say	🤔 一般	🕐
39	Combination Sum	🤔 一般	🕐
40	Combination Sum II	🤔 一般	🕐
41	First Missing Positive	🤯 困难	🕐
42	Trapping Rain Water	🤯 困难	🕐
43	Multiply Strings	🤔 一般	🕐
44	Wildcard Matching	🤯 困难	🕐
45	Jump Game II	🤔 一般	🕐
46	Permutations	🤔 一般	🕐
47	Permutations II	🤔 一般	🕐
48	Rotate Image	🤔 一般	🕐
49	Group Anagrams	🤔 一般	🕐
50	Pow(x, n)	🤔 一般	🕐
51	N-Queens	🤯 困难	🕐
52	N-Queens II	🤯 困难	🕐
53	Maximum Subarray	🤩 简单	✅
54	Spiral Matrix	🤔 一般	🕐
55	Jump Game	🤔 一般	🕐
56	Merge Intervals	🤔 一般	🆖
57	Insert Interval	🤔 一般	🕐
58	Length of Last Word	🤩 简单	🕐
59	Spiral Matrix II	🤔 一般	🕐
60	Permutation Sequence	🤯 困难	🕐
61	Rotate List	🤔 一般	🕐
62	Unique Paths	🤔 一般	🕐
63	Unique Paths II	🤔 一般	🕐
64	Minimum Path Sum	🤔 一般	🕐
65	Valid Number	🤯 困难	🕐
66	Plus One	🤩 简单	🕐
67	Add Binary	🤩 简单	🕐
68	Text Justification	🤯 困难	🕐
69	Sqrt(x)	🤩 简单	🕐
70	Climbing Stairs	🤩 简单	🕐
71	Simplify Path	🤔 一般	✅
72	Edit Distance	🤯 困难	🕐
73	Set Matrix Zeroes	🤔 一般	🕐
74	Search a 2D Matrix	🤔 一般	🕐
75	Sort Colors	🤔 一般	🕐
76	Minimum Window Substring	🤯 困难	🕐
77	Combinations	🤔 一般	🕐
78	Subsets	🤔 一般	🕐
79	Word Search	🤔 一般	🕐
80	Remove Duplicates from Sorted Array II	🤔 一般	🕐
81	Search in Rotated Sorted Array II	🤔 一般	🕐
82	Remove Duplicates from Sorted List II	🤔 一般	🕐
83	Remove Duplicates from Sorted List	🤩 简单	🕐
84	Largest Rectangle in Histogram	🤯 困难	🕐
85	Maximal Rectangle	🤯 困难	🕐
86	Partition List	🤔 一般	🕐
87	Scramble String	🤯 困难	🕐
88	Merge Sorted Array	🤩 简单	🕐
89	Gray Code	🤔 一般	✅
90	Subsets II	🤔 一般	🕐
91	Decode Ways	🤔 一般	🕐
92	Reverse Linked List II	🤔 一般	🕐
93	Restore IP Addresses	🤔 一般	🕐
94	Binary Tree Inorder Traversal	🤩 简单	🕐
95	Unique Binary Search Trees II	🤔 一般	🕐
96	Unique Binary Search Trees	🤔 一般	🕐
97	Interleaving String	🤔 一般	🕐
98	Validate Binary Search Tree	🤔 一般	🕐
99	Recover Binary Search Tree	🤔 一般	🕐
100	Same Tree	🤩 简单	🕐
101	Symmetric Tree	🤩 简单	🕐
102	Binary Tree Level Order Traversal	🤔 一般	🕐
103	Binary Tree Zigzag Level Order Traversal	🤔 一般	🕐
104	Maximum Depth of Binary Tree	🤩 简单	🕐
105	Construct Binary Tree from Preorder and Inorder Traversal	🤔 一般	🕐
106	Construct Binary Tree from Inorder and Postorder Traversal	🤔 一般	🕐
107	Binary Tree Level Order Traversal II	🤔 一般	🕐
108	Convert Sorted Array to Binary Search Tree	🤩 简单	🕐
109	Convert Sorted List to Binary Search Tree	🤔 一般	🕐
110	Balanced Binary Tree	🤩 简单	🕐
111	Minimum Depth of Binary Tree	🤩 简单	🕐
112	Path Sum	🤩 简单	🕐
113	Path Sum II	🤔 一般	🕐
114	Flatten Binary Tree to Linked List	🤔 一般	🕐
115	Distinct Subsequences	🤯 困难	🕐
116	Populating Next Right Pointers in Each Node	🤔 一般	🕐
117	Populating Next Right Pointers in Each Node II	🤔 一般	🕐
118	Pascal's Triangle	🤩 简单	🕐
119	Pascal's Triangle II	🤩 简单	✅
120	Triangle	🤔 一般	🕐
121	Best Time to Buy and Sell Stock	🤩 简单	🕐
122	Best Time to Buy and Sell Stock II	🤔 一般	🕐
123	Best Time to Buy and Sell Stock III	🤯 困难	🕐
124	Binary Tree Maximum Path Sum	🤯 困难	🕐
125	Valid Palindrome	🤩 简单	🕐
126	Word Ladder II	🤯 困难	🕐
127	Word Ladder	🤯 困难	🕐
128	Longest Consecutive Sequence	🤔 一般	🕐
129	Sum Root to Leaf Numbers	🤔 一般	🕐
130	Surrounded Regions	🤔 一般	🕐
131	Palindrome Partitioning	🤔 一般	🕐
132	Palindrome Partitioning II	🤯 困难	🕐
133	Clone Graph	🤔 一般	🕐
134	Gas Station	🤔 一般	🕐
135	Candy	🤯 困难	🕐
136	Single Number	🤩 简单	🕐
137	Single Number II	🤔 一般	🕐
138	Copy List with Random Pointer	🤔 一般	🕐
139	Word Break	🤔 一般	🕐
140	Word Break II	🤯 困难	🕐
141	Linked List Cycle	🤩 简单	🕐
142	Linked List Cycle II	🤔 一般	🕐
143	Reorder List	🤔 一般	🕐
144	Binary Tree Preorder Traversal	🤩 简单	🕐
145	Binary Tree Postorder Traversal	🤩 简单	🕐
146	LRU Cache	🤔 一般	🕐
147	Insertion Sort List	🤔 一般	🕐
148	Sort List	🤔 一般	🕐
149	Max Points on a Line	🤯 困难	🕐
150	Evaluate Reverse Polish Notation	🤔 一般	🕐
151	Reverse Words in a String	🤔 一般	🕐
152	Maximum Product Subarray	🤔 一般	🕐
153	Find Minimum in Rotated Sorted Array	🤔 一般	🕐
154	Find Minimum in Rotated Sorted Array II	🤯 困难	🕐
155	Min Stack	🤩 简单	🕐
156	Binary Tree Upside Down	🤔 一般	🕐
157	Read N Characters Given Read4	🤩 简单	🕐
158	Read N Characters Given Read4 II - Call multiple times	🤯 困难	🕐
159	Longest Substring with At Most Two Distinct Characters	🤔 一般	🕐
160	Intersection of Two Linked Lists	🤩 简单	🕐
161	One Edit Distance	🤔 一般	🕐
162	Find Peak Element	🤔 一般	✅
163	Missing Ranges	🤩 简单	🕐
164	Maximum Gap	🤯 困难	🕐
165	Compare Version Numbers	🤔 一般	✅
166	Fraction to Recurring Decimal	🤔 一般	🕐
167	Two Sum II - Input Array Is Sorted	🤩 简单	🕐
168	Excel Sheet Column Title	🤩 简单	🕐
169	Majority Element	🤩 简单	✅
170	Two Sum III - Data structure design	🤩 简单	🕐
171	Excel Sheet Column Number	🤩 简单	🕐
172	Factorial Trailing Zeroes	🤔 一般	🕐
173	Binary Search Tree Iterator	🤔 一般	🕐
174	Dungeon Game	🤯 困难	🕐
179	Largest Number	🤔 一般	🕐
186	Reverse Words in a String II	🤔 一般	🕐
187	Repeated DNA Sequences	🤔 一般	🕐
188	Best Time to Buy and Sell Stock IV	🤯 困难	🕐
189	Rotate Array	🤔 一般	🕐
190	Reverse Bits	🤩 简单	🕐
191	Number of 1 Bits	🤩 简单	✅
198	House Robber	🤔 一般	🕐
199	Binary Tree Right Side View	🤔 一般	🕐
200	Number of Islands	🤔 一般	🕐
201	Bitwise AND of Numbers Range	🤔 一般	🕐
202	Happy Number	🤩 简单	🕐
203	Remove Linked List Elements	🤩 简单	🕐
204	Count Primes	🤔 一般	🕐
205	Isomorphic Strings	🤩 简单	🕐
206	Reverse Linked List	🤩 简单	🕐
207	Course Schedule	🤔 一般	✅
208	Implement Trie (Prefix Tree)	🤔 一般	🕐
209	Minimum Size Subarray Sum	🤔 一般	🕐
210	Course Schedule II	🤔 一般	🕐
211	Design Add and Search Words Data Structure	🤔 一般	🕐
212	Word Search II	🤯 困难	🕐
213	House Robber II	🤔 一般	🕐
214	Shortest Palindrome	🤯 困难	🕐
215	Kth Largest Element in an Array	🤔 一般	✅
216	Combination Sum III	🤔 一般	🕐
217	Contains Duplicate	🤩 简单	🕐
218	The Skyline Problem	🤯 困难	🕐
219	Contains Duplicate II	🤩 简单	🕐
220	Contains Duplicate III	🤔 一般	🕐
221	Maximal Square	🤔 一般	🕐
222	Count Complete Tree Nodes	🤔 一般	🕐
223	Rectangle Area	🤔 一般	🕐
224	Basic Calculator	🤯 困难	🕐
225	Implement Stack using Queues	🤩 简单	🕐
226	Invert Binary Tree	🤩 简单	🕐
227	Basic Calculator II	🤔 一般	🕐
228	Summary Ranges	🤩 简单	🕐
229	Majority Element II	🤔 一般	🕐
230	Kth Smallest Element in a BST	🤔 一般	🕐
231	Power of Two	🤩 简单	✅
232	Implement Queue using Stacks	🤩 简单	🕐
233	Number of Digit One	🤯 困难	✅
234	Palindrome Linked List	🤩 简单	🕐
235	Lowest Common Ancestor of a Binary Search Tree	🤩 简单	✅
236	Lowest Common Ancestor of a Binary Tree	🤔 一般	🕐
237	Delete Node in a Linked List	🤩 简单	🕐
238	Product of Array Except Self	🤔 一般	🕐
239	Sliding Window Maximum	🤯 困难	🕐
240	Search a 2D Matrix II	🤔 一般	🕐
241	Different Ways to Add Parentheses	🤔 一般	🕐
242	Valid Anagram	🤩 简单	🕐
243	Shortest Word Distance	🤩 简单	🕐
244	Shortest Word Distance II	🤔 一般	🕐
245	Shortest Word Distance III	🤔 一般	🕐
246	Strobogrammatic Number	🤩 简单	🕐
247	Strobogrammatic Number II	🤔 一般	🕐
248	Strobogrammatic Number III	🤯 困难	🕐
249	Group Shifted Strings	🤔 一般	🕐
250	Count Univalue Subtrees	🤔 一般	🕐
251	Flatten 2D Vector	🤔 一般	🕐
252	Meeting Rooms	🤩 简单	🕐
253	Meeting Rooms II	🤔 一般	🕐
254	Factor Combinations	🤔 一般	🕐
255	Verify Preorder Sequence in Binary Search Tree	🤔 一般	🕐
256	Paint House	🤔 一般	🕐
257	Binary Tree Paths	🤩 简单	🕐
258	Add Digits	🤩 简单	🕐
259	3Sum Smaller	🤔 一般	🕐
260	Single Number III	🤔 一般	🕐
261	Graph Valid Tree	🤔 一般	🕐
263	Ugly Number	🤩 简单	🕐
264	Ugly Number II	🤔 一般	🕐
265	Paint House II	🤯 困难	🕐
266	Palindrome Permutation	🤩 简单	🕐
267	Palindrome Permutation II	🤔 一般	🕐
268	Missing Number	🤩 简单	🕐
269	Alien Dictionary	🤯 困难	🕐
270	Closest Binary Search Tree Value	🤩 简单	🕐
271	Encode and Decode Strings	🤔 一般	🕐
272	Closest Binary Search Tree Value II	🤯 困难	🕐
273	Integer to English Words	🤯 困难	🕐
274	H-Index	🤔 一般	🕐
275	H-Index II	🤔 一般	🕐
276	Paint Fence	🤔 一般	🕐
277	Find the Celebrity	🤔 一般	🕐
278	First Bad Version	🤩 简单	🕐
279	Perfect Squares	🤔 一般	🕐
280	Wiggle Sort	🤔 一般	🕐
281	Zigzag Iterator	🤔 一般	🕐
282	Expression Add Operators	🤯 困难	🕐
283	Move Zeroes	🤩 简单	🕐
284	Peeking Iterator	🤔 一般	🕐
285	Inorder Successor in BST	🤔 一般	🕐
286	Walls and Gates	🤔 一般	🕐
287	Find the Duplicate Number	🤔 一般	🕐
288	Unique Word Abbreviation	🤔 一般	🕐
289	Game of Life	🤔 一般	🕐
290	Word Pattern	🤩 简单	🕐
291	Word Pattern II	🤔 一般	🕐
292	Nim Game	🤩 简单	✅
293	Flip Game	🤩 简单	🕐
294	Flip Game II	🤔 一般	🕐
295	Find Median from Data Stream	🤯 困难	🕐
296	Best Meeting Point	🤯 困难	🕐
297	Serialize and Deserialize Binary Tree	🤯 困难	🕐
298	Binary Tree Longest Consecutive Sequence	🤔 一般	🕐
299	Bulls and Cows	🤔 一般	🕐
300	Longest Increasing Subsequence	🤔 一般	🕐
301	Remove Invalid Parentheses	🤯 困难	🕐
302	Smallest Rectangle Enclosing Black Pixels	🤯 困难	🕐
303	Range Sum Query - Immutable	🤩 简单	🕐
304	Range Sum Query 2D - Immutable	🤔 一般	🕐
305	Number of Islands II	🤯 困难	🕐
306	Additive Number	🤔 一般	🆖
307	Range Sum Query - Mutable	🤔 一般	🕐
308	Range Sum Query 2D - Mutable	🤯 困难	🕐
309	Best Time to Buy and Sell Stock with Cooldown	🤔 一般	✅
310	Minimum Height Trees	🤔 一般	🕐
311	Sparse Matrix Multiplication	🤔 一般	🕐
312	Burst Balloons	🤯 困难	🕐
313	Super Ugly Number	🤔 一般	🕐
314	Binary Tree Vertical Order Traversal	🤔 一般	🕐
315	Count of Smaller Numbers After Self	🤯 困难	🕐
316	Remove Duplicate Letters	🤔 一般	🕐
317	Shortest Distance from All Buildings	🤯 困难	🕐
318	Maximum Product of Word Lengths	🤔 一般	🆖
319	Bulb Switcher	🤔 一般	🕐
320	Generalized Abbreviation	🤔 一般	🕐
321	Create Maximum Number	🤯 困难	🕐
322	Coin Change	🤔 一般	✅
323	Number of Connected Components in an Undirected Graph	🤔 一般	🆖
324	Wiggle Sort II	🤔 一般	🕐
325	Maximum Size Subarray Sum Equals k	🤔 一般	🕐
326	Power of Three	🤩 简单	✅
327	Count of Range Sum	🤯 困难	🕐
328	Odd Even Linked List	🤔 一般	🕐
329	Longest Increasing Path in a Matrix	🤯 困难	🕐
330	Patching Array	🤯 困难	🕐
331	Verify Preorder Serialization of a Binary Tree	🤔 一般	🕐
332	Reconstruct Itinerary	🤯 困难	🕐
333	Largest BST Subtree	🤔 一般	🕐
334	Increasing Triplet Subsequence	🤔 一般	✅
335	Self Crossing	🤯 困难	🆖
336	Palindrome Pairs	🤯 困难	🕐
337	House Robber III	🤔 一般	🕐
338	Counting Bits	🤩 简单	🕐
339	Nested List Weight Sum	🤔 一般	✅
340	Longest Substring with At Most K Distinct Characters	🤔 一般	🕐
341	Flatten Nested List Iterator	🤔 一般	✅
342	Power of Four	🤩 简单	🕐
343	Integer Break	🤔 一般	✅
344	Reverse String	🤩 简单	🕐
345	Reverse Vowels of a String	🤩 简单	🕐
346	Moving Average from Data Stream	🤩 简单	🕐
347	Top K Frequent Elements	🤔 一般	🕐
348	Design Tic-Tac-Toe	🤔 一般	🕐
349	Intersection of Two Arrays	🤩 简单	🕐
350	Intersection of Two Arrays II	🤩 简单	🕐
351	Android Unlock Patterns	🤔 一般	✅
352	Data Stream as Disjoint Intervals	🤯 困难	🕐
353	Design Snake Game	🤔 一般	🕐
354	Russian Doll Envelopes	🤯 困难	🕐
355	Design Twitter	🤔 一般	🕐
356	Line Reflection	🤔 一般	🕐
357	Count Numbers with Unique Digits	🤔 一般	🕐
358	Rearrange String k Distance Apart	🤯 困难	🕐
359	Logger Rate Limiter	🤩 简单	🕐
360	Sort Transformed Array	🤔 一般	🕐
361	Bomb Enemy	🤔 一般	🕐
362	Design Hit Counter	🤔 一般	🕐
363	Max Sum of Rectangle No Larger Than K	🤯 困难	🕐
364	Nested List Weight Sum II	🤔 一般	🕐
365	Water and Jug Problem	🤔 一般	🕐
366	Find Leaves of Binary Tree	🤔 一般	🕐
367	Valid Perfect Square	🤩 简单	🕐
368	Largest Divisible Subset	🤔 一般	🕐
369	Plus One Linked List	🤔 一般	🕐
370	Range Addition	🤔 一般	🕐
371	Sum of Two Integers	🤔 一般	🕐
372	Super Pow	🤔 一般	🕐
373	Find K Pairs with Smallest Sums	🤔 一般	🆖
374	Guess Number Higher or Lower	🤩 简单	🕐
375	Guess Number Higher or Lower II	🤔 一般	🕐
376	Wiggle Subsequence	🤔 一般	🕐
377	Combination Sum IV	🤔 一般	🕐
378	Kth Smallest Element in a Sorted Matrix	🤔 一般	🕐
379	Design Phone Directory	🤔 一般	🕐
380	Insert Delete GetRandom O(1)	🤔 一般	🕐
381	Insert Delete GetRandom O(1) - Duplicates allowed	🤯 困难	🕐
382	Linked List Random Node	🤔 一般	🕐
383	Ransom Note	🤩 简单	🕐
384	Shuffle an Array	🤔 一般	✅
385	Mini Parser	🤔 一般	🕐
386	Lexicographical Numbers	🤔 一般	🕐
387	First Unique Character in a String	🤩 简单	🕐
388	Longest Absolute File Path	🤔 一般	✅
389	Find the Difference	🤩 简单	🕐
390	Elimination Game	🤔 一般	🆖
391	Perfect Rectangle	🤯 困难	🕐
392	Is Subsequence	🤩 简单	🕐
393	UTF-8 Validation	🤔 一般	🕐
394	Decode String	🤔 一般	🕐
395	Longest Substring with At Least K Repeating Characters	🤔 一般	🕐
396	Rotate Function	🤔 一般	🕐
397	Integer Replacement	🤔 一般	🕐
398	Random Pick Index	🤔 一般	🕐
399	Evaluate Division	🤔 一般	🕐
400	Nth Digit	🤔 一般	🕐
401	Binary Watch	🤩 简单	🕐
402	Remove K Digits	🤔 一般	🕐
403	Frog Jump	🤯 困难	🕐
404	Sum of Left Leaves	🤩 简单	🕐
405	Convert a Number to Hexadecimal	🤩 简单	🕐
406	Queue Reconstruction by Height	🤔 一般	🕐
407	Trapping Rain Water II	🤯 困难	🕐
408	Valid Word Abbreviation	🤩 简单	🕐
409	Longest Palindrome	🤩 简单	🕐
410	Split Array Largest Sum	🤯 困难	🕐
411	Minimum Unique Word Abbreviation	🤯 困难	🕐
412	Fizz Buzz	🤩 简单	🕐
413	Arithmetic Slices	🤔 一般	🕐
414	Third Maximum Number	🤩 简单	🕐
415	Add Strings	🤩 简单	🕐
416	Partition Equal Subset Sum	🤔 一般	🕐
417	Pacific Atlantic Water Flow	🤔 一般	🕐
418	Sentence Screen Fitting	🤔 一般	🕐
419	Battleships in a Board	🤔 一般	🕐
420	Strong Password Checker	🤯 困难	🕐
421	Maximum XOR of Two Numbers in an Array	🤔 一般	🕐
422	Valid Word Square	🤩 简单	🕐
423	Reconstruct Original Digits from English	🤔 一般	🕐
424	Longest Repeating Character Replacement	🤔 一般	🕐
425	Word Squares	🤯 困难	🕐
432	All O`one Data Structure	🤯 困难	🕐
433	Minimum Genetic Mutation	🤔 一般	🕐
434	Number of Segments in a String	🤩 简单	🕐
435	Non-overlapping Intervals	🤔 一般	🕐
436	Find Right Interval	🤔 一般	🕐
437	Path Sum III	🤔 一般	🕐
438	Find All Anagrams in a String	🤔 一般	🕐
439	Ternary Expression Parser	🤔 一般	🕐
440	K-th Smallest in Lexicographical Order	🤯 困难	🕐
441	Arranging Coins	🤩 简单	🕐
442	Find All Duplicates in an Array	🤔 一般	🕐
443	String Compression	🤔 一般	🕐
444	Sequence Reconstruction	🤔 一般	🕐
445	Add Two Numbers II	🤔 一般	🕐
446	Arithmetic Slices II - Subsequence	🤯 困难	🕐
447	Number of Boomerangs	🤔 一般	✅
448	Find All Numbers Disappeared in an Array	🤩 简单	🕐
449	Serialize and Deserialize BST	🤔 一般	🕐
450	Delete Node in a BST	🤔 一般	🕐
451	Sort Characters By Frequency	🤔 一般	🕐
452	Minimum Number of Arrows to Burst Balloons	🤔 一般	🕐
453	Minimum Moves to Equal Array Elements	🤩 简单	🕐
454	4Sum II	🤔 一般	🕐
455	Assign Cookies	🤩 简单	🕐
456	132 Pattern	🤔 一般	🆖
457	Circular Array Loop	🤔 一般	🕐
458	Poor Pigs	🤯 困难	🕐
459	Repeated Substring Pattern	🤩 简单	🕐
460	LFU Cache	🤯 困难	🕐
461	Hamming Distance	🤩 简单	🕐
462	Minimum Moves to Equal Array Elements II	🤔 一般	🕐
463	Island Perimeter	🤩 简单	🕐
464	Can I Win	🤔 一般	✅
465	Optimal Account Balancing	🤯 困难	🕐
466	Count The Repetitions	🤯 困难	🕐
467	Unique Substrings in Wraparound String	🤔 一般	🕐
468	Validate IP Address	🤔 一般	🕐
469	Convex Polygon	🤔 一般	🕐
471	Encode String with Shortest Length	🤯 困难	🕐
472	Concatenated Words	🤯 困难	🕐
473	Matchsticks to Square	🤔 一般	🕐
474	Ones and Zeroes	🤔 一般	🆖
475	Heaters	🤔 一般	🕐
476	Number Complement	🤩 简单	🕐
477	Total Hamming Distance	🤔 一般	🕐
479	Largest Palindrome Product	🤯 困难	🕐
480	Sliding Window Median	🤯 困难	✅
481	Magical String	🤔 一般	🕐
482	License Key Formatting	🤩 简单	🕐
483	Smallest Good Base	🤯 困难	🕐
484	Find Permutation	🤔 一般	🕐
485	Max Consecutive Ones	🤩 简单	🕐
486	Predict the Winner	🤔 一般	🕐
487	Max Consecutive Ones II	🤔 一般	🕐
488	Zuma Game	🤯 困难	🕐
1643	Kth Smallest Instructions	🤯 困难	🕐
490	The Maze	🤔 一般	🕐
491	Increasing Subsequences	🤔 一般	🕐
492	Construct the Rectangle	🤩 简单	🕐
493	Reverse Pairs	🤯 困难	🕐
494	Target Sum	🤔 一般	🕐
495	Teemo Attacking	🤩 简单	🕐
496	Next Greater Element I	🤩 简单	🕐
498	Diagonal Traverse	🤔 一般	🕐
499	The Maze III	🤯 困难	🕐
500	Keyboard Row	🤩 简单	🕐
501	Find Mode in Binary Search Tree	🤩 简单	🕐
502	IPO	🤯 困难	🆖
503	Next Greater Element II	🤔 一般	✅
504	Base 7	🤩 简单	🕐
505	The Maze II	🤔 一般	🕐
506	Relative Ranks	🤩 简单	🕐
507	Perfect Number	🤩 简单	🕐
508	Most Frequent Subtree Sum	🤔 一般	🕐
510	Inorder Successor in BST II	🤔 一般	🕐
2031	Count Subarrays With More Ones Than Zeros	🤔 一般	🕐
1059	All Paths from Source Lead to Destination	🤔 一般	🕐
2036	Maximum Alternating Subarray Sum	🤔 一般	🕐
513	Find Bottom Left Tree Value	🤔 一般	🕐
514	Freedom Trail	🤯 困难	🕐
515	Find Largest Value in Each Tree Row	🤔 一般	🕐
516	Longest Palindromic Subsequence	🤔 一般	🕐
517	Super Washing Machines	🤯 困难	🕐
518	Coin Change 2	🤔 一般	🕐
1983	Widest Pair of Indices With Equal Range Sum	🤔 一般	🆖
520	Detect Capital	🤩 简单	🕐
521	Longest Uncommon Subsequence I	🤩 简单	🕐
522	Longest Uncommon Subsequence II	🤔 一般	🕐
523	Continuous Subarray Sum	🤔 一般	🕐
524	Longest Word in Dictionary through Deleting	🤔 一般	✅
525	Contiguous Array	🤔 一般	🕐
526	Beautiful Arrangement	🤔 一般	🕐
527	Word Abbreviation	🤯 困难	🕐
1721	Swapping Nodes in a Linked List	🤔 一般	🕐
529	Minesweeper	🤔 一般	🕐
530	Minimum Absolute Difference in BST	🤩 简单	🕐
531	Lonely Pixel I	🤔 一般	🕐
532	K-diff Pairs in an Array	🤔 一般	🕐
533	Lonely Pixel II	🤔 一般	🕐
535	Encode and Decode TinyURL	🤔 一般	🕐
536	Construct Binary Tree from String	🤔 一般	🕐
537	Complex Number Multiplication	🤔 一般	🕐
538	Convert BST to Greater Tree	🤔 一般	🕐
539	Minimum Time Difference	🤔 一般	🕐
540	Single Element in a Sorted Array	🤔 一般	🕐
541	Reverse String II	🤩 简单	🕐
542	01 Matrix	🤔 一般	✅
543	Diameter of Binary Tree	🤩 简单	🕐
544	Output Contest Matches	🤔 一般	🕐
545	Boundary of Binary Tree	🤔 一般	🕐
546	Remove Boxes	🤯 困难	🕐
547	Number of Provinces	🤔 一般	🕐
548	Split Array with Equal Sum	🤯 困难	🕐
549	Binary Tree Longest Consecutive Sequence II	🤔 一般	🕐
1730	Shortest Path to Get Food	🤔 一般	🕐
551	Student Attendance Record I	🤩 简单	✅
552	Student Attendance Record II	🤯 困难	✅
553	Optimal Division	🤔 一般	🕐
554	Brick Wall	🤔 一般	🕐
555	Split Concatenated Strings	🤔 一般	🕐
556	Next Greater Element III	🤔 一般	✅
557	Reverse Words in a String III	🤩 简单	✅
560	Subarray Sum Equals K	🤔 一般	🕐
561	Array Partition I	🤩 简单	🕐
562	Longest Line of Consecutive One in Matrix	🤔 一般	🕐
563	Binary Tree Tilt	🤩 简单	🕐
564	Find the Closest Palindrome	🤯 困难	🕐
565	Array Nesting	🤔 一般	🕐
566	Reshape the Matrix	🤩 简单	🕐
567	Permutation in String	🤔 一般	🕐
568	Maximum Vacation Days	🤯 困难	🕐
572	Subtree of Another Tree	🤩 简单	🕐
573	Squirrel Simulation	🤔 一般	✅
575	Distribute Candies	🤩 简单	🕐
576	Out of Boundary Paths	🤔 一般	🕐
581	Shortest Unsorted Continuous Subarray	🤔 一般	🕐
582	Kill Process	🤔 一般	🕐
583	Delete Operation for Two Strings	🤔 一般	🕐
587	Erect the Fence	🤯 困难	🕐
588	Design In-Memory File System	🤯 困难	🕐
591	Tag Validator	🤯 困难	🕐
592	Fraction Addition and Subtraction	🤔 一般	🕐
593	Valid Square	🤔 一般	🕐
594	Longest Harmonious Subsequence	🤩 简单	🕐
598	Range Addition II	🤩 简单	🕐
599	Minimum Index Sum of Two Lists	🤩 简单	🕐
600	Non-negative Integers without Consecutive Ones	🤯 困难	🕐
604	Design Compressed String Iterator	🤩 简单	🕐
605	Can Place Flowers	🤩 简单	🕐
606	Construct String from Binary Tree	🤩 简单	🕐
609	Find Duplicate File in System	🤔 一般	🕐
611	Valid Triangle Number	🤔 一般	🕐
616	Add Bold Tag in String	🤔 一般	🕐
617	Merge Two Binary Trees	🤩 简单	🕐
621	Task Scheduler	🤔 一般	🕐
623	Add One Row to Tree	🤔 一般	🕐
624	Maximum Distance in Arrays	🤔 一般	🕐
625	Minimum Factorization	🤔 一般	🕐
628	Maximum Product of Three Numbers	🤩 简单	🕐
629	K Inverse Pairs Array	🤯 困难	🕐
630	Course Schedule III	🤯 困难	🕐
631	Design Excel Sum Formula	🤯 困难	🕐
632	Smallest Range Covering Elements from K Lists	🤯 困难	🕐
633	Sum of Square Numbers	🤔 一般	🕐
634	Find the Derangement of An Array	🤔 一般	🕐
635	Design Log Storage System	🤔 一般	🕐
636	Exclusive Time of Functions	🤔 一般	🕐
637	Average of Levels in Binary Tree	🤩 简单	🕐
638	Shopping Offers	🤔 一般	🕐
639	Decode Ways II	🤯 困难	🕐
640	Solve the Equation	🤔 一般	🕐
642	Design Search Autocomplete System	🤯 困难	🕐
643	Maximum Average Subarray I	🤩 简单	🕐
644	Maximum Average Subarray II	🤯 困难	🕐
645	Set Mismatch	🤩 简单	🕐
646	Maximum Length of Pair Chain	🤔 一般	🕐
647	Palindromic Substrings	🤔 一般	🕐
648	Replace Words	🤔 一般	🕐
649	Dota2 Senate	🤔 一般	🕐
650	2 Keys Keyboard	🤔 一般	🕐
651	4 Keys Keyboard	🤔 一般	🕐
652	Find Duplicate Subtrees	🤔 一般	🕐
653	Two Sum IV - Input is a BST	🤩 简单	🕐
654	Maximum Binary Tree	🤔 一般	🕐
655	Print Binary Tree	🤔 一般	🕐
656	Coin Path	🤯 困难	🕐
657	Robot Return to Origin	🤩 简单	🕐
658	Find K Closest Elements	🤔 一般	🕐
659	Split Array into Consecutive Subsequences	🤔 一般	🕐
660	Remove 9	🤯 困难	🕐
661	Image Smoother	🤩 简单	🕐
662	Maximum Width of Binary Tree	🤔 一般	🕐
663	Equal Tree Partition	🤔 一般	🕐
664	Strange Printer	🤯 困难	🕐
665	Non-decreasing Array	🤔 一般	🕐
666	Path Sum IV	🤔 一般	🕐
667	Beautiful Arrangement II	🤔 一般	🕐
668	Kth Smallest Number in Multiplication Table	🤯 困难	🕐
669	Trim a Binary Search Tree	🤔 一般	🕐
670	Maximum Swap	🤔 一般	🕐
671	Second Minimum Node In a Binary Tree	🤩 简单	🕐
672	Bulb Switcher II	🤔 一般	🕐
673	Number of Longest Increasing Subsequence	🤔 一般	🕐
674	Longest Continuous Increasing Subsequence	🤩 简单	🕐
675	Cut Off Trees for Golf Event	🤯 困难	🕐
676	Implement Magic Dictionary	🤔 一般	🕐
677	Map Sum Pairs	🤔 一般	🕐
678	Valid Parenthesis String	🤔 一般	🕐
679	24 Game	🤯 困难	🕐
680	Valid Palindrome II	🤩 简单	🕐
681	Next Closest Time	🤔 一般	🕐
682	Baseball Game	🤩 简单	🕐
683	K Empty Slots	🤯 困难	🕐
684	Redundant Connection	🤔 一般	🕐
685	Redundant Connection II	🤯 困难	🕐
686	Repeated String Match	🤔 一般	🕐
687	Longest Univalue Path	🤔 一般	🕐
688	Knight Probability in Chessboard	🤔 一般	🕐
689	Maximum Sum of 3 Non-Overlapping Subarrays	🤯 困难	🕐
690	Employee Importance	🤔 一般	🕐
691	Stickers to Spell Word	🤯 困难	🕐
692	Top K Frequent Words	🤔 一般	✅
693	Binary Number with Alternating Bits	🤩 简单	🕐
694	Number of Distinct Islands	🤔 一般	🕐
695	Max Area of Island	🤔 一般	🕐
696	Count Binary Substrings	🤩 简单	🕐
697	Degree of an Array	🤩 简单	🕐
698	Partition to K Equal Sum Subsets	🤔 一般	🕐
699	Falling Squares	🤯 困难	🕐
711	Number of Distinct Islands II	🤯 困难	🕐
712	Minimum ASCII Delete Sum for Two Strings	🤔 一般	🕐
713	Subarray Product Less Than K	🤔 一般	🕐
714	Best Time to Buy and Sell Stock with Transaction Fee	🤔 一般	🕐
715	Range Module	🤯 困难	🕐
716	Max Stack	🤩 简单	🕐
717	1-bit and 2-bit Characters	🤩 简单	🕐
718	Maximum Length of Repeated Subarray	🤔 一般	🕐
719	Find K-th Smallest Pair Distance	🤯 困难	🕐
720	Longest Word in Dictionary	🤩 简单	🕐
721	Accounts Merge	🤔 一般	🕐
722	Remove Comments	🤔 一般	🕐
723	Candy Crush	🤔 一般	🕐
724	Find Pivot Index	🤩 简单	✅
725	Split Linked List in Parts	🤔 一般	✅
726	Number of Atoms	🤯 困难	🕐
727	Minimum Window Subsequence	🤯 困难	🕐
728	Self Dividing Numbers	🤩 简单	🕐
729	My Calendar I	🤔 一般	🕐
730	Count Different Palindromic Subsequences	🤯 困难	🕐
731	My Calendar II	🤔 一般	🕐
732	My Calendar III	🤯 困难	🕐
733	Flood Fill	🤩 简单	🕐
734	Sentence Similarity	🤩 简单	🕐
735	Asteroid Collision	🤔 一般	🕐
736	Parse Lisp Expression	🤯 困难	🕐
737	Sentence Similarity II	🤔 一般	🕐
738	Monotone Increasing Digits	🤔 一般	🕐
739	Daily Temperatures	🤔 一般	🕐
740	Delete and Earn	🤔 一般	🕐
741	Cherry Pickup	🤯 困难	🕐
709	To Lower Case	🤩 简单	🕐
742	Closest Leaf in a Binary Tree	🤔 一般	🕐
743	Network Delay Time	🤔 一般	🕐
744	Find Smallest Letter Greater Than Target	🤩 简单	✅
745	Prefix and Suffix Search	🤯 困难	🕐
746	Min Cost Climbing Stairs	🤩 简单	🕐
747	Largest Number At Least Twice of Others	🤩 简单	✅
748	Shortest Completing Word	🤩 简单	✅
749	Contain Virus	🤯 困难	🕐
750	Number Of Corner Rectangles	🤔 一般	🕐
751	IP to CIDR	🤔 一般	🕐
752	Open the Lock	🤔 一般	🕐
753	Cracking the Safe	🤯 困难	✅
754	Reach a Number	🤔 一般	🕐
755	Pour Water	🤔 一般	🕐
756	Pyramid Transition Matrix	🤔 一般	🕐
426	Convert Binary Search Tree to Sorted Doubly Linked List	🤔 一般	🕐
757	Set Intersection Size At Least Two	🤯 困难	🕐
758	Bold Words in String	🤔 一般	🕐
759	Employee Free Time	🤯 困难	🕐
760	Find Anagram Mappings	🤩 简单	🕐
761	Special Binary String	🤯 困难	🕐
429	N-ary Tree Level Order Traversal	🤔 一般	🕐
428	Serialize and Deserialize N-ary Tree	🤯 困难	🕐
430	Flatten a Multilevel Doubly Linked List	🤔 一般	🕐
762	Prime Number of Set Bits in Binary Representation	🤩 简单	🕐
763	Partition Labels	🤔 一般	🕐
764	Largest Plus Sign	🤔 一般	🕐
765	Couples Holding Hands	🤯 困难	✅
431	Encode N-ary Tree to Binary Tree	🤯 困难	✅
427	Construct Quad Tree	🤔 一般	🕐
558	Logical OR of Two Binary Grids Represented as Quad-Trees	🤔 一般	🕐
559	Maximum Depth of N-ary Tree	🤩 简单	🕐
589	N-ary Tree Preorder Traversal	🤩 简单	🕐
590	N-ary Tree Postorder Traversal	🤩 简单	🕐
766	Toeplitz Matrix	🤩 简单	🕐
767	Reorganize String	🤔 一般	🕐
768	Max Chunks To Make Sorted II	🤯 困难	🕐
769	Max Chunks To Make Sorted	🤔 一般	🕐
770	Basic Calculator IV	🤯 困难	🕐
771	Jewels and Stones	🤩 简单	🕐
700	Search in a Binary Search Tree	🤩 简单	🕐
701	Insert into a Binary Search Tree	🤔 一般	🕐
772	Basic Calculator III	🤯 困难	🕐
702	Search in a Sorted Array of Unknown Size	🤔 一般	🕐
773	Sliding Puzzle	🤯 困难	🕐
774	Minimize Max Distance to Gas Station	🤯 困难	🕐
703	Kth Largest Element in a Stream	🤩 简单	🕐
775	Global and Local Inversions	🤔 一般	🕐
776	Split BST	🤔 一般	🕐
704	Binary Search	🤩 简单	✅
777	Swap Adjacent in LR String	🤔 一般	🕐
778	Swim in Rising Water	🤯 困难	✅
779	K-th Symbol in Grammar	🤔 一般	🕐
780	Reaching Points	🤯 困难	🕐
781	Rabbits in Forest	🤔 一般	🕐
782	Transform to Chessboard	🤯 困难	🕐
783	Minimum Distance Between BST Nodes	🤩 简单	🕐
784	Letter Case Permutation	🤔 一般	🕐
785	Is Graph Bipartite?	🤔 一般	🕐
786	K-th Smallest Prime Fraction	🤯 困难	🕐
787	Cheapest Flights Within K Stops	🤔 一般	🕐
788	Rotated Digits	🤔 一般	🕐
789	Escape The Ghosts	🤔 一般	🕐
790	Domino and Tromino Tiling	🤔 一般	🕐
791	Custom Sort String	🤔 一般	🕐
792	Number of Matching Subsequences	🤔 一般	🕐
793	Preimage Size of Factorial Zeroes Function	🤯 困难	🕐
794	Valid Tic-Tac-Toe State	🤔 一般	🕐
795	Number of Subarrays with Bounded Maximum	🤔 一般	🕐
796	Rotate String	🤩 简单	🕐
797	All Paths From Source to Target	🤔 一般	🕐
798	Smallest Rotation with Highest Score	🤯 困难	🕐
799	Champagne Tower	🤔 一般	🕐
705	Design HashSet	🤩 简单	🕐
706	Design HashMap	🤩 简单	🕐
800	Similar RGB Color	🤩 简单	🕐
801	Minimum Swaps To Make Sequences Increasing	🤯 困难	🕐
802	Find Eventual Safe States	🤔 一般	🕐
803	Bricks Falling When Hit	🤯 困难	🕐
804	Unique Morse Code Words	🤩 简单	🕐
805	Split Array With Same Average	🤯 困难	🕐
806	Number of Lines To Write String	🤩 简单	🕐
807	Max Increase to Keep City Skyline	🤔 一般	🕐
808	Soup Servings	🤔 一般	🕐
809	Expressive Words	🤔 一般	🕐
810	Chalkboard XOR Game	🤯 困难	🕐
811	Subdomain Visit Count	🤔 一般	🕐
812	Largest Triangle Area	🤩 简单	🕐
813	Largest Sum of Averages	🤔 一般	🕐
814	Binary Tree Pruning	🤔 一般	🕐
815	Bus Routes	🤯 困难	🕐
816	Ambiguous Coordinates	🤔 一般	🕐
817	Linked List Components	🤔 一般	🕐
818	Race Car	🤯 困难	🕐
819	Most Common Word	🤩 简单	🕐
707	Design Linked List	🤔 一般	✅
820	Short Encoding of Words	🤔 一般	🕐
821	Shortest Distance to a Character	🤩 简单	🕐
822	Card Flipping Game	🤔 一般	🕐
823	Binary Trees With Factors	🤔 一般	🕐
708	Insert into a Sorted Circular Linked List	🤔 一般	🕐
824	Goat Latin	🤩 简单	🕐
825	Friends Of Appropriate Ages	🤔 一般	🕐
826	Most Profit Assigning Work	🤔 一般	🕐
827	Making A Large Island	🤯 困难	🕐
828	Count Unique Characters of All Substrings of a Given String	🤯 困难	🕐
829	Consecutive Numbers Sum	🤯 困难	🕐
830	Positions of Large Groups	🤩 简单	🕐
831	Masking Personal Information	🤔 一般	🕐
641	Design Circular Deque	🤔 一般	🕐
622	Design Circular Queue	🤔 一般	🕐
832	Flipping an Image	🤩 简单	🕐
833	Find And Replace in String	🤔 一般	🕐
834	Sum of Distances in Tree	🤯 困难	🕐
835	Image Overlap	🤔 一般	🕐
489	Robot Room Cleaner	🤯 困难	🕐
836	Rectangle Overlap	🤩 简单	🕐
837	New 21 Game	🤔 一般	🕐
838	Push Dominoes	🤔 一般	🕐
839	Similar String Groups	🤯 困难	🕐
840	Magic Squares In Grid	🤔 一般	🕐
841	Keys and Rooms	🤔 一般	🕐
842	Split Array into Fibonacci Sequence	🤔 一般	🕐
843	Guess the Word	🤯 困难	🕐
844	Backspace String Compare	🤩 简单	🕐
845	Longest Mountain in Array	🤔 一般	🕐
846	Hand of Straights	🤔 一般	🕐
847	Shortest Path Visiting All Nodes	🤯 困难	✅
848	Shifting Letters	🤔 一般	🕐
849	Maximize Distance to Closest Person	🤔 一般	🕐
850	Rectangle Area II	🤯 困难	🕐
851	Loud and Rich	🤔 一般	🕐
852	Peak Index in a Mountain Array	🤩 简单	🕐
853	Car Fleet	🤔 一般	🕐
854	K-Similar Strings	🤯 困难	🕐
855	Exam Room	🤔 一般	🕐
856	Score of Parentheses	🤔 一般	🕐
857	Minimum Cost to Hire K Workers	🤯 困难	🕐
858	Mirror Reflection	🤔 一般	🕐
859	Buddy Strings	🤩 简单	🕐
860	Lemonade Change	🤩 简单	🕐
861	Score After Flipping Matrix	🤔 一般	🕐
862	Shortest Subarray with Sum at Least K	🤯 困难	🕐
863	All Nodes Distance K in Binary Tree	🤔 一般	🕐
710	Random Pick with Blacklist	🤯 困难	🕐
864	Shortest Path to Get All Keys	🤯 困难	🕐
865	Smallest Subtree with all the Deepest Nodes	🤔 一般	🕐
866	Prime Palindrome	🤔 一般	🕐
867	Transpose Matrix	🤩 简单	🕐
868	Binary Gap	🤩 简单	🕐
869	Reordered Power of 2	🤔 一般	🕐
870	Advantage Shuffle	🤔 一般	🕐
871	Minimum Number of Refueling Stops	🤯 困难	🕐
470	Implement Rand10() Using Rand7()	🤔 一般	🕐
872	Leaf-Similar Trees	🤩 简单	✅
873	Length of Longest Fibonacci Subsequence	🤔 一般	🕐
874	Walking Robot Simulation	🤔 一般	🕐
875	Koko Eating Bananas	🤔 一般	🕐
876	Middle of the Linked List	🤩 简单	🕐
877	Stone Game	🤔 一般	🕐
878	Nth Magical Number	🤯 困难	🕐
879	Profitable Schemes	🤯 困难	🕐
528	Random Pick with Weight	🤔 一般	🕐
519	Random Flip Matrix	🤔 一般	🕐
497	Random Point in Non-overlapping Rectangles	🤔 一般	🕐
478	Generate Random Point in a Circle	🤔 一般	🕐
880	Decoded String at Index	🤔 一般	🕐
881	Boats to Save People	🤔 一般	🆖
882	Reachable Nodes In Subdivided Graph	🤯 困难	🕐
883	Projection Area of 3D Shapes	🤩 简单	🕐
884	Uncommon Words from Two Sentences	🤩 简单	🕐
885	Spiral Matrix III	🤔 一般	🕐
886	Possible Bipartition	🤔 一般	🕐
887	Super Egg Drop	🤯 困难	🕐
888	Fair Candy Swap	🤩 简单	🕐
889	Construct Binary Tree from Preorder and Postorder Traversal	🤔 一般	🕐
890	Find and Replace Pattern	🤔 一般	🕐
891	Sum of Subsequence Widths	🤯 困难	🕐
892	Surface Area of 3D Shapes	🤩 简单	🕐
893	Groups of Special-Equivalent Strings	🤔 一般	🕐
894	All Possible Full Binary Trees	🤔 一般	🕐
895	Maximum Frequency Stack	🤯 困难	🕐
896	Monotonic Array	🤩 简单	🕐
897	Increasing Order Search Tree	🤩 简单	🕐
898	Bitwise ORs of Subarrays	🤔 一般	🕐
899	Orderly Queue	🤯 困难	🕐
900	RLE Iterator	🤔 一般	🕐
901	Online Stock Span	🤔 一般	🕐
902	Numbers At Most N Given Digit Set	🤯 困难	🕐
903	Valid Permutations for DI Sequence	🤯 困难	🕐
904	Fruit Into Baskets	🤔 一般	🕐
905	Sort Array By Parity	🤩 简单	🕐
906	Super Palindromes	🤯 困难	🕐
907	Sum of Subarray Minimums	🤔 一般	🕐
908	Smallest Range I	🤩 简单	🕐
909	Snakes and Ladders	🤔 一般	🕐
910	Smallest Range II	🤔 一般	🕐
911	Online Election	🤔 一般	🕐
912	Sort an Array	🤔 一般	🕐
913	Cat and Mouse	🤯 困难	🕐
914	X of a Kind in a Deck of Cards	🤩 简单	✅
915	Partition Array into Disjoint Intervals	🤔 一般	🕐
916	Word Subsets	🤔 一般	🕐
917	Reverse Only Letters	🤩 简单	🕐
918	Maximum Sum Circular Subarray	🤔 一般	🕐
919	Complete Binary Tree Inserter	🤔 一般	🕐
920	Number of Music Playlists	🤯 困难	🕐
921	Minimum Add to Make Parentheses Valid	🤔 一般	🕐
922	Sort Array By Parity II	🤩 简单	🕐
923	3Sum With Multiplicity	🤔 一般	🕐
924	Minimize Malware Spread	🤯 困难	🕐
925	Long Pressed Name	🤩 简单	🕐
926	Flip String to Monotone Increasing	🤔 一般	🕐
927	Three Equal Parts	🤯 困难	🆖
928	Minimize Malware Spread II	🤯 困难	🕐
929	Unique Email Addresses	🤩 简单	🕐
930	Binary Subarrays With Sum	🤔 一般	✅
931	Minimum Falling Path Sum	🤔 一般	🕐
932	Beautiful Array	🤔 一般	🕐
933	Number of Recent Calls	🤩 简单	🕐
934	Shortest Bridge	🤔 一般	🕐
935	Knight Dialer	🤔 一般	🕐
936	Stamping The Sequence	🤯 困难	🕐
937	Reorder Data in Log Files	🤩 简单	🕐
938	Range Sum of BST	🤩 简单	🕐
939	Minimum Area Rectangle	🤔 一般	🕐
940	Distinct Subsequences II	🤯 困难	🕐
941	Valid Mountain Array	🤩 简单	🕐
942	DI String Match	🤩 简单	🕐
943	Find the Shortest Superstring	🤯 困难	🕐
944	Delete Columns to Make Sorted	🤩 简单	🕐
945	Minimum Increment to Make Array Unique	🤔 一般	🕐
946	Validate Stack Sequences	🤔 一般	🕐
947	Most Stones Removed with Same Row or Column	🤔 一般	🕐
948	Bag of Tokens	🤔 一般	🕐
949	Largest Time for Given Digits	🤔 一般	🕐
950	Reveal Cards In Increasing Order	🤔 一般	🕐
951	Flip Equivalent Binary Trees	🤔 一般	🕐
952	Largest Component Size by Common Factor	🤯 困难	🕐
953	Verifying an Alien Dictionary	🤩 简单	🕐
954	Array of Doubled Pairs	🤔 一般	🕐
955	Delete Columns to Make Sorted II	🤔 一般	🕐
956	Tallest Billboard	🤯 困难	🕐
957	Prison Cells After N Days	🤔 一般	🕐
958	Check Completeness of a Binary Tree	🤔 一般	🕐
959	Regions Cut By Slashes	🤔 一般	🕐
960	Delete Columns to Make Sorted III	🤯 困难	🕐
961	N-Repeated Element in Size 2N Array	🤩 简单	🕐
962	Maximum Width Ramp	🤔 一般	🕐
963	Minimum Area Rectangle II	🤔 一般	🕐
964	Least Operators to Express Number	🤯 困难	🕐
965	Univalued Binary Tree	🤩 简单	🕐
966	Vowel Spellchecker	🤔 一般	🕐
967	Numbers With Same Consecutive Differences	🤔 一般	🕐
968	Binary Tree Cameras	🤯 困难	🕐
969	Pancake Sorting	🤔 一般	🕐
970	Powerful Integers	🤔 一般	🕐
971	Flip Binary Tree To Match Preorder Traversal	🤔 一般	🕐
972	Equal Rational Numbers	🤯 困难	🕐
509	Fibonacci Number	🤩 简单	🕐
973	K Closest Points to Origin	🤔 一般	🕐
974	Subarray Sums Divisible by K	🤔 一般	🕐
975	Odd Even Jump	🤯 困难	🕐
976	Largest Perimeter Triangle	🤩 简单	🕐
977	Squares of a Sorted Array	🤩 简单	🕐
978	Longest Turbulent Subarray	🤔 一般	🕐
979	Distribute Coins in Binary Tree	🤔 一般	🕐
980	Unique Paths III	🤯 困难	🕐
981	Time Based Key-Value Store	🤔 一般	🕐
982	Triples with Bitwise AND Equal To Zero	🤯 困难	🕐
983	Minimum Cost For Tickets	🤔 一般	🕐
984	String Without AAA or BBB	🤔 一般	🕐
985	Sum of Even Numbers After Queries	🤔 一般	🕐
986	Interval List Intersections	🤔 一般	🕐
987	Vertical Order Traversal of a Binary Tree	🤯 困难	🕐
988	Smallest String Starting From Leaf	🤔 一般	🕐
989	Add to Array-Form of Integer	🤩 简单	🕐
990	Satisfiability of Equality Equations	🤔 一般	🕐
991	Broken Calculator	🤔 一般	🕐
992	Subarrays with K Different Integers	🤯 困难	🕐
993	Cousins in Binary Tree	🤩 简单	✅
994	Rotting Oranges	🤔 一般	🕐
995	Minimum Number of K Consecutive Bit Flips	🤯 困难	🕐
996	Number of Squareful Arrays	🤯 困难	🕐
997	Find the Town Judge	🤩 简单	🕐
998	Maximum Binary Tree II	🤔 一般	🕐
999	Available Captures for Rook	🤩 简单	🕐
1000	Minimum Cost to Merge Stones	🤯 困难	🕐
1001	Grid Illumination	🤯 困难	🕐
1002	Find Common Characters	🤩 简单	🕐
1003	Check If Word Is Valid After Substitutions	🤔 一般	🕐
1004	Max Consecutive Ones III	🤔 一般	🕐
1005	Maximize Sum Of Array After K Negations	🤩 简单	🕐
1006	Clumsy Factorial	🤔 一般	🆖
1007	Minimum Domino Rotations For Equal Row	🤔 一般	🕐
1008	Construct Binary Search Tree from Preorder Traversal	🤔 一般	🕐
1055	Shortest Way to Form String	🤔 一般	🕐
1057	Campus Bikes	🤔 一般	🕐
1058	Minimize Rounding Error to Meet Target	🤔 一般	🕐
1009	Complement of Base 10 Integer	🤩 简单	🕐
1010	Pairs of Songs With Total Durations Divisible by 60	🤔 一般	🕐
1011	Capacity To Ship Packages Within D Days	🤔 一般	🕐
1012	Numbers With Repeated Digits	🤯 困难	🕐
1061	Lexicographically Smallest Equivalent String	🤔 一般	🕐
1060	Missing Element in Sorted Array	🤔 一般	🕐
1062	Longest Repeating Substring	🤔 一般	🕐
1063	Number of Valid Subarrays	🤯 困难	🕐
1013	Partition Array Into Three Parts With Equal Sum	🤩 简单	🕐
1014	Best Sightseeing Pair	🤔 一般	🕐
1015	Smallest Integer Divisible by K	🤔 一般	🕐
1016	Binary String With Substrings Representing 1 To N	🤔 一般	🕐
1064	Fixed Point	🤩 简单	🕐
1066	Campus Bikes II	🤔 一般	🕐
1067	Digit Count in Range	🤯 困难	🕐
1056	Confusing Number	🤩 简单	🕐
1017	Convert to Base -2	🤔 一般	🕐
1018	Binary Prefix Divisible By 5	🤩 简单	🕐
1019	Next Greater Node In Linked List	🤔 一般	🕐
1020	Number of Enclaves	🤔 一般	🕐
1086	High Five	🤩 简单	🕐
1065	Index Pairs of a String	🤩 简单	🕐
1087	Brace Expansion	🤔 一般	🕐
1088	Confusing Number II	🤯 困难	🕐
1021	Remove Outermost Parentheses	🤩 简单	🕐
1022	Sum of Root To Leaf Binary Numbers	🤩 简单	🕐
1023	Camelcase Matching	🤔 一般	🕐
1024	Video Stitching	🤔 一般	✅
1085	Sum of Digits in the Minimum Number	🤩 简单	🕐
1099	Two Sum Less Than K	🤩 简单	🕐
1100	Find K-Length Substrings With No Repeated Characters	🤔 一般	🕐
1101	The Earliest Moment When Everyone Become Friends	🤔 一般	🕐
1025	Divisor Game	🤩 简单	🕐
1027	Longest Arithmetic Subsequence	🤔 一般	🕐
1118	Number of Days in a Month	🤩 简单	🕐
1119	Remove Vowels from a String	🤩 简单	✅
1134	Armstrong Number	🤩 简单	🕐
1120	Maximum Average Subtree	🤔 一般	🕐
1026	Maximum Difference Between Node and Ancestor	🤔 一般	🕐
1028	Recover a Tree From Preorder Traversal	🤯 困难	🕐
1030	Matrix Cells in Distance Order	🤩 简单	🆖
1029	Two City Scheduling	🤔 一般	🕐
1031	Maximum Sum of Two Non-Overlapping Subarrays	🤔 一般	🕐
1032	Stream of Characters	🤯 困难	🕐
1133	Largest Unique Number	🤩 简单	🕐
1102	Path With Maximum Minimum Value	🤔 一般	🕐
1135	Connecting Cities With Minimum Cost	🤔 一般	🕐
1136	Parallel Courses	🤔 一般	🕐
1150	Check If a Number Is Majority Element in a Sorted Array	🤩 简单	🕐
1033	Moving Stones Until Consecutive	🤔 一般	🕐
1034	Coloring A Border	🤔 一般	🕐
1035	Uncrossed Lines	🤔 一般	🆖
1036	Escape a Large Maze	🤯 困难	🕐
1151	Minimum Swaps to Group All 1's Together	🤔 一般	🕐
1152	Analyze User Website Visit Pattern	🤔 一般	🕐
1039	Minimum Score Triangulation of Polygon	🤔 一般	🕐
1160	Find Words That Can Be Formed by Characters	🤩 简单	🕐
1040	Moving Stones Until Consecutive II	🤔 一般	🕐
1038	Binary Search Tree to Greater Sum Tree	🤔 一般	🕐
1037	Valid Boomerang	🤩 简单	🕐
1161	Maximum Level Sum of a Binary Tree	🤔 一般	🕐
1162	As Far from Land as Possible	🤔 一般	🕐
1121	Divide Array Into Increasing Sequences	🤯 困难	🕐
1041	Robot Bounded In Circle	🤔 一般	🕐
1042	Flower Planting With No Adjacent	🤔 一般	🕐
1043	Partition Array for Maximum Sum	🤔 一般	🕐
1044	Longest Duplicate Substring	🤯 困难	🕐
1165	Single-Row Keyboard	🤩 简单	🕐
1153	String Transforms Into Another String	🤯 困难	🕐
1166	Design File System	🤔 一般	🕐
1167	Minimum Cost to Connect Sticks	🤔 一般	🕐
1046	Last Stone Weight	🤩 简单	🕐
1047	Remove All Adjacent Duplicates In String	🤩 简单	🕐
1048	Longest String Chain	🤔 一般	🕐
1049	Last Stone Weight II	🤔 一般	🕐
1180	Count Substrings with Only One Distinct Letter	🤩 简单	🕐
1181	Before and After Puzzle	🤔 一般	🕐
1163	Last Substring in Lexicographical Order	🤯 困难	🕐
1182	Shortest Distance to Target Color	🤔 一般	🕐
1051	Height Checker	🤩 简单	🕐
1052	Grumpy Bookstore Owner	🤔 一般	🕐
1053	Previous Permutation With One Swap	🤔 一般	🕐
1054	Distant Barcodes	🤔 一般	🕐
1196	How Many Apples Can You Put into the Basket	🤩 简单	🕐
1197	Minimum Knight Moves	🤔 一般	🕐
1198	Find Smallest Common Element in All Rows	🤔 一般	🕐
1168	Optimize Water Distribution in a Village	🤯 困难	🕐
1074	Number of Submatrices That Sum to Target	🤯 困难	🕐
1071	Greatest Common Divisor of Strings	🤩 简单	🕐
1072	Flip Columns For Maximum Number of Equal Rows	🤔 一般	🕐
1073	Adding Two Negabinary Numbers	🤔 一般	🕐
1213	Intersection of Three Sorted Arrays	🤩 简单	🕐
1214	Two Sum BSTs	🤔 一般	🕐
1215	Stepping Numbers	🤔 一般	🕐
1183	Maximum Number of Ones	🤯 困难	🕐
1078	Occurrences After Bigram	🤩 简单	🕐
1080	Insufficient Nodes in Root to Leaf Paths	🤔 一般	🕐
1081	Smallest Subsequence of Distinct Characters	🤔 一般	🆖
1079	Letter Tile Possibilities	🤔 一般	🕐
1228	Missing Number In Arithmetic Progression	🤩 简单	🕐
1229	Meeting Scheduler	🤔 一般	🕐
1230	Toss Strange Coins	🤔 一般	🕐
1199	Minimum Time to Build Blocks	🤯 困难	🕐
1089	Duplicate Zeros	🤩 简单	🕐
1090	Largest Values From Labels	🤔 一般	🕐
1092	Shortest Common Supersequence	🤯 困难	🕐
1091	Shortest Path in Binary Matrix	🤔 一般	🕐
1243	Array Transformation	🤩 简单	🕐
1244	Design A Leaderboard	🤔 一般	🕐
1245	Tree Diameter	🤔 一般	🕐
1216	Valid Palindrome III	🤯 困难	🕐
1093	Statistics from a Large Sample	🤔 一般	🕐
1094	Car Pooling	🤔 一般	🕐
1095	Find in Mountain Array	🤯 困难	🕐
1096	Brace Expansion II	🤯 困难	🕐
1256	Encode Number	🤔 一般	🕐
1257	Smallest Common Region	🤔 一般	🕐
1258	Synonymous Sentences	🤔 一般	🕐
1231	Divide Chocolate	🤯 困难	🕐
1104	Path In Zigzag Labelled Binary Tree	🤔 一般	🕐
1103	Distribute Candies to People	🤩 简单	🕐
1105	Filling Bookcase Shelves	🤔 一般	🕐
1106	Parsing A Boolean Expression	🤯 困难	🕐
1271	Hexspeak	🤩 简单	🕐
1272	Remove Interval	🤔 一般	🕐
1273	Delete Tree Nodes	🤔 一般	🕐
1246	Palindrome Removal	🤯 困难	🕐
1108	Defanging an IP Address	🤩 简单	🕐
1109	Corporate Flight Bookings	🤔 一般	✅
1110	Delete Nodes And Return Forest	🤔 一般	🕐
1111	Maximum Nesting Depth of Two Valid Parentheses Strings	🤔 一般	🕐
1619	Mean of Array After Removing Some Elements	🤩 简单	🕐
1286	Iterator for Combination	🤔 一般	🕐
1291	Sequential Digits	🤔 一般	🕐
1259	Handshakes That Don't Cross	🤯 困难	🕐
1122	Relative Sort Array	🤩 简单	🕐
1123	Lowest Common Ancestor of Deepest Leaves	🤔 一般	🕐
1124	Longest Well-Performing Interval	🤔 一般	🕐
1125	Smallest Sufficient Team	🤯 困难	🕐
1287	Element Appearing More Than 25% In Sorted Array	🤩 简单	🕐
1288	Remove Covered Intervals	🤔 一般	🕐
1627	Graph Connectivity With Threshold	🤯 困难	🕐
1289	Minimum Falling Path Sum II	🤯 困难	🕐
1128	Number of Equivalent Domino Pairs	🤩 简单	🕐
1130	Minimum Cost Tree From Leaf Values	🤔 一般	🕐
1129	Shortest Path with Alternating Colors	🤔 一般	🕐
1131	Maximum of Absolute Value Expression	🤔 一般	🕐
1299	Replace Elements with Greatest Element on Right Side	🤩 简单	🕐
1300	Sum of Mutated Array Closest to Target	🤔 一般	🕐
1274	Number of Ships in a Rectangle	🤯 困难	🕐
1301	Number of Paths with Max Score	🤯 困难	🕐
1137	N-th Tribonacci Number	🤩 简单	🕐
1138	Alphabet Board Path	🤔 一般	🕐
1139	Largest 1-Bordered Square	🤔 一般	🕐
1140	Stone Game II	🤔 一般	🕐
1313	Decompress Run-Length Encoded List	🤩 简单	🕐
1314	Matrix Block Sum	🤔 一般	🕐
1315	Sum of Nodes with Even-Valued Grandparent	🤔 一般	🕐
1316	Distinct Echo Substrings	🤯 困难	🕐
1144	Decrease Elements To Make Array Zigzag	🤔 一般	🕐
1145	Binary Tree Coloring Game	🤔 一般	🕐
1146	Snapshot Array	🤔 一般	🕐
1143	Longest Common Subsequence	🤔 一般	🕐
1147	Longest Chunked Palindrome Decomposition	🤯 困难	🕐
1328	Break a Palindrome	🤔 一般	🕐
1329	Sort the Matrix Diagonally	🤔 一般	🕐
1302	Deepest Leaves Sum	🤔 一般	🕐
1330	Reverse Subarray To Maximize Array Value	🤯 困难	🕐
1331	Rank Transform of an Array	🤩 简单	🕐
1632	Rank Transform of a Matrix	🤯 困难	🕐
1154	Day of the Year	🤩 简单	🕐
1156	Swap For Longest Repeated Character Substring	🤔 一般	🕐
1157	Online Majority Element In Subarray	🤯 困难	🕐
1155	Number of Dice Rolls With Target Sum	🤔 一般	🕐
1935	Maximum Number of Words You Can Type	🤩 简单	🕐
1171	Remove Zero Sum Consecutive Nodes from Linked List	🤔 一般	🕐
1172	Dinner Plate Stacks	🤯 困难	🕐
1236	Web Crawler	🤔 一般	🕐
1169	Invalid Transactions	🤔 一般	🕐
1170	Compare Strings by Frequency of the Smallest Character	🤔 一般	🕐
1360	Number of Days Between Two Dates	🤩 简单	🕐
1361	Validate Binary Tree Nodes	🤔 一般	🕐
1362	Closest Divisors	🤔 一般	🕐
1363	Largest Multiple of Three	🤯 困难	🕐
1175	Prime Arrangements	🤩 简单	🕐
1176	Diet Plan Performance	🤩 简单	🕐
1177	Can Make Palindrome from Substring	🤔 一般	🕐
1178	Number of Valid Words for Each Puzzle	🤯 困难	🕐
1507	Reformat Date	🤩 简单	🕐
1390	Four Divisors	🤔 一般	🕐
1382	Balance a Binary Search Tree	🤔 一般	🕐
1425	Constrained Subsequence Sum	🤯 困难	🕐
1184	Distance Between Bus Stops	🤩 简单	🕐
1186	Maximum Subarray Sum with One Deletion	🤔 一般	🕐
1185	Day of the Week	🤩 简单	✅
1187	Make Array Strictly Increasing	🤯 困难	✅
1550	Three Consecutive Odds	🤩 简单	🕐
2080	Range Frequency Queries	🤔 一般	🕐
1954	Minimum Garden Perimeter to Collect Enough Apples	🤔 一般	🕐
1483	Kth Ancestor of a Tree Node	🤯 困难	✅
1189	Maximum Number of Balloons	🤩 简单	🕐
1190	Reverse Substrings Between Each Pair of Parentheses	🤔 一般	🕐
1191	K-Concatenation Maximum Sum	🤔 一般	🕐
1192	Critical Connections in a Network	🤯 困难	🕐
1957	Delete Characters to Make Fancy String	🤩 简单	🕐
2139	Minimum Moves to Reach Target Score	🤔 一般	🕐
1405	Longest Happy String	🤔 一般	🕐
1944	Number of Visible People in a Queue	🤯 困难	🕐
1200	Minimum Absolute Difference	🤩 简单	🕐
1201	Ugly Number III	🤔 一般	🕐
1202	Smallest String With Swaps	🤔 一般	✅
1203	Sort Items by Groups Respecting Dependencies	🤯 困难	🕐
2079	Watering Plants	🤔 一般	🕐
1895	Largest Magic Square	🤔 一般	🕐
1916	Count Ways to Build Rooms in an Ant Colony	🤯 困难	🕐
1207	Unique Number of Occurrences	🤩 简单	🕐
1209	Remove All Adjacent Duplicates in String II	🤔 一般	🕐
1208	Get Equal Substrings Within Budget	🤔 一般	🕐
1210	Minimum Moves to Reach Target with Rotations	🤯 困难	🕐
1706	Where Will the Ball Fall	🤔 一般	🕐
1514	Path with Maximum Probability	🤔 一般	🕐
1862	Sum of Floored Pairs	🤯 困难	🕐
1217	Minimum Cost to Move Chips to The Same Position	🤩 简单	🕐
1218	Longest Arithmetic Subsequence of Given Difference	🤔 一般	🕐
1219	Path with Maximum Gold	🤔 一般	✅
1220	Count Vowels Permutation	🤯 困难	✅
1960	Maximum Product of the Length of Two Palindromic Substrings	🤯 困难	🕐
1206	Design Skiplist	🤯 困难	🕐
1221	Split a String in Balanced Strings	🤩 简单	✅
1222	Queens That Can Attack the King	🤔 一般	🕐
1223	Dice Roll Simulation	🤯 困难	🕐
1224	Maximum Equal Frequency	🤯 困难	🕐
1427	Perform String Shifts	🤩 简单	🕐
1232	Check If It Is a Straight Line	🤩 简单	🕐
1233	Remove Sub-Folders from the Filesystem	🤔 一般	🕐
1234	Replace the Substring for Balanced String	🤔 一般	🕐
1235	Maximum Profit in Job Scheduling	🤯 困难	🕐
1237	Find Positive Integer Solution for a Given Equation	🤔 一般	🕐
1238	Circular Permutation in Binary Representation	🤔 一般	🕐
1239	Maximum Length of a Concatenated String with Unique Characters	🤔 一般	🕐
1240	Tiling a Rectangle with the Fewest Squares	🤯 困难	🕐
1227	Airplane Seat Assignment Probability	🤔 一般	🕐
1726	Tuple with Same Product	🤔 一般	🕐
1429	First Unique Number	🤔 一般	🕐
1691	Maximum Height by Stacking Cuboids	🤯 困难	🕐
1247	Minimum Swaps to Make Strings Equal	🤔 一般	🕐
1248	Count Number of Nice Subarrays	🤔 一般	🕐
1249	Minimum Remove to Make Valid Parentheses	🤔 一般	🕐
1250	Check If It Is a Good Array	🤯 困难	🕐
1428	Leftmost Column with at Least a One	🤔 一般	🕐
1252	Cells with Odd Values in a Matrix	🤩 简单	🕐
1253	Reconstruct a 2-Row Binary Matrix	🤔 一般	🕐
1254	Number of Closed Islands	🤔 一般	🕐
1255	Maximum Score Words Formed by Letters	🤯 困难	🕐
1618	Maximum Font to Fit a Sentence in a Screen	🤔 一般	🕐
1260	Shift 2D Grid	🤩 简单	🕐
1261	Find Elements in a Contaminated Binary Tree	🤔 一般	🕐
1262	Greatest Sum Divisible by Three	🤔 一般	🕐
1263	Minimum Moves to Move a Box to Their Target Location	🤯 困难	🕐
1426	Counting Elements	🤩 简单	🕐
1266	Minimum Time Visiting All Points	🤩 简单	🕐
1267	Count Servers that Communicate	🤔 一般	🕐
1268	Search Suggestions System	🤔 一般	🕐
1269	Number of Ways to Stay in the Same Place After Some Steps	🤯 困难	✅
1275	Find Winner on a Tic Tac Toe Game	🤩 简单	🕐
1276	Number of Burgers with No Waste of Ingredients	🤔 一般	✅
1277	Count Square Submatrices with All Ones	🤔 一般	🕐
1278	Palindrome Partitioning III	🤯 困难	🕐
1265	Print Immutable Linked List in Reverse	🤔 一般	🕐
1281	Subtract the Product and Sum of Digits of an Integer	🤩 简单	🕐
1282	Group the People Given the Group Size They Belong To	🤔 一般	🕐
1283	Find the Smallest Divisor Given a Threshold	🤔 一般	🕐
1284	Minimum Number of Flips to Convert Binary Matrix to Zero Matrix	🤯 困难	🕐
1290	Convert Binary Number in a Linked List to Integer	🤩 简单	🕐
1292	Maximum Side Length of a Square with Sum Less than or Equal to Threshold	🤔 一般	🕐
1293	Shortest Path in a Grid with Obstacles Elimination	🤯 困难	🕐
1295	Find Numbers with Even Number of Digits	🤩 简单	🕐
1296	Divide Array in Sets of K Consecutive Numbers	🤔 一般	🕐
1297	Maximum Number of Occurrences of a Substring	🤔 一般	🕐
1298	Maximum Candies You Can Get from Boxes	🤯 困难	🕐
1304	Find N Unique Integers Sum up to Zero	🤩 简单	🕐
1305	All Elements in Two Binary Search Trees	🤔 一般	🕐
1306	Jump Game III	🤔 一般	🕐
1307	Verbal Arithmetic Puzzle	🤯 困难	🕐
1430	Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree	🤔 一般	🕐
1309	Decrypt String from Alphabet to Integer Mapping	🤩 简单	🕐
1310	XOR Queries of a Subarray	🤔 一般	✅
1311	Get Watched Videos by Your Friends	🤔 一般	🕐
1312	Minimum Insertion Steps to Make a String Palindrome	🤯 困难	🕐
1317	Convert Integer to the Sum of Two No-Zero Integers	🤩 简单	🕐
1318	Minimum Flips to Make a OR b Equal to c	🤔 一般	✅
1319	Number of Operations to Make Network Connected	🤔 一般	🕐
1320	Minimum Distance to Type a Word Using Two Fingers	🤯 困难	✅
1342	Number of Steps to Reduce a Number to Zero	🤩 简单	🕐
1343	Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold	🤔 一般	🕐
1344	Angle Between Hands of a Clock	🤔 一般	🕐
1345	Jump Game IV	🤯 困难	🕐
1323	Maximum 69 Number	🤩 简单	🕐
1324	Print Words Vertically	🤔 一般	🕐
1325	Delete Leaves With a Given Value	🤔 一般	🕐
1326	Minimum Number of Taps to Open to Water a Garden	🤯 困难	🕐
1332	Remove Palindromic Subsequences	🤩 简单	🕐
1333	Filter Restaurants by Vegan-Friendly, Price and Distance	🤔 一般	🕐
1334	Find the City With the Smallest Number of Neighbors at a Threshold Distance	🤔 一般	🕐
1335	Minimum Difficulty of a Job Schedule	🤯 困难	🕐
1356	Sort Integers by The Number of 1 Bits	🤩 简单	🕐
1357	Apply Discount Every n Orders	🤔 一般	🕐
1358	Number of Substrings Containing All Three Characters	🤔 一般	🕐
1359	Count All Valid Pickup and Delivery Options	🤯 困难	🕐
1337	The K Weakest Rows in a Matrix	🤩 简单	🕐
1338	Reduce Array Size to The Half	🤔 一般	🕐
1339	Maximum Product of Splitted Binary Tree	🤔 一般	🕐
1340	Jump Game V	🤯 困难	🕐
1346	Check If N and Its Double Exist	🤩 简单	🕐
1347	Minimum Number of Steps to Make Two Strings Anagram	🤔 一般	🕐
1348	Tweet Counts Per Frequency	🤔 一般	✅
1349	Maximum Students Taking Exam	🤯 困难	🕐
1370	Increasing Decreasing String	🤩 简单	🕐
1371	Find the Longest Substring Containing Vowels in Even Counts	🤔 一般	🕐
1372	Longest ZigZag Path in a Binary Tree	🤔 一般	🕐
1373	Maximum Sum BST in Binary Tree	🤯 困难	🕐
1351	Count Negative Numbers in a Sorted Matrix	🤩 简单	🕐
1352	Product of the Last K Numbers	🤔 一般	🕐
1353	Maximum Number of Events That Can Be Attended	🤔 一般	🕐
1354	Construct Target Array With Multiple Sums	🤯 困难	✅
1365	How Many Numbers Are Smaller Than the Current Number	🤩 简单	🕐
1366	Rank Teams by Votes	🤔 一般	🕐
1367	Linked List in Binary Tree	🤔 一般	🕐
1368	Minimum Cost to Make at Least One Valid Path in a Grid	🤯 困难	🕐
1385	Find the Distance Value Between Two Arrays	🤩 简单	🕐
1386	Cinema Seat Allocation	🤔 一般	🕐
1387	Sort Integers by The Power Value	🤔 一般	🕐
1388	Pizza With 3n Slices	🤯 困难	🕐
1374	Generate a String With Characters That Have Odd Counts	🤩 简单	🕐
1375	Number of Times Binary String Is Prefix-Aligned	🤔 一般	🕐
1376	Time Needed to Inform All Employees	🤔 一般	🕐
1377	Frog Position After T Seconds	🤯 困难	🕐
1380	Lucky Numbers in a Matrix	🤩 简单	🕐
1381	Design a Stack With Increment Operation	🤔 一般	🕐
1379	Find a Corresponding Node of a Binary Tree in a Clone of That Tree	🤔 一般	🕐
1383	Maximum Performance of a Team	🤯 困难	🕐
1399	Count Largest Group	🤩 简单	🕐
1401	Circle and Rectangle Overlapping	🤔 一般	🕐
1400	Construct K Palindrome Strings	🤔 一般	🕐
1402	Reducing Dishes	🤯 困难	🕐
1389	Create Target Array in the Given Order	🤩 简单	🕐
1391	Check if There is a Valid Path in a Grid	🤔 一般	🕐
1392	Longest Happy Prefix	🤯 困难	🕐
1394	Find Lucky Integer in an Array	🤩 简单	🕐
1395	Count Number of Teams	🤔 一般	🕐
1396	Design Underground System	🤔 一般	🕐
1397	Find All Good Strings	🤯 困难	🕐
1413	Minimum Value to Get Positive Step by Step Sum	🤩 简单	🕐
1414	Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	🤔 一般	🕐
1415	The k-th Lexicographical String of All Happy Strings of Length n	🤔 一般	🕐
1416	Restore The Array	🤯 困难	🕐
1403	Minimum Subsequence in Non-Increasing Order	🤩 简单	🕐
1404	Number of Steps to Reduce a Number in Binary Representation to One	🤔 一般	🕐
1406	Stone Game III	🤯 困难	🕐
1408	String Matching in an Array	🤩 简单	🕐
1409	Queries on a Permutation With Key	🤔 一般	🕐
1410	HTML Entity Parser	🤔 一般	🕐
1411	Number of Ways to Paint N × 3 Grid	🤯 困难	🕐
1431	Kids With the Greatest Number of Candies	🤩 简单	🕐
1432	Max Difference You Can Get From Changing an Integer	🤔 一般	🕐
1433	Check If a String Can Break Another String	🤔 一般	🕐
1434	Number of Ways to Wear Different Hats to Each Other	🤯 困难	🕐
1417	Reformat The String	🤩 简单	🕐
1418	Display Table of Food Orders in a Restaurant	🤔 一般	🕐
1419	Minimum Number of Frogs Croaking	🤔 一般	🕐
1420	Build Array Where You Can Find The Maximum Exactly K Comparisons	🤯 困难	🕐
1422	Maximum Score After Splitting a String	🤩 简单	🕐
1423	Maximum Points You Can Obtain from Cards	🤔 一般	🕐
1424	Diagonal Traverse II	🤔 一般	🕐
1446	Consecutive Characters	🤩 简单	🕐
1447	Simplified Fractions	🤔 一般	🕐
1448	Count Good Nodes in Binary Tree	🤔 一般	🕐
1449	Form Largest Integer With Digits That Add up to Target	🤯 困难	🕐
1436	Destination City	🤩 简单	🕐
1437	Check If All 1's Are at Least Length K Places Away	🤩 简单	✅
1438	Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	🤔 一般	🕐
1439	Find the Kth Smallest Sum of a Matrix With Sorted Rows	🤯 困难	🕐
1441	Build an Array With Stack Operations	🤩 简单	🕐
1442	Count Triplets That Can Form Two Arrays of Equal XOR	🤔 一般	✅
1443	Minimum Time to Collect All Apples in a Tree	🤔 一般	🕐
1444	Number of Ways of Cutting a Pizza	🤯 困难	🕐
1460	Make Two Arrays Equal by Reversing Sub-arrays	🤩 简单	🕐
1461	Check If a String Contains All Binary Codes of Size K	🤔 一般	🕐
1462	Course Schedule IV	🤔 一般	🕐
1463	Cherry Pickup II	🤯 困难	🕐
1450	Number of Students Doing Homework at a Given Time	🤩 简单	🕐
1451	Rearrange Words in a Sentence	🤔 一般	🕐
1452	People Whose List of Favorite Companies Is Not a Subset of Another List	🤔 一般	🕐
1453	Maximum Number of Darts Inside of a Circular Dartboard	🤯 困难	🕐
1455	Check If a Word Occurs As a Prefix of Any Word in a Sentence	🤩 简单	🕐
1456	Maximum Number of Vowels in a Substring of Given Length	🤔 一般	🕐
1457	Pseudo-Palindromic Paths in a Binary Tree	🤔 一般	🕐
1458	Max Dot Product of Two Subsequences	🤯 困难	🕐
1475	Final Prices With a Special Discount in a Shop	🤩 简单	🕐
1478	Allocate Mailboxes	🤯 困难	🕐
1476	Subrectangle Queries	🤔 一般	🕐
1477	Find Two Non-overlapping Sub-arrays Each With Target Sum	🤔 一般	🕐
1464	Maximum Product of Two Elements in an Array	🤩 简单	🕐
1465	Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts	🤔 一般	🕐
1466	Reorder Routes to Make All Paths Lead to the City Zero	🤔 一般	🕐
1467	Probability of a Two Boxes Having The Same Number of Distinct Balls	🤯 困难	🕐
1470	Shuffle the Array	🤩 简单	🕐
1471	The k Strongest Values in an Array	🤔 一般	🕐
1472	Design Browser History	🤔 一般	🕐
1473	Paint House III	🤯 困难	🕐
1491	Average Salary Excluding the Minimum and Maximum Salary	🤩 简单	🕐
1492	The kth Factor of n	🤔 一般	🕐
1493	Longest Subarray of 1's After Deleting One Element	🤔 一般	🕐
1494	Parallel Courses II	🤯 困难	🕐
1480	Running Sum of 1d Array	🤩 简单	✅
1481	Least Number of Unique Integers after K Removals	🤔 一般	🕐
1482	Minimum Number of Days to Make m Bouquets	🤔 一般	🕐
1469	Find All The Lonely Nodes	🤩 简单	🕐
1486	XOR Operation in an Array	🤩 简单	🕐
1487	Making File Names Unique	🤔 一般	🕐
1488	Avoid Flood in The City	🤔 一般	🕐
1489	Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree	🤯 困难	🕐
1508	Range Sum of Sorted Subarray Sums	🤔 一般	🕐
1509	Minimum Difference Between Largest and Smallest Value in Three Moves	🤔 一般	🕐
1510	Stone Game IV	🤯 困难	🕐
1474	Delete N Nodes After M Nodes of a Linked List	🤩 简单	🕐
1496	Path Crossing	🤩 简单	🕐
1497	Check If Array Pairs Are Divisible by k	🤔 一般	🕐
1498	Number of Subsequences That Satisfy the Given Sum Condition	🤔 一般	🕐
1499	Max Value of Equation	🤯 困难	🕐
1485	Clone Binary Tree With Random Pointer	🤔 一般	🕐
1502	Can Make Arithmetic Progression From Sequence	🤩 简单	🕐
1503	Last Moment Before All Ants Fall Out of a Plank	🤔 一般	🕐
1504	Count Submatrices With All Ones	🤔 一般	🕐
1505	Minimum Possible Integer After at Most K Adjacent Swaps On Digits	🤯 困难	🕐
1523	Count Odd Numbers in an Interval Range	🤩 简单	🕐
1524	Number of Sub-arrays With Odd Sum	🤔 一般	🕐
1525	Number of Good Ways to Split a String	🤔 一般	🕐
1526	Minimum Number of Increments on Subarrays to Form a Target Array	🤯 困难	🕐
1490	Clone N-ary Tree	🤔 一般	🕐
1512	Number of Good Pairs	🤩 简单	🕐
1513	Number of Substrings With Only 1s	🤔 一般	🕐
1531	String Compression II	🤯 困难	🕐
1515	Best Position for a Service Centre	🤯 困难	🕐
1500	Design a File Sharing System	🤔 一般	🕐
1518	Water Bottles	🤩 简单	🕐
1519	Number of Nodes in the Sub-Tree With the Same Label	🤔 一般	🕐
1520	Maximum Number of Non-Overlapping Substrings	🤯 困难	🕐
1521	Find a Value of a Mysterious Function Closest to Target	🤯 困难	🕐
1539	Kth Missing Positive Number	🤩 简单	🕐
1540	Can Convert String in K Moves	🤔 一般	🕐
1541	Minimum Insertions to Balance a Parentheses String	🤔 一般	🕐
1546	Maximum Number of Non-Overlapping Subarrays With Sum Equals Target	🤔 一般	🕐
1506	Find Root of N-Ary Tree	🤔 一般	🕐
1528	Shuffle String	🤩 简单	🕐
1529	Minimum Suffix Flips	🤔 一般	🕐
1530	Number of Good Leaf Nodes Pairs	🤔 一般	🕐
1516	Move Sub-Tree of N-Ary Tree	🤯 困难	🕐
1534	Count Good Triplets	🤩 简单	🕐
1535	Find the Winner of an Array Game	🤔 一般	🕐
1536	Minimum Swaps to Arrange a Binary Grid	🤔 一般	🕐
1537	Get the Maximum Score	🤯 困难	🕐
1556	Thousand Separator	🤩 简单	🕐
1557	Minimum Number of Vertices to Reach All Nodes	🤔 一般	🕐
1558	Minimum Numbers of Function Calls to Make Target Array	🤔 一般	🕐
1559	Detect Cycles in 2D Grid	🤔 一般	🕐
1522	Diameter of N-Ary Tree	🤔 一般	🕐
1544	Make The String Great	🤩 简单	🕐
1545	Find Kth Bit in Nth Binary String	🤔 一般	🕐
1542	Find Longest Awesome Substring	🤯 困难	🕐
1547	Minimum Cost to Cut a Stick	🤯 困难	🕐
1533	Find the Index of the Large Integer	🤔 一般	🕐
1551	Minimum Operations to Make Array Equal	🤔 一般	🕐
1552	Magnetic Force Between Two Balls	🤔 一般	🕐
1553	Minimum Number of Days to Eat N Oranges	🤯 困难	🕐
1572	Matrix Diagonal Sum	🤩 简单	✅
1573	Number of Ways to Split a String	🤔 一般	🕐
1574	Shortest Subarray to be Removed to Make Array Sorted	🤔 一般	🕐
1575	Count All Possible Routes	🤯 困难	🕐
1538	Guess the Majority in a Hidden Array	🤔 一般	🕐
1560	Most Visited Sector in a Circular Track	🤩 简单	🕐
1561	Maximum Number of Coins You Can Get	🤔 一般	🕐
1562	Find Latest Group of Size M	🤔 一般	🕐
1563	Stone Game V	🤯 困难	🕐
1548	The Most Similar Path in a Graph	🤯 困难	🕐
1566	Detect Pattern of Length M Repeated K or More Times	🤩 简单	🕐
1567	Maximum Length of Subarray With Positive Product	🤔 一般	🕐
1568	Minimum Number of Days to Disconnect Island	🤯 困难	🕐
1569	Number of Ways to Reorder Array to Get Same BST	🤯 困难	🕐
1588	Sum of All Odd Length Subarrays	🤩 简单	🕐
1590	Make Sum Divisible by P	🤔 一般	🕐
1589	Maximum Sum Obtained of Any Permutation	🤔 一般	🕐
1591	Strange Printer II	🤯 困难	🕐
1554	Strings Differ by One Character	🤔 一般	🕐
1576	Replace All ?'s to Avoid Consecutive Repeating Characters	🤩 简单	✅
1577	Number of Ways Where Square of Number Is Equal to Product of Two Numbers	🤔 一般	🕐
1578	Minimum Time to Make Rope Colorful	🤔 一般	🕐
1579	Remove Max Number of Edges to Keep Graph Fully Traversable	🤯 困难	🕐
1564	Put Boxes Into the Warehouse I	🤔 一般	🕐
1582	Special Positions in a Binary Matrix	🤩 简单	🕐
1583	Count Unhappy Friends	🤔 一般	🕐
1584	Min Cost to Connect All Points	🤔 一般	✅
1585	Check If String Is Transformable With Substring Sort Operations	🤯 困难	🕐
1603	Design Parking System	🤩 简单	✅
1604	Alert Using Same Key-Card Three or More Times in a One Hour Period	🤔 一般	🕐
1606	Find Servers That Handled Most Number of Requests	🤯 困难	🕐
1605	Find Valid Matrix Given Row and Column Sums	🤔 一般	🕐
1570	Dot Product of Two Sparse Vectors	🤔 一般	🕐
1592	Rearrange Spaces Between Words	🤩 简单	🕐
1593	Split a String Into the Max Number of Unique Substrings	🤔 一般	🕐
1594	Maximum Non Negative Product in a Matrix	🤔 一般	🕐
1595	Minimum Cost to Connect Two Groups of Points	🤯 困难	🕐
1580	Put Boxes Into the Warehouse II	🤔 一般	🕐
1598	Crawler Log Folder	🤩 简单	🕐
1599	Maximum Profit of Operating a Centennial Wheel	🤔 一般	🕐
1600	Throne Inheritance	🤔 一般	🕐
1601	Maximum Number of Achievable Transfer Requests	🤯 困难	🕐
1621	Number of Sets of K Non-Overlapping Line Segments	🤔 一般	🕐
1620	Coordinate With Maximum Network Quality	🤔 一般	🕐
1728	Cat and Mouse II	🤯 困难	✅
1622	Fancy Sequence	🤯 困难	🕐
1586	Binary Search Tree Iterator II	🤔 一般	🕐
1608	Special Array With X Elements Greater Than or Equal X	🤩 简单	🕐
1609	Even Odd Tree	🤔 一般	🕐
1611	Minimum One Bit Operations to Make Integers Zero	🤯 困难	🕐
1610	Maximum Number of Visible Points	🤯 困难	🕐
1597	Build Binary Expression Tree From Infix Expression	🤯 困难	🕐
1614	Maximum Nesting Depth of the Parentheses	🤩 简单	🕐
1615	Maximal Network Rank	🤔 一般	🕐
1616	Split Two Strings to Make Palindrome	🤔 一般	✅
1617	Count Subtrees With Max Distance Between Cities	🤯 困难	🕐
1636	Sort Array by Increasing Frequency	🤩 简单	🕐
1637	Widest Vertical Area Between Two Points Containing No Points	🤔 一般	🕐
1638	Count Substrings That Differ by One Character	🤔 一般	🕐
1639	Number of Ways to Form a Target String Given a Dictionary	🤯 困难	🕐
1602	Find Nearest Right Node in Binary Tree	🤔 一般	🕐
1624	Largest Substring Between Two Equal Characters	🤩 简单	🕐
1625	Lexicographically Smallest String After Applying Operations	🤔 一般	🕐
1626	Best Team With No Conflicts	🤔 一般	🕐
1612	Check If Two Expression Trees are Equivalent	🤔 一般	🕐
1629	Slowest Key	🤩 简单	✅
1630	Arithmetic Subarrays	🤔 一般	🕐
1631	Path With Minimum Effort	🤔 一般	🕐
1652	Defuse the Bomb	🤩 简单	🕐
1653	Minimum Deletions to Make String Balanced	🤔 一般	🕐
1654	Minimum Jumps to Reach Home	🤔 一般	🕐
1655	Distribute Repeating Integers	🤯 困难	🕐
1640	Check Array Formation Through Concatenation	🤩 简单	🕐
1641	Count Sorted Vowel Strings	🤔 一般	🕐
1642	Furthest Building You Can Reach	🤔 一般	🕐
1668	Maximum Repeating Substring	🤩 简单	🕐
1669	Merge In Between Linked Lists	🤔 一般	🕐
1671	Minimum Number of Removals to Make Mountain Array	🤯 困难	🕐
1670	Design Front Middle Back Queue	🤔 一般	🕐
1628	Design an Expression Tree With Evaluate Function	🤔 一般	🕐
1646	Get Maximum in Generated Array	🤩 简单	🕐
1647	Minimum Deletions to Make Character Frequencies Unique	🤔 一般	🕐
1648	Sell Diminishing-Valued Colored Balls	🤔 一般	🕐
1649	Create Sorted Array through Instructions	🤯 困难	🕐
1634	Add Two Polynomials Represented as Linked Lists	🤔 一般	🕐
1656	Design an Ordered Stream	🤩 简单	✅
1658	Minimum Operations to Reduce X to Zero	🤔 一般	🕐
1657	Determine if Two Strings Are Close	🤔 一般	🕐
1659	Maximize Grid Happiness	🤯 困难	🕐
1644	Lowest Common Ancestor of a Binary Tree II	🤔 一般	🕐
1662	Check If Two String Arrays are Equivalent	🤩 简单	🕐
1663	Smallest String With A Given Numeric Value	🤔 一般	🕐
1664	Ways to Make a Fair Array	🤔 一般	🕐
1665	Minimum Initial Energy to Finish Tasks	🤯 困难	🕐
1684	Count the Number of Consistent Strings	🤩 简单	🕐
1685	Sum of Absolute Differences in a Sorted Array	🤔 一般	🕐
1686	Stone Game VI	🤔 一般	🕐
1687	Delivering Boxes from Storage to Ports	🤯 困难	🕐
1650	Lowest Common Ancestor of a Binary Tree III	🤔 一般	🕐
1672	Richest Customer Wealth	🤩 简单	🕐
1673	Find the Most Competitive Subsequence	🤔 一般	🕐
1674	Minimum Moves to Make Array Complementary	🤔 一般	🕐
1675	Minimize Deviation in Array	🤯 困难	🕐
1660	Correct a Binary Tree	🤔 一般	🕐
1678	Goal Parser Interpretation	🤩 简单	🕐
1679	Max Number of K-Sum Pairs	🤔 一般	🕐
1681	Minimum Incompatibility	🤯 困难	🕐
1680	Concatenation of Consecutive Binary Numbers	🤔 一般	🕐
1700	Number of Students Unable to Eat Lunch	🤩 简单	🕐
1701	Average Waiting Time	🤔 一般	🕐
1702	Maximum Binary String After Change	🤔 一般	🕐
1703	Minimum Adjacent Swaps for K Consecutive Ones	🤯 困难	🕐
1688	Count of Matches in Tournament	🤩 简单	🕐
1689	Partitioning Into Minimum Number Of Deci-Binary Numbers	🤔 一般	🕐
1690	Stone Game VII	🤔 一般	🕐
1714	Sum Of Special Evenly-Spaced Elements In Array	🤯 困难	🕐
1666	Change the Root of a Binary Tree	🤔 一般	🕐
1694	Reformat Phone Number	🤩 简单	🕐
1695	Maximum Erasure Value	🤔 一般	🕐
1696	Jump Game VI	🤔 一般	🕐
1697	Checking Existence of Edge Length Limited Paths	🤯 困难	🕐
1676	Lowest Common Ancestor of a Binary Tree IV	🤔 一般	🕐
1716	Calculate Money in Leetcode Bank	🤩 简单	✅
1717	Maximum Score From Removing Substrings	🤔 一般	🕐
1718	Construct the Lexicographically Largest Valid Sequence	🤔 一般	🕐
1719	Number Of Ways To Reconstruct A Tree	🤯 困难	🕐
1682	Longest Palindromic Subsequence II	🤔 一般	🕐
1704	Determine if String Halves Are Alike	🤩 简单	🕐
1705	Maximum Number of Eaten Apples	🤔 一般	🕐
1723	Find Minimum Time to Finish All Jobs	🤯 困难	🕐
1707	Maximum XOR With an Element From Array	🤯 困难	🕐
1692	Count Ways to Distribute Candies	🤯 困难	🕐
1710	Maximum Units on a Truck	🤩 简单	🕐
1711	Count Good Meals	🤔 一般	🕐
1712	Ways to Split Array Into Three Subarrays	🤔 一般	🕐
1713	Minimum Operations to Make a Subsequence	🤯 困难	✅
1732	Find the Highest Altitude	🤩 简单	🕐
1733	Minimum Number of People to Teach	🤔 一般	🕐
1734	Decode XORed Permutation	🤔 一般	🕐
1735	Count Ways to Make Array With Product	🤯 困难	🕐
1698	Number of Distinct Substrings in a String	🤔 一般	🕐
1720	Decode XORed Array	🤩 简单	🕐
1722	Minimize Hamming Distance After Swap Operations	🤔 一般	🕐
1725	Number Of Rectangles That Can Form The Largest Square	🤩 简单	🕐
1742	Maximum Number of Balls in a Box	🤩 简单	🕐
1727	Largest Submatrix With Rearrangements	🤔 一般	🕐
1708	Largest Subarray Length K	🤩 简单	🕐
1748	Sum of Unique Elements	🤩 简单	🕐
1749	Maximum Absolute Sum of Any Subarray	🤔 一般	🕐
1750	Minimum Length of String After Deleting Similar Ends	🤔 一般	🕐
1751	Maximum Number of Events That Can Be Attended II	🤯 困难	🕐
1736	Latest Time by Replacing Hidden Digits	🤩 简单	🕐
1737	Change Minimum Characters to Satisfy One of Three Conditions	🤔 一般	🕐
1738	Find Kth Largest XOR Coordinate Value	🤔 一般	✅
1739	Building Boxes	🤯 困难	🕐
1724	Checking Existence of Edge Length Limited Paths II	🤯 困难	🕐
1743	Restore the Array From Adjacent Pairs	🤔 一般	🕐
1745	Palindrome Partitioning IV	🤯 困难	🕐
1744	Can You Eat Your Favorite Candy on Your Favorite Day?	🤔 一般	🕐
1763	Longest Nice Substring	🤩 简单	🕐
1764	Form Array by Concatenating Subarrays of Another Array	🤔 一般	🕐
1766	Tree of Coprimes	🤯 困难	🕐
1765	Map of Highest Peak	🤔 一般	🕐
1752	Check if Array Is Sorted and Rotated	🤩 简单	🕐
1753	Maximum Score From Removing Stones	🤔 一般	🕐
1754	Largest Merge Of Two Strings	🤔 一般	🕐
1755	Closest Subsequence Sum	🤯 困难	🕐
1740	Find Distance in a Binary Tree	🤔 一般	🕐
1758	Minimum Changes To Make Alternating Binary String	🤩 简单	🕐
1759	Count Number of Homogenous Substrings	🤔 一般	🕐
1760	Minimum Limit of Balls in a Bag	🤔 一般	🕐
1761	Minimum Degree of a Connected Trio in a Graph	🤯 困难	🕐
1779	Find Nearest Point That Has the Same X or Y Coordinate	🤩 简单	🕐
1780	Check if Number is a Sum of Powers of Three	🤔 一般	🕐
1781	Sum of Beauty of All Substrings	🤔 一般	🕐
1782	Count Pairs Of Nodes	🤯 困难	🕐
1746	Maximum Subarray Sum After One Operation	🤔 一般	🕐
1768	Merge Strings Alternately	🤩 简单	🕐
1769	Minimum Number of Operations to Move All Balls to Each Box	🤔 一般	🕐
1770	Maximum Score from Performing Multiplication Operations	🤔 一般	🕐
1771	Maximize Palindrome Length From Subsequences	🤯 困难	🕐
1773	Count Items Matching a Rule	🤩 简单	✅
1774	Closest Dessert Cost	🤔 一般	🕐
1775	Equal Sum Arrays With Minimum Number of Operations	🤔 一般	🕐
1776	Car Fleet II	🤯 困难	🕐
1756	Design Most Recently Used Queue	🤔 一般	🕐
1796	Second Largest Digit in a String	🤩 简单	🕐
1797	Design Authentication Manager	🤔 一般	🕐
1799	Maximize Score After N Operations	🤯 困难	🕐
1803	Count Pairs With XOR in a Range	🤯 困难	🕐
1762	Buildings With an Ocean View	🤔 一般	🕐
1784	Check if Binary String Has at Most One Segment of Ones	🤩 简单	✅
1785	Minimum Elements to Add to Form a Given Sum	🤔 一般	🕐
1786	Number of Restricted Paths From First to Last Node	🤔 一般	🕐
1787	Make the XOR of All Segments Equal to Zero	🤯 困难	🕐
1790	Check if One String Swap Can Make Strings Equal	🤩 简单	🕐
1791	Find Center of Star Graph	🤩 简单	🕐
1792	Maximum Average Pass Ratio	🤔 一般	🕐
1793	Maximum Score of a Good Subarray	🤯 困难	🕐
1772	Sort Features by Popularity	🤔 一般	🕐
1812	Determine Color of a Chessboard Square	🤩 简单	🕐
1813	Sentence Similarity III	🤔 一般	🕐
1815	Maximum Number of Groups Getting Fresh Donuts	🤯 困难	🕐
1814	Count Nice Pairs in an Array	🤔 一般	🕐
1800	Maximum Ascending Subarray Sum	🤩 简单	🕐
1801	Number of Orders in the Backlog	🤔 一般	🕐
1802	Maximum Value at a Given Index in a Bounded Array	🤔 一般	🕐
1798	Maximum Number of Consecutive Values You Can Make	🤔 一般	🕐
1778	Shortest Path in a Hidden Grid	🤔 一般	🕐
1805	Number of Different Integers in a String	🤩 简单	🕐
1807	Evaluate the Bracket Pairs of a String	🤔 一般	🕐
1806	Minimum Number of Operations to Reinitialize a Permutation	🤔 一般	🕐
1808	Maximize Number of Nice Divisors	🤯 困难	🕐
1788	Maximize the Beauty of the Garden	🤯 困难	🕐
1827	Minimum Operations to Make the Array Increasing	🤩 简单	🕐
1828	Queries on Number of Points Inside a Circle	🤔 一般	🕐
1829	Maximum XOR for Each Query	🤔 一般	🕐
1830	Minimum Number of Operations to Make String Sorted	🤯 困难	🕐
1794	Count Pairs of Equal Substrings With Minimum Difference	🤔 一般	🕐
1816	Truncate Sentence	🤩 简单	🕐
1817	Finding the Users Active Minutes	🤔 一般	🕐
1818	Minimum Absolute Sum Difference	🤔 一般	🕐
1819	Number of Different Subsequences GCDs	🤯 困难	🕐
1804	Implement Trie II (Prefix Tree)	🤔 一般	🕐
1822	Sign of the Product of an Array	🤩 简单	🕐
1823	Find the Winner of the Circular Game	🤔 一般	🕐
1824	Minimum Sideway Jumps	🤔 一般	🕐
1825	Finding MK Average	🤯 困难	🕐
1844	Replace All Digits with Characters	🤩 简单	🕐
1845	Seat Reservation Manager	🤔 一般	🕐
1846	Maximum Element After Decreasing and Rearranging	🤔 一般	🕐
1847	Closest Room	🤯 困难	🕐
1810	Minimum Path Cost in a Hidden Grid	🤔 一般	🕐
1832	Check if the Sentence Is Pangram	🤩 简单	🕐
1833	Maximum Ice Cream Bars	🤔 一般	✅
1834	Single-Threaded CPU	🤔 一般	🕐
1835	Find XOR Sum of All Pairs Bitwise AND	🤯 困难	🕐
1837	Sum of Digits in Base K	🤩 简单	🕐
1838	Frequency of the Most Frequent Element	🤔 一般	🕐
1839	Longest Substring Of All Vowels in Order	🤔 一般	🕐
1840	Maximum Building Height	🤯 困难	🕐
1820	Maximum Number of Accepted Invitations	🤔 一般	🕐
1859	Sorting the Sentence	🤩 简单	🕐
1860	Incremental Memory Leak	🤔 一般	🕐
1861	Rotating the Box	🤔 一般	🕐
1848	Minimum Distance to the Target Element	🤩 简单	🕐
1849	Splitting a String Into Descending Consecutive Values	🤔 一般	🕐
1851	Minimum Interval to Include Each Query	🤯 困难	🕐
1850	Minimum Adjacent Swaps to Reach the Kth Smallest Number	🤔 一般	🕐
1989	Maximum Number of People That Can Be Caught in Tag	🤔 一般	🕐
1826	Faulty Sensor	🤩 简单	🕐
1836	Remove Duplicates From an Unsorted Linked List	🤔 一般	🕐
1854	Maximum Population Year	🤩 简单	🕐
1855	Maximum Distance Between a Pair of Values	🤔 一般	🕐
1856	Maximum Subarray Min-Product	🤔 一般	🕐
1857	Largest Color Value in a Directed Graph	🤯 困难	🕐
1876	Substrings of Size Three with Distinct Characters	🤩 简单	🕐
1877	Minimize Maximum Pair Sum in Array	🤔 一般	🕐
1879	Minimum XOR Sum of Two Arrays	🤯 困难	🕐
1878	Get Biggest Three Rhombus Sums in a Grid	🤔 一般	🕐
2046	Sort Linked List Already Sorted Using Absolute Values	🤔 一般	🕐
1863	Sum of All Subset XOR Totals	🤩 简单	🕐
1864	Minimum Number of Swaps to Make the Binary String Alternating	🤔 一般	🕐
1865	Finding Pairs With a Certain Sum	🤔 一般	🕐
1866	Number of Ways to Rearrange Sticks With K Sticks Visible	🤯 困难	🕐
1842	Next Palindrome Using Same Digits	🤯 困难	🕐
1869	Longer Contiguous Segments of Ones than Zeros	🤩 简单	🕐
1870	Minimum Speed to Arrive on Time	🤔 一般	🕐
1871	Jump Game VII	🤔 一般	🕐
1872	Stone Game VIII	🤯 困难	🕐
1852	Distinct Numbers in Each Subarray	🤔 一般	🕐
1893	Check if All the Integers in a Range Are Covered	🤩 简单	🕐
1894	Find the Student that Will Replace the Chalk	🤔 一般	✅
1896	Minimum Cost to Change the Final Value of Expression	🤯 困难	🕐
1858	Longest Word With All Prefixes	🤔 一般	🕐
1880	Check if Word Equals Summation of Two Words	🤩 简单	🕐
1881	Maximum Value after Insertion	🤔 一般	🕐
1882	Process Tasks Using Servers	🤔 一般	🕐
1883	Minimum Skips to Arrive at Meeting On Time	🤯 困难	🕐
1886	Determine Whether Matrix Can Be Obtained By Rotation	🤩 简单	🕐
1887	Reduction Operations to Make the Array Elements Equal	🤔 一般	🕐
1888	Minimum Number of Flips to Make the Binary String Alternating	🤔 一般	🕐
1889	Minimum Space Wasted From Packaging	🤯 困难	🕐
1868	Product of Two Run-Length Encoded Arrays	🤔 一般	🕐
1909	Remove One Element to Make the Array Strictly Increasing	🤩 简单	🕐
1910	Remove All Occurrences of a Substring	🤔 一般	🕐
1911	Maximum Alternating Subsequence Sum	🤔 一般	🕐
1912	Design Movie Rental System	🤯 困难	🕐
1897	Redistribute Characters to Make All Strings Equal	🤩 简单	✅
1899	Merge Triplets to Form Target Triplet	🤔 一般	🕐
1898	Maximum Number of Removable Characters	🤔 一般	🕐
1900	The Earliest and Latest Rounds Where Players Compete	🤯 困难	🕐
1874	Minimize Product Sum of Two Arrays	🤔 一般	🕐
1884	Egg Drop With 2 Eggs and N Floors	🤔 一般	🕐
1903	Largest Odd Number in String	🤩 简单	🕐
1904	The Number of Full Rounds You Have Played	🤔 一般	🕐
1906	Minimum Absolute Difference Queries	🤔 一般	🕐
1905	Count Sub Islands	🤔 一般	🕐
1885	Count Pairs in Two Arrays	🤔 一般	🕐
1925	Count Square Sum Triples	🤩 简单	✅
1926	Nearest Exit from Entrance in Maze	🤔 一般	🕐
1927	Sum Game	🤔 一般	🕐
1928	Minimum Cost to Reach Destination in Time	🤯 困难	✅
1913	Maximum Product Difference Between Two Pairs	🤩 简单	🕐
1914	Cyclically Rotating a Grid	🤔 一般	🕐
1915	Number of Wonderful Substrings	🤔 一般	🕐
1891	Cutting Ribbons	🤔 一般	🕐
1901	Find a Peak Element II	🤔 一般	🕐
1920	Build Array from Permutation	🤩 简单	🕐
1921	Eliminate Maximum Number of Monsters	🤔 一般	🕐
1922	Count Good Numbers	🤔 一般	🕐
1923	Longest Common Subpath	🤯 困难	🕐
1902	Depth of BST Given Insertion Order	🤔 一般	🕐
1941	Check if All Characters Have Equal Number of Occurrences	🤩 简单	🕐
1942	The Number of the Smallest Unoccupied Chair	🤔 一般	🕐
1943	Describe the Painting	🤔 一般	🕐
1929	Concatenation of Array	🤩 简单	🕐
1930	Unique Length-3 Palindromic Subsequences	🤔 一般	🕐
1932	Merge BSTs to Create Single BST	🤯 困难	🕐
1931	Painting a Grid With Three Different Colors	🤯 困难	🕐
1908	Game of Nim	🤔 一般	🕐
1936	Add Minimum Number of Rungs	🤔 一般	🕐
1937	Maximum Number of Points with Cost	🤔 一般	🕐
1938	Maximum Genetic Difference Query	🤯 困难	🕐
1918	Kth Smallest Subarray Sum	🤔 一般	🕐
1933	Check if String Is Decomposable Into Value-Equal Substrings	🤩 简单	🕐
1940	Longest Common Subsequence Between Sorted Arrays	🤔 一般	🕐
1950	Maximum of Minimum Values in All Subarrays	🤔 一般	🕐
1956	Minimum Time For K Virus Variants to Spread	🤯 困难	✅
1924	Erect the Fence II	🤯 困难	🕐
2021	Brightest Position on Street	🤔 一般	🕐
1945	Sum of Digits of String After Convert	🤩 简单	🕐
1946	Largest Number After Mutating Substring	🤔 一般	🕐
1947	Maximum Compatibility Score Sum	🤔 一般	🕐
1948	Delete Duplicate Folders in System	🤯 困难	🕐
1958	Check if Move is Legal	🤔 一般	✅
1959	Minimum Total Space Wasted With K Resizing Operations	🤔 一般	🕐
2052	Minimum Cost to Separate Sentence Into Rows	🤔 一般	🕐
1952	Three Divisors	🤩 简单	🕐
1953	Maximum Number of Weeks for Which You Can Work	🤔 一般	🕐
1968	Array With Elements Not Equal to Average of Neighbors	🤔 一般	🕐
1955	Count Number of Special Subsequences	🤯 困难	🕐
1974	Minimum Time to Type Word Using Special Typewriter	🤩 简单	🕐
1975	Maximum Matrix Sum	🤔 一般	🕐
1976	Number of Ways to Arrive at Destination	🤔 一般	🕐
1977	Number of Ways to Separate Numbers	🤯 困难	🕐
1961	Check If String Is a Prefix of Array	🤩 简单	🕐
1962	Remove Stones to Minimize the Total	🤔 一般	🕐
1963	Minimum Number of Swaps to Make the String Balanced	🤔 一般	🕐
1964	Find the Longest Valid Obstacle Course at Each Position	🤯 困难	🕐
1967	Number of Strings That Appear as Substrings in Word	🤩 简单	🕐
1969	Minimum Non-Zero Product of the Array Elements	🤔 一般	🕐
1970	Last Day Where You Can Still Cross	🤯 困难	🕐
1991	Find the Middle Index in Array	🤩 简单	🕐
1992	Find All Groups of Farmland	🤔 一般	🕐
1993	Operations on Tree	🤔 一般	🕐
1994	The Number of Good Subsets	🤯 困难	🕐
1979	Find Greatest Common Divisor of Array	🤩 简单	🕐
1980	Find Unique Binary String	🤔 一般	🕐
1981	Minimize the Difference Between Target and Chosen Elements	🤔 一般	🕐
1982	Find Array Given Subset Sums	🤯 困难	🕐
1966	Binary Searchable Numbers in an Unsorted Array	🤔 一般	🕐
1984	Minimum Difference Between Highest and Lowest of K Scores	🤩 简单	🕐
1985	Find the Kth Largest Integer in the Array	🤔 一般	🕐
1986	Minimum Number of Work Sessions to Finish the Tasks	🤔 一般	🕐
1987	Number of Unique Good Subsequences	🤯 困难	🕐
2006	Count Number of Pairs With Absolute Difference K	🤩 简单	🕐
2007	Find Original Array From Doubled Array	🤔 一般	🕐
2008	Maximum Earnings From Taxi	🤔 一般	🕐
2009	Minimum Number of Operations to Make Array Continuous	🤯 困难	🕐
1971	Find if Path Exists in Graph	🤩 简单	🕐
1995	Count Special Quadruplets	🤩 简单	🕐
1996	The Number of Weak Characters in the Game	🤔 一般	🕐
1997	First Day Where You Have Been in All the Rooms	🤔 一般	🕐
1998	GCD Sort of an Array	🤯 困难	🕐
1973	Count Nodes Equal to Sum of Descendants	🤔 一般	🕐
2000	Reverse Prefix of Word	🤩 简单	🕐
2001	Number of Pairs of Interchangeable Rectangles	🤔 一般	🕐
2002	Maximum Product of the Length of Two Palindromic Subsequences	🤔 一般	🕐
2003	Smallest Missing Genetic Value in Each Subtree	🤯 困难	✅
2022	Convert 1D Array Into 2D Array	🤩 简单	🕐
2023	Number of Pairs of Strings With Concatenation Equal to Target	🤔 一般	🕐
2024	Maximize the Confusion of an Exam	🤔 一般	🕐
2025	Maximum Number of Ways to Partition an Array	🤯 困难	🕐
2011	Final Value of Variable After Performing Operations	🤩 简单	🕐
2012	Sum of Beauty in the Array	🤔 一般	🕐
2013	Detect Squares	🤔 一般	🕐
2014	Longest Subsequence Repeated k Times	🤯 困难	🕐
1999	Smallest Greater Multiple Made of Two Digits	🤔 一般	🕐
2015	Average Height of Buildings in Each Segment	🤔 一般	🕐
2016	Maximum Difference Between Increasing Elements	🤩 简单	🕐
2017	Grid Game	🤔 一般	🕐
2018	Check if Word Can Be Placed In Crossword	🤔 一般	🕐
2019	The Score of Students Solving Math Expression	🤯 困难	🕐
2037	Minimum Number of Moves to Seat Everyone	🤩 简单	🕐
2038	Remove Colored Pieces if Both Neighbors are the Same Color	🤔 一般	🕐
2040	Kth Smallest Product of Two Sorted Arrays	🤯 困难	🕐
2039	The Time When the Network Becomes Idle	🤔 一般	🕐
2005	Subtree Removal Game with Fibonacci Tree	🤯 困难	🕐
2027	Minimum Moves to Convert String	🤩 简单	🕐
2028	Find Missing Observations	🤔 一般	🕐
2029	Stone Game IX	🤔 一般	🕐
2030	Smallest K-Length Subsequence With Occurrences of a Letter	🤯 困难	🕐
2032	Two Out of Three	🤩 简单	🕐
2033	Minimum Operations to Make a Uni-Value Grid	🤔 一般	🕐
2034	Stock Price Fluctuation	🤔 一般	🕐
2035	Partition Array Into Two Arrays to Minimize Sum Difference	🤯 困难	🕐
2053	Kth Distinct String in an Array	🤩 简单	🕐
2054	Two Best Non-Overlapping Events	🤔 一般	🕐
2055	Plates Between Candles	🤔 一般	🕐
2056	Number of Valid Move Combinations On Chessboard	🤯 困难	🕐
2042	Check if Numbers Are Ascending in a Sentence	🤩 简单	🕐
2043	Simple Bank System	🤔 一般	🕐
2044	Count Number of Maximum Bitwise-OR Subsets	🤔 一般	🕐
2045	Second Minimum Time to Reach Destination	🤯 困难	🕐
2047	Number of Valid Words in a Sentence	🤩 简单	🕐
2048	Next Greater Numerically Balanced Number	🤔 一般	🕐
2049	Count Nodes With the Highest Score	🤔 一般	🕐
2050	Parallel Courses III	🤯 困难	🕐
2068	Check Whether Two Strings are Almost Equivalent	🤩 简单	🕐
2069	Walking Robot Simulation II	🤔 一般	🕐
2070	Most Beautiful Item for Each Query	🤔 一般	🕐
2071	Maximum Number of Tasks You Can Assign	🤯 困难	🕐
2057	Smallest Index With Equal Value	🤩 简单	🕐
2058	Find the Minimum and Maximum Number of Nodes Between Critical Points	🤔 一般	🕐
2059	Minimum Operations to Convert Number	🤔 一般	🕐
2060	Check if an Original String Exists Given Two Encoded Strings	🤯 困难	🕐
2062	Count Vowel Substrings of a String	🤩 简单	🕐
2063	Vowels of All Substrings	🤔 一般	🕐
2064	Minimized Maximum of Products Distributed to Any Store	🤔 一般	🕐
2065	Maximum Path Quality of a Graph	🤯 困难	🕐
2085	Count Common Words With One Occurrence	🤩 简单	🕐
2086	Minimum Number of Buckets Required to Collect Rainwater from Houses	🤔 一般	🕐
2087	Minimum Cost Homecoming of a Robot in a Grid	🤔 一般	🕐
2088	Count Fertile Pyramids in a Land	🤯 困难	🕐
2073	Time Needed to Buy Tickets	🤩 简单	🕐
2074	Reverse Nodes in Even Length Groups	🤔 一般	🕐
2075	Decode the Slanted Ciphertext	🤔 一般	🕐
2076	Process Restricted Friend Requests	🤯 困难	🕐
2078	Two Furthest Houses With Different Colors	🤩 简单	🕐
2132	Stamping the Grid	🤯 困难	🕐
2097	Valid Arrangement of Pairs	🤯 困难	🕐
2081	Sum of k-Mirror Numbers	🤯 困难	🕐
2061	Number of Spaces Cleaning Robot Cleaned	🤔 一般	🕐
2099	Find Subsequence of Length K With the Largest Sum	🤩 简单	🕐
2100	Find Good Days to Rob the Bank	🤔 一般	🕐
2101	Detonate the Maximum Bombs	🤔 一般	🕐
2102	Sequentially Ordinal Rank Tracker	🤯 困难	🕐
2067	Number of Equal Count Substrings	🤔 一般	🕐
2089	Find Target Indices After Sorting Array	🤩 简单	🕐
2090	K Radius Subarray Averages	🤔 一般	🕐
2091	Removing Minimum and Maximum From Array	🤔 一般	🕐
2092	Find All People With Secret	🤯 困难	🕐
2094	Finding 3-Digit Even Numbers	🤩 简单	✅
2095	Delete the Middle Node of a Linked List	🤔 一般	🕐
2096	Step-By-Step Directions From a Binary Tree Node to Another	🤔 一般	🕐
2077	Paths in Maze That Lead to Same Room	🤔 一般	🕐
2114	Maximum Number of Words Found in Sentences	🤩 简单	🕐
2115	Find All Possible Recipes from Given Supplies	🤔 一般	🕐
2116	Check if a Parentheses String Can Be Valid	🤔 一般	🕐
2117	Abbreviating the Product of a Range	🤯 困难	🕐
2083	Substrings That Begin and End With the Same Letter	🤔 一般	🕐
2103	Rings and Rods	🤩 简单	🕐
2104	Sum of Subarray Ranges	🤔 一般	🕐
2105	Watering Plants II	🤔 一般	🕐
2106	Maximum Fruits Harvested After at Most K Steps	🤯 困难	🕐
2093	Minimum Cost to Reach City With Discounts	🤔 一般	🕐
2108	Find First Palindromic String in the Array	🤩 简单	🕐
2109	Adding Spaces to a String	🤔 一般	🕐
2110	Number of Smooth Descent Periods of a Stock	🤔 一般	🕐
2111	Minimum Operations to Make the Array K-Increasing	🤯 困难	🕐
2129	Capitalize the Title	🤩 简单	🕐
2130	Maximum Twin Sum of a Linked List	🤔 一般	✅
2131	Longest Palindrome by Concatenating Two Letter Words	🤔 一般	🕐
2119	A Number After a Double Reversal	🤩 简单	🕐
2120	Execution of All Suffix Instructions Staying in a Grid	🤔 一般	🕐
2121	Intervals Between Identical Elements	🤔 一般	🕐
2122	Recover the Original Array	🤯 困难	🕐
2098	Subsequence of Size K With the Largest Even Sum	🤔 一般	🕐
2124	Check if All A's Appears Before All B's	🤩 简单	🕐
2125	Number of Laser Beams in a Bank	🤔 一般	🕐
2126	Destroying Asteroids	🤔 一般	🕐
2127	Maximum Employees to Be Invited to a Meeting	🤯 困难	🕐
2107	Number of Unique Flavors After Sharing K Candies	🤔 一般	🕐
2133	Check if Every Row and Column Contains All Numbers	🤩 简单	🕐
2134	Minimum Swaps to Group All 1's Together II	🤔 一般	🕐
2135	Count Words Obtained After Adding a Letter	🤔 一般	🕐
2136	Earliest Possible Day of Full Bloom	🤯 困难	🕐
2113	Elements in Array After Removing and Replacing Elements	🤔 一般	🕐
2123	Minimum Operations to Remove Adjacent Ones in Matrix	🤯 困难	🕐
2138	Divide a String Into Groups of Size k	🤩 简单	🕐
2140	Solving Questions With Brainpower	🤔 一般	🕐
2141	Maximum Running Time of N Computers	🤯 困难	🕐
2128	Remove All Ones With Row and Column Flips	🤔 一般	🕐
2137	Pour Water Between Buckets to Make Water Levels Equal	🤔 一般	🕐
LCP 02	Deep Dark Fraction	🤩 简单	🕐
LCP 04	Broken Board Dominoes	🤯 困难	🕐
LCP 05	Coin Bonus	🤯 困难	🕐
LCP 03	Programmable Robot	🤔 一般	🕐
LCP 01	Guess Numbers	🤩 简单	🕐
LCP 06	拿硬币	🤩 简单	🕐
LCP 08	剧情触发时间	🤔 一般	🕐
LCP 23	魔术排列	🤔 一般	🕐
LCP 14	切分数组	🤯 困难	🕐
LCP 10	二叉树任务调度	🤯 困难	🕐
LCP 07	传递信息	🤩 简单	🕐
LCP 16	游乐园的游览计划	🤯 困难	🕐
LCP 11	期望个数统计	🤩 简单	🕐
LCP 12	小张刷题计划	🤔 一般	🕐
LCP 15	游乐园的迷宫	🤯 困难	🕐
LCP 34	二叉树染色	🤔 一般	🕐
LCP 09	最小跳跃次数	🤯 困难	🕐
LCP 37	最小矩形面积	🤯 困难	🕐
LCP 13	寻宝	🤯 困难	🕐
LCP 19	秋叶收藏集	🤔 一般	🕐
LCP 24	数字游戏	🤯 困难	🕐
LCP 26	导航装置	🤯 困难	🕐
LCP 20	快速公交	🤯 困难	🕐
LCP 21	追逐游戏	🤯 困难	🕐
LCP 25	古董键盘	🤯 困难	✅
LCP 17	速算机器人	🤩 简单	🕐
LCP 22	黑白方格画	🤩 简单	🕐
LCP 18	早餐组合	🤩 简单	🕐
LCP 27	黑盒光线反射	🤯 困难	🕐
LCP 28	采购方案	🤩 简单	🕐
LCP 29	乐团站位	🤩 简单	🕐
LCP 31	变换的迷宫	🤯 困难	🕐
LCP 32	批量处理任务	🤯 困难	🕐
LCP 35	电动车游城市	🤯 困难	🕐
LCP 33	蓄水	🤩 简单	🕐
LCP 36	最多牌组数	🤯 困难	🕐
LCP 38	守卫城堡	🤯 困难	🕐
LCP 30	魔塔游戏	🤔 一般	🕐
LCS 01	下载插件	🤩 简单	🕐
LCS 02	完成一半题目	🤩 简单	🕐
LCS 03	主题空间	🤔 一般	🕐
LCP 49	环形闯关游戏	🤯 困难	🕐
LCP 47	入场安检	🤯 困难	🕐
LCP 44	开幕式焰火	🤩 简单	🕐
LCP 43	十字路口的交通	🤯 困难	🕐
LCP 40	心算挑战	🤩 简单	🕐
LCP 39	无人机方阵	🤩 简单	🕐
LCP 41	黑白翻转棋	🤔 一般	🕐
LCP 42	玩具套圈	🤯 困难	🕐
LCP 46	志愿者调配	🤔 一般	🕐
LCP 48	无限棋局	🤯 困难	🕐
LCP 45	自行车炫技赛场	🤔 一般	🕐
175	Combine Two Tables	🤩 简单	🕐
176	Second Highest Salary	🤔 一般	🕐
177	Nth Highest Salary	🤔 一般	🕐
178	Rank Scores	🤔 一般	🕐
180	Consecutive Numbers	🤔 一般	🕐
181	Employees Earning More Than Their Managers	🤩 简单	🕐
182	Duplicate Emails	🤩 简单	🕐
183	Customers Who Never Order	🤩 简单	🕐
184	Department Highest Salary	🤔 一般	🕐
185	Department Top Three Salaries	🤯 困难	🕐
196	Delete Duplicate Emails	🤩 简单	🕐
197	Rising Temperature	🤩 简单	🕐
262	Trips and Users	🤯 困难	🕐
569	Median Employee Salary	🤯 困难	🕐
570	Managers with at Least 5 Direct Reports	🤔 一般	🕐
571	Find Median Given Frequency of Numbers	🤯 困难	🕐
574	Winning Candidate	🤔 一般	🕐
577	Employee Bonus	🤩 简单	🕐
578	Get Highest Answer Rate Question	🤔 一般	🕐
579	Find Cumulative Salary of an Employee	🤯 困难	🕐
580	Count Student Number in Departments	🤔 一般	🕐
584	Find Customer Referee	🤩 简单	🕐
585	Investments in 2016	🤔 一般	🕐
586	Customer Placing the Largest Number of Orders	🤩 简单	🕐
595	Big Countries	🤩 简单	🕐
596	Classes More Than 5 Students	🤩 简单	🕐
597	Friend Requests I: Overall Acceptance Rate	🤩 简单	🕐
601	Human Traffic of Stadium	🤯 困难	🕐
602	Friend Requests II: Who Has the Most Friends	🤔 一般	🕐
603	Consecutive Available Seats	🤩 简单	🕐
607	Sales Person	🤩 简单	🕐
608	Tree Node	🤔 一般	✅
610	Triangle Judgement	🤩 简单	🕐
612	Shortest Distance in a Plane	🤔 一般	🕐
613	Shortest Distance in a Line	🤩 简单	🕐
614	Second Degree Follower	🤔 一般	✅
615	Average Salary: Departments VS Company	🤯 困难	🕐
618	Students Report By Geography	🤯 困难	🕐
619	Biggest Single Number	🤩 简单	🕐
620	Not Boring Movies	🤩 简单	🕐
626	Exchange Seats	🤔 一般	🕐
627	Swap Salary	🤩 简单	🕐
1045	Customers Who Bought All Products	🤔 一般	✅
1050	Actors and Directors Who Cooperated At Least Three Times	🤩 简单	🕐
1068	Product Sales Analysis I	🤩 简单	🕐
1069	Product Sales Analysis II	🤩 简单	🕐
1070	Product Sales Analysis III	🤔 一般	🕐
1075	Project Employees I	🤩 简单	✅
1076	Project Employees II	🤩 简单	🕐
1077	Project Employees III	🤔 一般	🕐
1082	Sales Analysis I	🤩 简单	🕐
1083	Sales Analysis II	🤩 简单	🕐
1084	Sales Analysis III	🤩 简单	🕐
511	Game Play Analysis I	🤩 简单	🕐
512	Game Play Analysis II	🤩 简单	🕐
534	Game Play Analysis III	🤔 一般	🕐
550	Game Play Analysis IV	🤔 一般	🕐
1097	Game Play Analysis V	🤯 困难	🕐
1098	Unpopular Books	🤔 一般	🕐
1107	New Users Daily Count	🤔 一般	🕐
1112	Highest Grade For Each Student	🤔 一般	🕐
1113	Reported Posts	🤩 简单	🕐
1126	Active Businesses	🤔 一般	🕐
1127	User Purchase Platform	🤯 困难	🕐
1132	Reported Posts II	🤔 一般	🕐
1141	User Activity for the Past 30 Days I	🤩 简单	🕐
1142	User Activity for the Past 30 Days II	🤩 简单	🕐
1148	Article Views I	🤩 简单	🕐
1149	Article Views II	🤔 一般	🕐
1158	Market Analysis I	🤔 一般	🕐
1159	Market Analysis II	🤯 困难	🕐
1164	Product Price at a Given Date	🤔 一般	🕐
1173	Immediate Food Delivery I	🤩 简单	🕐
1174	Immediate Food Delivery II	🤔 一般	🕐
1179	Reformat Department Table	🤩 简单	🕐
1193	Monthly Transactions I	🤔 一般	✅
1194	Tournament Winners	🤯 困难	🕐
1204	Last Person to Fit in the Bus	🤔 一般	🕐
1205	Monthly Transactions II	🤔 一般	🕐
1211	Queries Quality and Percentage	🤩 简单	🕐
1212	Team Scores in Football Tournament	🤔 一般	🕐
1225	Report Contiguous Dates	🤯 困难	🕐
1241	Number of Comments per Post	🤩 简单	🕐
1251	Average Selling Price	🤩 简单	🕐
1264	Page Recommendations	🤔 一般	🕐
1270	All People Report to the Given Manager	🤔 一般	🕐
1280	Students and Examinations	🤩 简单	🕐
1285	Find the Start and End Number of Continuous Ranges	🤔 一般	🕐
1294	Weather Type in Each Country	🤩 简单	🕐
1303	Find the Team Size	🤩 简单	🕐
1308	Running Total for Different Genders	🤔 一般	🕐
1321	Restaurant Growth	🤔 一般	🕐
1322	Ads Performance	🤩 简单	🆖
1327	List the Products Ordered in a Period	🤩 简单	🕐
1336	Number of Transactions per Visit	🤯 困难	🕐
1341	Movie Rating	🤔 一般	🕐
1350	Students With Invalid Departments	🤩 简单	🕐
1355	Activity Participants	🤔 一般	🕐
1364	Number of Trusted Contacts of a Customer	🤔 一般	🕐
1369	Get the Second Most Recent Activity	🤯 困难	🕐
1378	Replace Employee ID With The Unique Identifier	🤩 简单	🕐
1384	Total Sales Amount by Year	🤯 困难	🕐
1393	Capital Gain/Loss	🤔 一般	🕐
1398	Customers Who Bought Products A and B but Not C	🤔 一般	🕐
1407	Top Travellers	🤩 简单	🕐
1412	Find the Quiet Students in All Exams	🤯 困难	🕐
1421	NPV Queries	🤩 简单	🕐
1435	Create a Session Bar Chart	🤩 简单	🕐
1440	Evaluate Boolean Expression	🤔 一般	🕐
1445	Apples & Oranges	🤔 一般	🕐
1454	Active Users	🤔 一般	🕐
1459	Rectangles Area	🤔 一般	🕐
1468	Calculate Salaries	🤔 一般	🕐
1479	Sales by Day of the Week	🤯 困难	🕐
1484	Group Sold Products By The Date	🤩 简单	🕐
1495	Friendly Movies Streamed Last Month	🤩 简单	🕐
1501	Countries You Can Safely Invest In	🤔 一般	🕐
1511	Customer Order Frequency	🤩 简单	🕐
1517	Find Users With Valid E-Mails	🤩 简单	🕐
1527	Patients With a Condition	🤩 简单	🕐
1532	The Most Recent Three Orders	🤔 一般	🕐
1543	Fix Product Name Format	🤩 简单	🕐
1549	The Most Recent Orders for Each Product	🤔 一般	🕐
1555	Bank Account Summary	🤔 一般	🕐
1565	Unique Orders and Customers Per Month	🤩 简单	🕐
1571	Warehouse Manager	🤩 简单	🕐
1581	Customer Who Visited but Did Not Make Any Transactions	🤩 简单	🕐
1587	Bank Account Summary II	🤩 简单	🕐
1596	The Most Frequently Ordered Products for Each Customer	🤔 一般	🕐
1607	Sellers With No Sales	🤩 简单	🕐
1613	Find the Missing IDs	🤔 一般	🕐
1623	All Valid Triplets That Can Represent a Country	🤩 简单	🕐
1633	Percentage of Users Attended a Contest	🤩 简单	🕐
1635	Hopper Company Queries I	🤯 困难	🕐
1645	Hopper Company Queries II	🤯 困难	🕐
1651	Hopper Company Queries III	🤯 困难	🕐
1661	Average Time of Process per Machine	🤩 简单	🕐
1667	Fix Names in a Table	🤩 简单	🕐
1677	Product's Worth Over Invoices	🤩 简单	🕐
1683	Invalid Tweets	🤩 简单	🕐
1693	Daily Leads and Partners	🤩 简单	🕐
1699	Number of Calls Between Two Persons	🤔 一般	🕐
1709	Biggest Window Between Visits	🤔 一般	🕐
1715	Count Apples and Oranges	🤔 一般	🕐
1729	Find Followers Count	🤩 简单	🕐
1731	The Number of Employees Which Report to Each Employee	🤩 简单	🕐
1741	Find Total Time Spent by Each Employee	🤩 简单	🕐
1747	Leetflex Banned Accounts	🤔 一般	🕐
1757	Recyclable and Low Fat Products	🤩 简单	🕐
1767	Find the Subtasks That Did Not Execute	🤯 困难	🕐
1777	Product's Price for Each Store	🤩 简单	🕐
1783	Grand Slam Titles	🤔 一般	🕐
1789	Primary Department for Each Employee	🤩 简单	🕐
1795	Rearrange Products Table	🤩 简单	🕐
1809	Ad-Free Sessions	🤩 简单	🕐
1811	Find Interview Candidates	🤔 一般	🕐
1821	Find Customers With Positive Revenue this Year	🤩 简单	🕐
1831	Maximum Transaction Each Day	🤔 一般	🕐
1841	League Statistics	🤔 一般	🕐
1843	Suspicious Bank Accounts	🤔 一般	🕐
1853	Convert Date Format	🤩 简单	🕐
1867	Orders With Maximum Quantity Above Average	🤔 一般	🕐
1873	Calculate Special Bonus	🤩 简单	🕐
1875	Group Employees of the Same Salary	🤔 一般	🕐
1890	The Latest Login in 2020	🤩 简单	🕐
1892	Page Recommendations II	🤯 困难	🕐
1907	Count Salary Categories	🤔 一般	🕐
1917	Leetcodify Friends Recommendations	🤯 困难	🕐
1919	Leetcodify Similar Friends	🤯 困难	🕐
1934	Confirmation Rate	🤔 一般	🕐
1939	Users That Actively Request Confirmation Messages	🤩 简单	🕐
1949	Strong Friendship	🤔 一般	🕐
1951	All the Pairs With the Maximum Number of Common Followers	🤔 一般	🕐
1965	Employees With Missing Information	🤩 简单	🕐
1972	First and Last Call On the Same Day	🤯 困难	🕐
1978	Employees Whose Manager Left the Company	🤩 简单	🕐
1988	Find Cutoff Score for Each School	🤔 一般	🕐
1990	Count the Number of Experiments	🤩 简单	🕐
2004	The Number of Seniors and Juniors to Join the Company	🤯 困难	🕐
2010	The Number of Seniors and Juniors to Join the Company II	🤯 困难	🕐
2020	Number of Accounts That Did Not Stream	🤔 一般	🕐
2026	Low-Quality Problems	🤩 简单	🕐
2041	Accepted Candidates From the Interviews	🤔 一般	🕐
2051	The Category of Each Member in the Store	🤔 一般	🕐
2066	Account Balance	🤔 一般	🕐
2072	The Winner University	🤩 简单	🕐
2082	The Number of Rich Customers	🤩 简单	🕐
2084	Drop Type 1 Orders for Customers With Type 0 Orders	🤔 一般	🕐
2112	The Airport With the Most Traffic	🤔 一般	🕐
2118	Build the Equation	🤯 困难	🕐
2142	The Number of Passengers in Each Bus I	🤔 一般	🕐
192	Word Frequency	🤔 一般	🕐
193	Valid Phone Numbers	🤩 简单	🕐
194	Transpose File	🤔 一般	🕐
195	Tenth Line	🤩 简单	🕐
1117	Building H2O	🤔 一般	🕐
1115	Print FooBar Alternately	🤔 一般	🕐
1114	Print in Order	🤩 简单	🕐
1188	Design Bounded Blocking Queue	🤔 一般	🕐
1116	Print Zero Even Odd	🤔 一般	🕐
1195	Fizz Buzz Multithreaded	🤔 一般	🕐
1226	The Dining Philosophers	🤔 一般	🕐
1242	Web Crawler Multithreaded	🤔 一般	🕐
1279	Traffic Light Controlled Intersection	🤩 简单	🕐
面试题 01.01	Is Unique LCCI	🤩 简单	🕐
面试题 01.02	Check Permutation LCCI	🤩 简单	🕐
面试题 01.03	String to URL LCCI	🤩 简单	🕐
面试题 01.06	Compress String LCCI	🤩 简单	🕐
面试题 01.09	String Rotation LCCI	🤩 简单	🕐
面试题 02.01	Remove Duplicate Node LCCI	🤩 简单	🕐
面试题 02.06	Palindrome Linked List LCCI	🤩 简单	🕐
面试题 02.07	Intersection of Two Linked Lists LCCI	🤩 简单	🕐
面试题 02.08	Linked List Cycle LCCI	🤔 一般	🕐
面试题 03.02	Min Stack LCCI	🤩 简单	🕐
面试题 03.04	Implement Queue using Stacks LCCI	🤩 简单	🕐
面试题 04.01	Route Between Nodes LCCI	🤔 一般	🕐
面试题 03.01	Three in One LCCI	🤩 简单	🕐
面试题 03.05	Sort of Stacks LCCI	🤔 一般	🕐
面试题 04.02	Minimum Height Tree LCCI	🤩 简单	🕐
面试题 04.03	List of Depth LCCI	🤔 一般	🕐
面试题 04.04	Check Balance LCCI	🤩 简单	🕐
面试题 04.05	Legal Binary Search Tree LCCI	🤔 一般	🕐
面试题 04.06	Successor LCCI	🤔 一般	🕐
面试题 04.08	First Common Ancestor LCCI	🤔 一般	🕐
面试题 05.01	Insert Into Bits LCCI	🤩 简单	🕐
面试题 05.06	Convert Integer LCCI	🤩 简单	🕐
面试题 05.07	Exchange LCCI	🤩 简单	🕐
面试题 05.04	Closed Number LCCI	🤔 一般	🕐
面试题 01.04	Palindrome Permutation LCCI	🤩 简单	🕐
面试题 01.07	Rotate Matrix LCCI	🤔 一般	🕐
面试题 01.08	Zero Matrix LCCI	🤔 一般	🕐
面试题 02.03	Delete Middle Node LCCI	🤩 简单	🕐
面试题 02.05	Sum Lists LCCI	🤔 一般	🕐
面试题 03.03	Stack of Plates LCCI	🤔 一般	🕐
面试题 05.08	Draw Line LCCI	🤔 一般	🕐
面试题 08.01	Three Steps Problem LCCI	🤩 简单	🕐
面试题 08.04	Power Set LCCI	🤔 一般	🕐
面试题 08.05	Recursive Mulitply LCCI	🤔 一般	🕐
面试题 08.09	Bracket LCCI	🤔 一般	🕐
面试题 08.10	Color Fill LCCI	🤩 简单	🕐
面试题 08.13	Pile Box LCCI	🤯 困难	🕐
面试题 05.02	Binary Number to String LCCI	🤔 一般	🕐
面试题 03.06	Animal Shelter LCCI	🤩 简单	🕐
面试题 04.10	Check SubTree LCCI	🤔 一般	🕐
面试题 05.03	Reverse Bits LCCI	🤩 简单	🕐
面试题 08.11	Coin LCCI	🤔 一般	🕐
面试题 10.03	Search Rotate Array LCCI	🤔 一般	🕐
面试题 08.12	Eight Queens LCCI	🤯 困难	🕐
面试题 08.03	Magic Index LCCI	🤩 简单	🕐
面试题 08.07	Permutation I LCCI	🤔 一般	🕐
面试题 10.05	Sparse Array Search LCCI	🤩 简单	🕐
面试题 16.01	Swap Numbers LCCI	🤔 一般	🕐
面试题 16.02	Words Frequency LCCI	🤔 一般	🕐
面试题 16.03	Intersection LCCI	🤯 困难	🕐
面试题 16.04	Tic-Tac-Toe LCCI	🤔 一般	🕐
面试题 16.06	Smallest Difference LCCI	🤔 一般	🕐
面试题 08.08	Permutation II LCCI	🤔 一般	🕐
面试题 16.07	Maximum LCCI	🤩 简单	🕐
面试题 16.09	Operations LCCI	🤔 一般	🕐
面试题 16.10	Living People LCCI	🤔 一般	🕐
面试题 16.11	Diving Board LCCI	🤩 简单	🕐
面试题 16.13	Bisect Squares LCCI	🤔 一般	🕐
面试题 16.14	Best Line LCCI	🤔 一般	🕐
面试题 16.15	Master Mind LCCI	🤩 简单	🕐
面试题 16.16	Sub Sort LCCI	🤔 一般	🕐
面试题 16.17	Contiguous Sequence LCCI	🤩 简单	🕐
面试题 16.18	Pattern Matching LCCI	🤔 一般	🕐
面试题 16.19	Pond Sizes LCCI	🤔 一般	🕐
面试题 01.05	One Away LCCI	🤔 一般	🕐
面试题 02.02	Kth Node From End of List LCCI	🤩 简单	🕐
面试题 02.04	Partition List LCCI	🤔 一般	🕐
面试题 04.12	Paths with Sum LCCI	🤔 一般	🕐
面试题 04.09	BST Sequences LCCI	🤯 困难	🕐
面试题 08.02	Robot in a Grid LCCI	🤔 一般	🕐
面试题 10.01	Sorted Merge LCCI	🤩 简单	🕐
面试题 10.11	Peaks and Valleys LCCI	🤔 一般	🕐
面试题 08.06	Hanota LCCI	🤩 简单	🕐
面试题 10.09	Sorted Matrix Search LCCI	🤔 一般	🕐
面试题 16.05	Factorial Zeros LCCI	🤩 简单	🕐
面试题 16.08	English Int LCCI	🤯 困难	🕐
面试题 17.12	BiNode LCCI	🤩 简单	🕐
面试题 17.13	Re-Space LCCI	🤔 一般	🕐
面试题 17.14	Smallest K LCCI	🤔 一般	✅
面试题 17.15	Longest Word LCCI	🤔 一般	🕐
面试题 17.16	The Masseuse LCCI	🤩 简单	🕐
面试题 17.17	Multi Search LCCI	🤔 一般	🕐
面试题 17.01	Add Without Plus LCCI	🤩 简单	🕐
面试题 16.25	LRU Cache LCCI	🤔 一般	🕐
面试题 16.26	Calculator LCCI	🤔 一般	🕐
面试题 17.20	Continuous Median LCCI	🤯 困难	🕐
面试题 17.21	Volume of Histogram LCCI	🤯 困难	🕐
面试题 17.22	Word Transformer LCCI	🤔 一般	🕐
面试题 08.14	Boolean Evaluation LCCI	🤔 一般	🕐
面试题 17.04	Missing Number LCCI	🤩 简单	🕐
面试题 17.05	Find Longest Subarray LCCI	🤔 一般	🕐
面试题 17.06	Number Of 2s In Range LCCI	🤯 困难	🕐
面试题 17.07	Baby Names LCCI	🤔 一般	🕐
面试题 17.08	Circus Tower LCCI	🤔 一般	🕐
面试题 17.09	Get Kth Magic Number LCCI	🤔 一般	🕐
面试题 17.10	Find Majority Element LCCI	🤩 简单	🕐
面试题 17.11	Find Closest LCCI	🤔 一般	🕐
面试题 10.02	Group Anagrams LCCI	🤔 一般	🕐
面试题 10.10	Rank from Stream LCCI	🤔 一般	🕐
面试题 16.24	Pairs With Sum LCCI	🤔 一般	🕐
面试题 17.18	Shortest Supersequence LCCI	🤔 一般	🕐
面试题 17.19	Missing Two LCCI	🤯 困难	🕐
面试题 17.23	Max Black Square LCCI	🤔 一般	🕐
面试题 17.24	Max Submatrix LCCI	🤯 困难	🕐
面试题 16.20	T9 LCCI	🤔 一般	🕐
面试题 16.21	Sum Swap LCCI	🤔 一般	🕐
面试题 17.25	Word Rectangle LCCI	🤯 困难	🕐
面试题 16.22	Langtons Ant LCCI	🤔 一般	🕐
面试题 17.26	Sparse Similarity LCCI	🤯 困难	🕐
剑指 Offer 09	用两个栈实现队列 LCOF	🤩 简单	✅
剑指 Offer 10- I	斐波那契数列 LCOF	🤩 简单	🕐
剑指 Offer 03	数组中重复的数字 LCOF	🤩 简单	🕐
剑指 Offer 04	二维数组中的查找 LCOF	🤔 一般	🕐
剑指 Offer 10- II	青蛙跳台阶问题 LCOF	🤩 简单	🕐
剑指 Offer 11	旋转数组的最小数字 LCOF	🤩 简单	🕐
剑指 Offer 12	矩阵中的路径 LCOF	🤔 一般	🕐
剑指 Offer 05	替换空格 LCOF	🤩 简单	✅
剑指 Offer 13	机器人的运动范围 LCOF	🤔 一般	🕐
剑指 Offer 06	从尾到头打印链表 LCOF	🤩 简单	✅
剑指 Offer 07	重建二叉树 LCOF	🤔 一般	🕐
剑指 Offer 14- I	剪绳子 LCOF	🤔 一般	🕐
剑指 Offer 14- II	剪绳子 II LCOF	🤔 一般	🕐
剑指 Offer 25	合并两个排序的链表 LCOF	🤩 简单	🕐
剑指 Offer 26	树的子结构 LCOF	🤔 一般	🕐
剑指 Offer 27	二叉树的镜像 LCOF	🤩 简单	🕐
剑指 Offer 28	对称的二叉树 LCOF	🤩 简单	🕐
剑指 Offer 20	表示数值的字符串 LCOF	🤔 一般	🕐
剑指 Offer 21	调整数组顺序使奇数位于偶数前面 LCOF	🤩 简单	🕐
剑指 Offer 15	二进制中1的个数 LCOF	🤩 简单	🕐
剑指 Offer 29	顺时针打印矩阵 LCOF	🤩 简单	🕐
剑指 Offer 22	链表中倒数第k个节点 LCOF	🤩 简单	✅
剑指 Offer 16	数值的整数次方 LCOF	🤔 一般	🕐
剑指 Offer 17	打印从1到最大的n位数 LCOF	🤩 简单	🕐
剑指 Offer 19	正则表达式匹配 LCOF	🤯 困难	🕐
剑指 Offer 24	反转链表 LCOF	🤩 简单	🕐
剑指 Offer 18	删除链表的节点 LCOF	🤩 简单	🕐
剑指 Offer 35	复杂链表的复制 LCOF	🤔 一般	🕐
剑指 Offer 40	最小的k个数 LCOF	🤩 简单	🕐
剑指 Offer 30	包含min函数的栈 LCOF	🤩 简单	✅
剑指 Offer 41	数据流中的中位数 LCOF	🤯 困难	🕐
剑指 Offer 42	连续子数组的最大和 LCOF	🤩 简单	🕐
剑指 Offer 36	二叉搜索树与双向链表 LCOF	🤔 一般	🕐
剑指 Offer 31	栈的压入、弹出序列 LCOF	🤔 一般	🕐
剑指 Offer 37	序列化二叉树 LCOF	🤯 困难	🕐
剑指 Offer 38	字符串的排列 LCOF	🤔 一般	🕐
剑指 Offer 43	1～n整数中1出现的次数 LCOF	🤯 困难	🕐
剑指 Offer 39	数组中出现次数超过一半的数字 LCOF	🤩 简单	🕐
剑指 Offer 32 - I	从上到下打印二叉树 LCOF	🤔 一般	🕐
剑指 Offer 32 - II	从上到下打印二叉树 II LCOF	🤩 简单	🕐
剑指 Offer 44	数字序列中某一位的数字 LCOF	🤔 一般	🕐
剑指 Offer 32 - III	从上到下打印二叉树 III LCOF	🤔 一般	🕐
剑指 Offer 33	二叉搜索树的后序遍历序列 LCOF	🤔 一般	🕐
剑指 Offer 50	第一个只出现一次的字符 LCOF	🤩 简单	🕐
剑指 Offer 34	二叉树中和为某一值的路径 LCOF	🤔 一般	🕐
剑指 Offer 51	数组中的逆序对 LCOF	🤯 困难	🕐
剑指 Offer 55 - I	二叉树的深度 LCOF	🤩 简单	🕐
剑指 Offer 56 - I	数组中数字出现的次数 LCOF	🤔 一般	🕐
剑指 Offer 56 - II	数组中数字出现的次数 II LCOF	🤔 一般	🕐
剑指 Offer 57	和为s的两个数字 LCOF	🤩 简单	🕐
剑指 Offer 45	把数组排成最小的数 LCOF	🤔 一般	🕐
剑指 Offer 57 - II	和为s的连续正数序列 LCOF	🤩 简单	🕐
剑指 Offer 46	把数字翻译成字符串 LCOF	🤔 一般	🕐
剑指 Offer 52	两个链表的第一个公共节点 LCOF	🤩 简单	🕐
剑指 Offer 47	礼物的最大价值 LCOF	🤔 一般	🕐
剑指 Offer 58 - I	翻转单词顺序 LCOF	🤩 简单	🕐
剑指 Offer 53 - I	在排序数组中查找数字 LCOF	🤩 简单	🕐
剑指 Offer 58 - II	左旋转字符串 LCOF	🤩 简单	✅
剑指 Offer 53 - II	缺失的数字 LCOF	🤩 简单	🕐
剑指 Offer 48	最长不含重复字符的子字符串 LCOF	🤔 一般	🕐
剑指 Offer 54	二叉搜索树的第k大节点 LCOF	🤩 简单	🕐
剑指 Offer 49	丑数 LCOF	🤔 一般	🕐
剑指 Offer 65	不用加减乘除做加法 LCOF	🤩 简单	🕐
剑指 Offer 59 - I	滑动窗口的最大值 LCOF	🤯 困难	🕐
剑指 Offer 59 - II	队列的最大值 LCOF	🤔 一般	🕐
剑指 Offer 66	构建乘积数组 LCOF	🤔 一般	🕐
剑指 Offer 60	n个骰子的点数 LCOF	🤔 一般	🕐
剑指 Offer 67	把字符串转换成整数 LCOF	🤔 一般	🕐
剑指 Offer 61	扑克牌中的顺子 LCOF	🤩 简单	🕐
剑指 Offer 55 - II	平衡二叉树 LCOF	🤩 简单	🕐
剑指 Offer 62	圆圈中最后剩下的数字 LCOF	🤩 简单	🕐
剑指 Offer 63	股票的最大利润 LCOF	🤔 一般	🕐
剑指 Offer 64	求1+2+…+n LCOF	🤔 一般	🕐
剑指 Offer 68 - I	二叉搜索树的最近公共祖先 LCOF	🤩 简单	🕐
剑指 Offer 68 - II	二叉树的最近公共祖先 LCOF	🤩 简单	🕐
剑指 Offer II 001	整数除法	🤩 简单	🕐
剑指 Offer II 081	允许重复选择元素的组合	🤔 一般	🕐
剑指 Offer II 003	前 n 个数字二进制中 1 的个数	🤩 简单	🕐
剑指 Offer II 002	二进制加法	🤩 简单	🕐
剑指 Offer II 082	含有重复元素集合的组合	🤔 一般	🕐
剑指 Offer II 004	只出现一次的数字	🤔 一般	🕐
剑指 Offer II 083	没有重复元素集合的全排列	🤔 一般	🕐
剑指 Offer II 084	含有重复元素集合的全排列	🤔 一般	✅
剑指 Offer II 005	单词长度的最大乘积	🤔 一般	🕐
剑指 Offer II 006	排序数组中两个数字之和	🤩 简单	🕐
剑指 Offer II 085	生成匹配的括号	🤔 一般	🕐
剑指 Offer II 007	数组中和为 0 的三个数	🤔 一般	🕐
剑指 Offer II 086	分割回文子字符串	🤔 一般	🕐
剑指 Offer II 087	复原 IP	🤔 一般	🕐
剑指 Offer II 008	和大于等于 target 的最短子数组	🤔 一般	✅
剑指 Offer II 088	爬楼梯的最少成本	🤩 简单	🕐
剑指 Offer II 009	乘积小于 K 的子数组	🤔 一般	✅
剑指 Offer II 089	房屋偷盗	🤔 一般	🕐
剑指 Offer II 010	和为 k 的子数组	🤔 一般	🕐
剑指 Offer II 011	0 和 1 个数相同的子数组	🤔 一般	🕐
剑指 Offer II 012	左右两边子数组的和相等	🤩 简单	🕐
剑指 Offer II 013	二维子矩阵的和	🤔 一般	🕐
剑指 Offer II 014	字符串中的变位词	🤔 一般	🕐
剑指 Offer II 015	字符串中的所有变位词	🤔 一般	🕐
剑指 Offer II 016	不含重复字符的最长子字符串	🤔 一般	🕐
剑指 Offer II 017	含有所有字符的最短字符串	🤯 困难	🕐
剑指 Offer II 018	有效的回文	🤩 简单	🕐
剑指 Offer II 019	最多删除一个字符得到回文	🤩 简单	🕐
剑指 Offer II 020	回文子字符串的个数	🤔 一般	✅
剑指 Offer II 021	删除链表的倒数第 n 个结点	🤔 一般	🕐
剑指 Offer II 022	链表中环的入口节点	🤔 一般	🕐
剑指 Offer II 023	两个链表的第一个重合节点	🤩 简单	🕐
剑指 Offer II 024	反转链表	🤩 简单	🕐
剑指 Offer II 025	链表中的两数相加	🤔 一般	🕐
剑指 Offer II 026	重排链表	🤔 一般	🕐
剑指 Offer II 027	回文链表	🤩 简单	🕐
剑指 Offer II 028	展平多级双向链表	🤔 一般	✅
剑指 Offer II 029	排序的循环链表	🤔 一般	🕐
剑指 Offer II 090	环形房屋偷盗	🤔 一般	🕐
剑指 Offer II 030	插入、删除和随机访问都是 O(1) 的容器	🤔 一般	🕐
剑指 Offer II 091	粉刷房子	🤔 一般	🕐
剑指 Offer II 092	翻转字符	🤔 一般	🕐
剑指 Offer II 031	最近最少使用缓存	🤔 一般	🕐
剑指 Offer II 093	最长斐波那契数列	🤔 一般	🕐
剑指 Offer II 094	最少回文分割	🤯 困难	🕐
剑指 Offer II 032	有效的变位词	🤩 简单	🕐
剑指 Offer II 095	最长公共子序列	🤔 一般	🕐
剑指 Offer II 033	变位词组	🤔 一般	🕐
剑指 Offer II 034	外星语言是否排序	🤩 简单	🕐
剑指 Offer II 096	字符串交织	🤔 一般	🕐
剑指 Offer II 035	最小时间差	🤔 一般	🕐
剑指 Offer II 036	后缀表达式	🤔 一般	🕐
剑指 Offer II 097	子序列的数目	🤯 困难	🕐
剑指 Offer II 037	小行星碰撞	🤔 一般	🕐
剑指 Offer II 038	每日温度	🤔 一般	🕐
剑指 Offer II 039	直方图最大矩形面积	🤯 困难	🕐
剑指 Offer II 040	矩阵中最大的矩形	🤯 困难	🕐
剑指 Offer II 099	最小路径之和	🤔 一般	🕐
剑指 Offer II 100	三角形中最小路径之和	🤔 一般	🕐
剑指 Offer II 101	分割等和子集	🤩 简单	🕐
剑指 Offer II 102	加减的目标值	🤔 一般	🕐
剑指 Offer II 103	最少的硬币数目	🤔 一般	🕐
剑指 Offer II 104	排列的数目	🤔 一般	🕐
剑指 Offer II 105	岛屿的最大面积	🤔 一般	🕐
剑指 Offer II 041	滑动窗口的平均值	🤩 简单	✅
剑指 Offer II 042	最近请求次数	🤩 简单	🕐
剑指 Offer II 106	二分图	🤔 一般	🕐
剑指 Offer II 043	往完全二叉树添加节点	🤔 一般	🕐
剑指 Offer II 107	矩阵中的距离	🤔 一般	🕐
剑指 Offer II 044	二叉树每层的最大值	🤔 一般	✅
剑指 Offer II 045	二叉树最底层最左边的值	🤔 一般	🕐
剑指 Offer II 046	二叉树的右侧视图	🤔 一般	🕐
剑指 Offer II 108	单词演变	🤯 困难	🕐
剑指 Offer II 047	二叉树剪枝	🤔 一般	🕐
剑指 Offer II 109	开密码锁	🤔 一般	🕐
剑指 Offer II 110	所有路径	🤔 一般	🕐
剑指 Offer II 048	序列化与反序列化二叉树	🤯 困难	🕐
剑指 Offer II 111	计算除法	🤔 一般	🕐
剑指 Offer II 049	从根节点到叶节点的路径数字之和	🤔 一般	🕐
剑指 Offer II 050	向下的路径节点之和	🤔 一般	🕐
剑指 Offer II 112	最长递增路径	🤯 困难	🕐
剑指 Offer II 051	节点之和最大的路径	🤯 困难	🕐
剑指 Offer II 113	课程顺序	🤔 一般	🕐
剑指 Offer II 052	展平二叉搜索树	🤩 简单	🕐
剑指 Offer II 114	外星文字典	🤯 困难	🕐
剑指 Offer II 053	二叉搜索树中的中序后继	🤔 一般	🕐
剑指 Offer II 115	重建序列	🤔 一般	🕐
剑指 Offer II 054	所有大于等于节点的值之和	🤔 一般	🕐
剑指 Offer II 055	二叉搜索树迭代器	🤔 一般	🕐
剑指 Offer II 117	相似的字符串	🤯 困难	🕐
剑指 Offer II 118	多余的边	🤔 一般	🕐
剑指 Offer II 056	二叉搜索树中两个节点之和	🤩 简单	🕐
剑指 Offer II 119	最长连续序列	🤔 一般	🕐
剑指 Offer II 057	值和下标之差都在给定的范围内	🤔 一般	🕐
剑指 Offer II 058	日程表	🤔 一般	🕐
剑指 Offer II 059	数据流的第 K 大数值	🤩 简单	🕐
剑指 Offer II 060	出现频率最高的 k 个数字	🤔 一般	🕐
剑指 Offer II 062	实现前缀树	🤔 一般	🕐
剑指 Offer II 061	和最小的 k 个数对	🤔 一般	🕐
剑指 Offer II 063	替换单词	🤔 一般	🕐
剑指 Offer II 064	神奇的字典	🤔 一般	🕐
剑指 Offer II 065	最短的单词编码	🤔 一般	🕐
剑指 Offer II 066	单词之和	🤔 一般	🕐
剑指 Offer II 067	最大的异或	🤔 一般	🕐
剑指 Offer II 068	查找插入位置	🤩 简单	🕐
剑指 Offer II 069	山峰数组的顶部	🤩 简单	🕐
剑指 Offer II 070	排序数组中只出现一次的数字	🤔 一般	🕐
剑指 Offer II 071	按权重生成随机数	🤔 一般	🕐
剑指 Offer II 072	求平方根	🤩 简单	✅
剑指 Offer II 073	狒狒吃香蕉	🤔 一般	🕐
剑指 Offer II 074	合并区间	🤔 一般	🕐
剑指 Offer II 075	数组相对排序	🤩 简单	🕐
剑指 Offer II 076	数组中的第 k 大的数字	🤔 一般	🕐
剑指 Offer II 077	链表排序	🤔 一般	🕐
剑指 Offer II 078	合并排序链表	🤯 困难	🕐
剑指 Offer II 079	所有子集	🤔 一般	🕐
剑指 Offer II 080	含有 k 个元素的组合	🤔 一般	🕐
剑指 Offer II 098	路径的数目	🤔 一般	🕐
剑指 Offer II 116	省份数量	🤔 一般	🕐