LeetCode Solutions

05/27/2016 题解合集 Algorithm LeetCode OJ

近日闲来无事，基本把LeetCode刷了一遍。打算再闲的时候就写写题解，总结一下。因为题目较多，为了避免Leetcode题解泛滥于本博客，所以只用这一篇博客作为所有题解的入口，作为索引或目录页。

以下为刷过的题目列表

ID	Title	Acceptance	Difficulty	Editorial
1	Two Sum	39.1%	Easy	查看题解
2	Add Two Numbers	29.4%	Medium	查看题解
3	Longest Substring Without Repeating Characters	25.2%	Medium	查看题解
4	Median of Two Sorted Arrays	24.3%	Hard	查看题解
5	Longest Palindromic Substring	25.7%	Medium	查看题解
6	ZigZag Conversion	29.1%	Medium	查看题解
7	Reverse Integer	24.5%	Easy	查看题解
8	String to Integer (atoi)	14.2%	Medium	查看题解
9	Palindrome Number	39.3%	Easy	查看题解
10	Regular Expression Matching	24.5%	Hard	查看题解
11	Container With Most Water	39.8%	Medium	查看题解
12	Integer to Roman	48.2%	Medium	查看题解
13	Roman to Integer	50.0%	Easy	查看题解
14	Longest Common Prefix	32.1%	Easy	查看题解
15	3Sum	22.3%	Medium	查看题解
16	3Sum Closest	32.9%	Medium	查看题解
17	Letter Combinations of a Phone Number	38.7%	Medium	查看题解
18	4Sum	28.6%	Medium	查看题解
19	Remove Nth Node From End of List	33.6%	Medium	查看题解
20	Valid Parentheses	34.9%	Easy	查看题解
21	Merge Two Sorted Lists	43.8%	Easy	查看题解
22	Generate Parentheses	51.0%	Medium	查看题解
23	Merge k Sorted Lists	31.0%	Hard	查看题解
24	Swap Nodes in Pairs	41.4%	Medium	查看题解
25	Reverse Nodes in k-Group	33.9%	Hard	查看题解
26	Remove Duplicates from Sorted Array	38.2%	Easy	查看题解
27	Remove Element	42.3%	Easy	查看题解
28	Implement strStr()	30.3%	Easy	查看题解
29	Divide Two Integers	15.8%	Medium	查看题解
30	Substring with Concatenation of All Words	22.5%	Hard	查看题解
31	Next Permutation	29.4%	Medium	查看题解
32	Longest Valid Parentheses	24.1%	Hard	查看题解
33	Search in Rotated Sorted Array	32.2%	Medium	查看题解
34	Find First and Last Position of Element in Sorted Array	32.2%	Medium	查看题解
35	Search Insert Position	40.0%	Easy	查看题解
36	Valid Sudoku	40.0%	Medium	查看题解
37	Sudoku Solver	34.0%	Hard	查看题解
38	Count and Say	38.2%	Easy	查看题解
39	Combination Sum	44.4%	Medium	查看题解
40	Combination Sum II	38.4%	Medium	查看题解
41	First Missing Positive	27.1%	Hard	查看题解
42	Trapping Rain Water	39.9%	Hard	查看题解
43	Multiply Strings	29.0%	Medium	查看题解
44	Wildcard Matching	21.8%	Hard	查看题解
45	Jump Game II	26.5%	Hard	查看题解
46	Permutations	51.0%	Medium	查看题解
47	Permutations II	37.5%	Medium	查看题解
48	Rotate Image	44.8%	Medium	查看题解
49	Group Anagrams	42.2%	Medium	不日更新
50	Pow(x, n)	26.8%	Medium	查看题解
51	N-Queens	35.9%	Hard	查看题解
52	N-Queens II	49.2%	Hard	查看题解
53	Maximum Subarray	41.6%	Easy	查看题解
54	Spiral Matrix	28.6%	Medium	查看题解
55	Jump Game	30.4%	Medium	查看题解
56	Merge Intervals	33.5%	Medium	查看题解
57	Insert Interval	30.0%	Hard	查看题解
58	Length of Last Word	32.0%	Easy	查看题解
59	Spiral Matrix II	43.7%	Medium	查看题解
60	Permutation Sequence	31.1%	Medium	查看题解
61	Rotate List	25.7%	Medium	查看题解
62	Unique Paths	44.9%	Medium	查看题解
63	Unique Paths II	32.8%	Medium	查看题解
64	Minimum Path Sum	43.6%	Medium	查看题解
65	Valid Number	13.3%	Hard	查看题解
66	Plus One	40.0%	Easy	查看题解
67	Add Binary	36.3%	Easy	查看题解
68	Text Justification	21.4%	Hard	查看题解
69	Sqrt(x)	29.7%	Easy	查看题解
70	Climbing Stairs	42.3%	Easy	查看题解
71	Simplify Path	27.3%	Medium	查看题解
72	Edit Distance	34.8%	Hard	查看题解
73	Set Matrix Zeroes	38.0%	Medium	查看题解
74	Search a 2D Matrix	34.4%	Medium	查看题解
75	Sort Colors	40.3%	Medium	查看题解
76	Minimum Window Substring	28.7%	Hard	查看题解
77	Combinations	44.1%	Medium	查看题解
78	Subsets	48.6%	Medium	查看题解
79	Word Search	29.3%	Medium	查看题解
80	Remove Duplicates from Sorted Array II	38.5%	Medium	查看题解
81	Search in Rotated Sorted Array II	32.4%	Medium	查看题解
82	Remove Duplicates from Sorted List II	31.3%	Medium	查看题解
83	Remove Duplicates from Sorted List	41.1%	Easy	查看题解
84	Largest Rectangle in Histogram	29.1%	Hard	查看题解
85	Maximal Rectangle	31.2%	Hard	查看题解
86	Partition List	35.2%	Medium	查看题解
87	Scramble String	30.5%	Hard	查看题解
88	Merge Sorted Array	33.7%	Easy	查看题解
89	Gray Code	44.0%	Medium	查看题解
90	Subsets II	40.2%	Medium	查看题解
91	Decode Ways	21.2%	Medium	查看题解
92	Reverse Linked List II	32.9%	Medium	查看题解
93	Restore IP Addresses	29.7%	Medium	查看题解
94	Binary Tree Inorder Traversal	53.0%	Medium	查看题解
95	Unique Binary Search Trees II	33.6%	Medium	查看题解
96	Unique Binary Search Trees	43.7%	Medium	查看题解
97	Interleaving String	26.3%	Hard	查看题解
98	Validate Binary Search Tree	24.6%	Medium	查看题解
99	Recover Binary Search Tree	32.8%	Hard	查看题解
100	Same Tree	48.7%	Easy	查看题解
101	Symmetric Tree	41.7%	Easy	查看题解
102	Binary Tree Level Order Traversal	45.3%	Medium	查看题解
103	Binary Tree Zigzag Level Order Traversal	38.9%	Medium	查看题解
104	Maximum Depth of Binary Tree	57.5%	Easy	查看题解
105	Construct Binary Tree from Preorder and Inorder Traversal	37.5%	Medium	查看题解
106	Construct Binary Tree from Inorder and Postorder Traversal	36.4%	Medium	查看题解
107	Binary Tree Level Order Traversal II	44.2%	Easy	查看题解
108	Convert Sorted Array to Binary Search Tree	47.3%	Easy	查看题解
109	Convert Sorted List to Binary Search Tree	38.0%	Medium	查看题解
110	Balanced Binary Tree	39.5%	Easy	查看题解
111	Minimum Depth of Binary Tree	34.3%	Easy	查看题解
112	Path Sum	36.1%	Easy	查看题解
113	Path Sum II	38.0%	Medium	查看题解
114	Flatten Binary Tree to Linked List	39.3%	Medium	查看题解
115	Distinct Subsequences	33.6%	Hard	查看题解
116	Populating Next Right Pointers in Each Node	36.5%	Medium	查看题解
117	Populating Next Right Pointers in Each Node II	33.4%	Medium	查看题解
118	Pascal's Triangle	42.7%	Easy	查看题解
119	Pascal's Triangle II	40.4%	Easy	查看题解
120	Triangle	37.0%	Medium	查看题解
121	Best Time to Buy and Sell Stock	44.8%	Easy	查看题解
122	Best Time to Buy and Sell Stock II	49.6%	Easy	查看题解
123	Best Time to Buy and Sell Stock III	31.9%	Hard	查看题解
124	Binary Tree Maximum Path Sum	28.3%	Hard	查看题解
125	Valid Palindrome	29.0%	Easy	查看题解
126	Word Ladder II	16.0%	Hard	查看题解
127	Word Ladder	21.6%	Medium	查看题解
128	Longest Consecutive Sequence	39.7%	Hard	查看题解
129	Sum Root to Leaf Numbers	39.9%	Medium	查看题解
130	Surrounded Regions	21.1%	Medium	查看题解
131	Palindrome Partitioning	38.0%	Medium	查看题解
132	Palindrome Partitioning II	26.0%	Hard	查看题解
133	Clone Graph	25.1%	Medium	查看题解
134	Gas Station	31.8%	Medium	查看题解
135	Candy	26.6%	Hard	查看题解
136	Single Number	57.5%	Easy	查看题解
137	Single Number II	44.1%	Medium	查看题解
138	Copy List with Random Pointer	25.6%	Medium	查看题解
139	Word Break	33.0%	Medium	查看题解
140	Word Break II	25.7%	Hard	查看题解
141	Linked List Cycle	34.6%	Easy	查看题解
142	Linked List Cycle II	29.9%	Medium	查看题解
143	Reorder List	28.6%	Medium	查看题解
144	Binary Tree Preorder Traversal	49.0%	Medium	查看题解
145	Binary Tree Postorder Traversal	45.1%	Hard	查看题解
146	LRU Cache	22.1%	Hard	查看题解
147	Insertion Sort List	35.4%	Medium	查看题解
148	Sort List	32.3%	Medium	查看题解
149	Max Points on a Line	15.3%	Hard	查看题解
150	Evaluate Reverse Polish Notation	30.2%	Medium	查看题解
151	Reverse Words in a String	15.7%	Medium	查看题解
152	Maximum Product Subarray	27.8%	Medium	查看题解
153	Find Minimum in Rotated Sorted Array	41.8%	Medium	查看题解
154	Find Minimum in Rotated Sorted Array II	38.5%	Hard	查看题解
155	Min Stack	33.8%	Easy	查看题解
160	Intersection of Two Linked Lists	30.8%	Easy	查看题解
162	Find Peak Element	40.0%	Medium	查看题解
164	Maximum Gap	31.1%	Hard	查看题解
165	Compare Version Numbers	21.8%	Medium	查看题解
166	Fraction to Recurring Decimal	18.7%	Medium	查看题解
167	Two Sum II - Input array is sorted	47.9%	Easy	不日更新
168	Excel Sheet Column Title	28.1%	Easy	查看题解
169	Majority Element	50.0%	Easy	查看题解
171	Excel Sheet Column Number	50.0%	Easy	查看题解
172	Factorial Trailing Zeroes	36.9%	Easy	查看题解
173	Binary Search Tree Iterator	45.0%	Medium	查看题解
174	Dungeon Game	25.5%	Hard	不日更新
179	Largest Number	24.5%	Medium	查看题解
187	Repeated DNA Sequences	34.4%	Medium	查看题解
188	Best Time to Buy and Sell Stock IV	25.4%	Hard	查看题解
189	Rotate Array	27.4%	Easy	查看题解
190	Reverse Bits	29.2%	Easy	查看题解
191	Number of 1 Bits	40.9%	Easy	查看题解
198	House Robber	40.4%	Easy	查看题解
199	Binary Tree Right Side View	45.0%	Medium	查看题解
200	Number of Islands	38.5%	Medium	查看题解
201	Bitwise AND of Numbers Range	35.0%	Medium	查看题解
202	Happy Number	43.1%	Easy	查看题解
203	Remove Linked List Elements	34.5%	Easy	查看题解
204	Count Primes	27.3%	Easy	查看题解
205	Isomorphic Strings	35.8%	Easy	查看题解
206	Reverse Linked List	50.3%	Easy	查看题解
207	Course Schedule	35.3%	Medium	查看题解
208	Implement Trie (Prefix Tree)	34.5%	Medium	查看题解
209	Minimum Size Subarray Sum	33.4%	Medium	查看题解
210	Course Schedule II	32.2%	Medium	查看题解
211	Add and Search Word - Data structure design	27.6%	Medium	查看题解
212	Word Search II	26.3%	Hard	不日更新
213	House Robber II	34.7%	Medium	查看题解
214	Shortest Palindrome	26.2%	Hard	查看题解
215	Kth Largest Element in an Array	43.7%	Medium	查看题解
216	Combination Sum III	49.1%	Medium	查看题解
217	Contains Duplicate	49.3%	Easy	查看题解
218	The Skyline Problem	30.1%	Hard	不日更新
219	Contains Duplicate II	33.9%	Easy	查看题解
220	Contains Duplicate III	19.0%	Medium	查看题解
221	Maximal Square	31.4%	Medium	查看题解
222	Count Complete Tree Nodes	29.1%	Medium	查看题解
223	Rectangle Area	34.9%	Medium	查看题解
224	Basic Calculator	30.4%	Hard	查看题解
225	Implement Stack using Queues	36.4%	Easy	查看题解
226	Invert Binary Tree	55.6%	Easy	查看题解
227	Basic Calculator II	31.6%	Medium	查看题解
228	Summary Ranges	34.0%	Medium	不日更新
229	Majority Element II	30.5%	Medium	不日更新
230	Kth Smallest Element in a BST	48.1%	Medium	不日更新
231	Power of Two	41.2%	Easy	查看题解
232	Implement Queue using Stacks	40.3%	Easy	查看题解
233	Number of Digit One	29.4%	Hard	不日更新
234	Palindrome Linked List	34.4%	Easy	查看题解
235	Lowest Common Ancestor of a Binary Search Tree	41.9%	Easy	查看题解
236	Lowest Common Ancestor of a Binary Tree	33.0%	Medium	查看题解
237	Delete Node in a Linked List	50.0%	Easy	查看题解
238	Product of Array Except Self	52.3%	Medium	查看题解
239	Sliding Window Maximum	35.8%	Hard	查看题解
240	Search a 2D Matrix II	39.5%	Medium	查看题解
241	Different Ways to Add Parentheses	47.8%	Medium	查看题解
242	Valid Anagram	49.4%	Easy	查看题解
257	Binary Tree Paths	43.6%	Easy	查看题解
258	Add Digits	52.9%	Easy	查看题解
260	Single Number III	55.0%	Medium	查看题解
263	Ugly Number	40.0%	Easy	查看题解
264	Ugly Number II	34.5%	Medium	查看题解
268	Missing Number	46.4%	Easy	查看题解
273	Integer to English Words	23.3%	Hard	查看题解
274	H-Index	34.2%	Medium	查看题解
275	H-Index II	35.0%	Medium	查看题解
278	First Bad Version	27.6%	Easy	查看题解
279	Perfect Squares	39.1%	Medium	查看题解
282	Expression Add Operators	31.4%	Hard	查看题解
283	Move Zeroes	52.6%	Easy	查看题解
284	Peeking Iterator	37.5%	Medium	查看题解
287	Find the Duplicate Number	46.5%	Medium	查看题解
289	Game of Life	40.6%	Medium	查看题解
290	Word Pattern	34.1%	Easy	查看题解
292	Nim Game	55.4%	Easy	查看题解
295	Find Median from Data Stream	32.5%	Hard	查看题解
297	Serialize and Deserialize Binary Tree	37.5%	Hard	查看题解
299	Bulls and Cows	37.4%	Medium	查看题解
300	Longest Increasing Subsequence	39.5%	Medium	查看题解
301	Remove Invalid Parentheses	37.0%	Hard	不日更新
303	Range Sum Query - Immutable	34.9%	Easy	查看题解
304	Range Sum Query 2D - Immutable	29.6%	Medium	查看题解
306	Additive Number	27.9%	Medium	查看题解
307	Range Sum Query - Mutable	25.5%	Medium	查看题解
309	Best Time to Buy and Sell Stock with Cooldown	42.8%	Medium	查看题解
310	Minimum Height Trees	29.2%	Medium	查看题解
312	Burst Balloons	44.9%	Hard	查看题解
313	Super Ugly Number	39.7%	Medium	查看题解
315	Count of Smaller Numbers After Self	35.9%	Hard	不日更新
316	Remove Duplicate Letters	31.1%	Hard	查看题解
318	Maximum Product of Word Lengths	46.9%	Medium	查看题解
319	Bulb Switcher	43.4%	Medium	查看题解
321	Create Maximum Number	24.9%	Hard	不日更新
322	Coin Change	27.6%	Medium	查看题解
324	Wiggle Sort II	26.8%	Medium	查看题解
326	Power of Three	41.0%	Easy	查看题解
327	Count of Range Sum	31.3%	Hard	不日更新
328	Odd Even Linked List	46.8%	Medium	查看题解
329	Longest Increasing Path in a Matrix	38.1%	Hard	查看题解
330	Patching Array	33.0%	Hard	查看题解
331	Verify Preorder Serialization of a Binary Tree	37.7%	Medium	查看题解
332	Reconstruct Itinerary	30.0%	Medium	查看题解
334	Increasing Triplet Subsequence	39.3%	Medium	查看题解
335	Self Crossing	26.6%	Hard	不日更新
336	Palindrome Pairs	28.4%	Hard	不日更新
337	House Robber III	46.1%	Medium	查看题解
338	Counting Bits	63.1%	Medium	查看题解
341	Flatten Nested List Iterator	45.1%	Medium	查看题解
342	Power of Four	39.7%	Easy	查看题解
343	Integer Break	46.8%	Medium	查看题解
344	Reverse String	61.7%	Easy	查看题解
345	Reverse Vowels of a String	40.1%	Easy	查看题解
347	Top K Frequent Elements	51.5%	Medium	查看题解
349	Intersection of Two Arrays	50.7%	Easy	查看题解
350	Intersection of Two Arrays II	45.4%	Easy	查看题解
352	Data Stream as Disjoint Intervals	42.0%	Hard	不日更新
354	Russian Doll Envelopes	32.9%	Hard	不日更新
355	Design Twitter	26.3%	Medium	不日更新
357	Count Numbers with Unique Digits	46.2%	Medium	不日更新
363	Max Sum of Rectangle No Larger Than K	34.2%	Hard	不日更新
365	Water and Jug Problem	28.4%	Medium	不日更新
367	Valid Perfect Square	38.9%	Easy	不日更新
368	Largest Divisible Subset	34.1%	Medium	不日更新
371	Sum of Two Integers	51.0%	Easy	不日更新
372	Super Pow	35.0%	Medium	不日更新
373	Find K Pairs with Smallest Sums	32.1%	Medium	不日更新
374	Guess Number Higher or Lower	37.9%	Easy	不日更新
375	Guess Number Higher or Lower II	36.5%	Medium	不日更新
376	Wiggle Subsequence	36.4%	Medium	不日更新
377	Combination Sum IV	43.4%	Medium	不日更新
378	Kth Smallest Element in a Sorted Matrix	46.7%	Medium	不日更新
380	Insert Delete GetRandom O(1)	40.9%	Medium	不日更新
381	Insert Delete GetRandom O(1) - Duplicates allowed	30.4%	Hard	不日更新
382	Linked List Random Node	48.1%	Medium	不日更新
383	Ransom Note	48.6%	Easy	不日更新
384	Shuffle an Array	48.4%	Medium	不日更新
385	Mini Parser	31.1%	Medium	不日更新
386	Lexicographical Numbers	43.6%	Medium	不日更新
387	First Unique Character in a String	47.8%	Easy	不日更新
388	Longest Absolute File Path	38.1%	Medium	不日更新
389	Find the Difference	52.0%	Easy	不日更新
390	Elimination Game	43.0%	Medium	不日更新
391	Perfect Rectangle	27.5%	Hard	不日更新
392	Is Subsequence	45.3%	Medium	不日更新
393	UTF-8 Validation	34.9%	Medium	不日更新
394	Decode String	42.6%	Medium	不日更新
395	Longest Substring with At Least K Repeating Characters	36.8%	Medium	不日更新
396	Rotate Function	34.4%	Medium	不日更新
397	Integer Replacement	30.7%	Medium	不日更新
398	Random Pick Index	47.1%	Medium	不日更新
399	Evaluate Division	44.3%	Medium	不日更新
400	Nth Digit	29.9%	Easy	不日更新
401	Binary Watch	44.8%	Easy	不日更新
402	Remove K Digits	25.5%	Medium	不日更新
403	Frog Jump	34.0%	Hard	不日更新
404	Sum of Left Leaves	48.1%	Easy	不日更新
405	Convert a Number to Hexadecimal	41.2%	Easy	不日更新
406	Queue Reconstruction by Height	57.4%	Medium	不日更新
407	Trapping Rain Water II	38.1%	Hard	不日更新
409	Longest Palindrome	46.6%	Easy	不日更新
410	Split Array Largest Sum	40.4%	Hard	不日更新
412	Fizz Buzz	58.0%	Easy	不日更新
413	Arithmetic Slices	54.5%	Medium	不日更新
414	Third Maximum Number	28.2%	Easy	不日更新
415	Add Strings	42.3%	Easy	不日更新
416	Partition Equal Subset Sum	38.9%	Medium	不日更新
417	Pacific Atlantic Water Flow	35.6%	Medium	不日更新
419	Battleships in a Board	64.3%	Medium	不日更新
420	Strong Password Checker	18.5%	Hard	不日更新
421	Maximum XOR of Two Numbers in an Array	49.5%	Medium	不日更新
423	Reconstruct Original Digits from English	44.9%	Medium	不日更新
424	Longest Repeating Character Replacement	42.9%	Medium	不日更新
432	All O`one Data Structure	28.4%	Hard	不日更新
433	Minimum Genetic Mutation	36.2%	Medium	不日更新
434	Number of Segments in a String	36.4%	Easy	不日更新
435	Non-overlapping Intervals	41.0%	Medium	不日更新
436	Find Right Interval	41.8%	Medium	不日更新
437	Path Sum III	40.7%	Easy	不日更新
438	Find All Anagrams in a String	34.9%	Easy	不日更新
440	K-th Smallest in Lexicographical Order	25.8%	Hard	不日更新
441	Arranging Coins	36.7%	Easy	不日更新
442	Find All Duplicates in an Array	58.5%	Medium	不日更新
443	String Compression	35.8%	Easy	不日更新
445	Add Two Numbers II	47.8%	Medium	不日更新
446	Arithmetic Slices II - Subsequence	28.6%	Hard	不日更新
447	Number of Boomerangs	48.1%	Easy	不日更新
448	Find All Numbers Disappeared in an Array	51.6%	Easy	不日更新
449	Serialize and Deserialize BST	44.1%	Medium	不日更新
450	Delete Node in a BST	38.1%	Medium	不日更新
451	Sort Characters By Frequency	53.4%	Medium	不日更新
452	Minimum Number of Arrows to Burst Balloons	44.9%	Medium	不日更新
453	Minimum Moves to Equal Array Elements	48.5%	Easy	不日更新
454	4Sum II	48.6%	Medium	不日更新
455	Assign Cookies	47.5%	Easy	不日更新
456	132 Pattern	27.3%	Medium	不日更新
457	Circular Array Loop	25.4%	Medium	不日更新
458	Poor Pigs	43.8%	Easy	不日更新
459	Repeated Substring Pattern	38.8%	Easy	不日更新
460	LFU Cache	26.7%	Hard	不日更新
461	Hamming Distance	69.5%	Easy	不日更新
462	Minimum Moves to Equal Array Elements II	52.0%	Medium	不日更新
463	Island Perimeter	59.0%	Easy	不日更新
464	Can I Win	26.2%	Medium	不日更新
466	Count The Repetitions	27.1%	Hard	不日更新
467	Unique Substrings in Wraparound String	33.2%	Medium	不日更新
468	Validate IP Address	20.5%	Medium	不日更新
472	Concatenated Words	32.2%	Hard	不日更新
473	Matchsticks to Square	35.2%	Medium	不日更新
474	Ones and Zeroes	38.8%	Medium	不日更新
475	Heaters	30.1%	Easy	不日更新
476	Number Complement	61.5%	Easy	不日更新
477	Total Hamming Distance	47.9%	Medium	不日更新
479	Largest Palindrome Product	26.2%	Easy	不日更新
480	Sliding Window Median	30.7%	Hard	不日更新
481	Magical String	45.5%	Medium	不日更新
482	License Key Formatting	39.1%	Easy	不日更新
483	Smallest Good Base	33.7%	Hard	不日更新
485	Max Consecutive Ones	53.8%	Easy	不日更新
486	Predict the Winner	46.0%	Medium	不日更新
488	Zuma Game	36.5%	Hard	不日更新
491	Increasing Subsequences	40.3%	Medium	不日更新
492	Construct the Rectangle	48.0%	Easy	不日更新
493	Reverse Pairs	21.4%	Hard	不日更新
494	Target Sum	44.2%	Medium	不日更新
495	Teemo Attacking	51.4%	Medium	不日更新
496	Next Greater Element I	57.4%	Easy	不日更新
498	Diagonal Traverse	44.1%	Medium	不日更新
500	Keyboard Row	60.8%	Easy	不日更新
501	Find Mode in Binary Search Tree	38.1%	Easy	不日更新
502	IPO	36.6%	Hard	不日更新
503	Next Greater Element II	48.7%	Medium	不日更新
504	Base 7	44.0%	Easy	不日更新
506	Relative Ranks	47.3%	Easy	不日更新
507	Perfect Number	32.6%	Easy	不日更新
508	Most Frequent Subtree Sum	52.9%	Medium	不日更新
513	Find Bottom Left Tree Value	57.1%	Medium	不日更新
514	Freedom Trail	39.7%	Hard	不日更新
515	Find Largest Value in Each Tree Row	56.4%	Medium	不日更新
516	Longest Palindromic Subsequence	44.0%	Medium	不日更新
517	Super Washing Machines	36.4%	Hard	不日更新
518	Coin Change 2	39.0%	Medium	不日更新
520	Detect Capital	51.9%	Easy	不日更新
521	Longest Uncommon Subsequence I	55.8%	Easy	不日更新
522	Longest Uncommon Subsequence II	32.4%	Medium	不日更新
523	Continuous Subarray Sum	23.7%	Medium	不日更新
524	Longest Word in Dictionary through Deleting	43.9%	Medium	不日更新
525	Contiguous Array	42.1%	Medium	不日更新
526	Beautiful Arrangement	52.9%	Medium	不日更新
529	Minesweeper	50.4%	Medium	不日更新
530	Minimum Absolute Difference in BST	48.7%	Easy	不日更新
532	K-diff Pairs in an Array	28.6%	Easy	不日更新
535	Encode and Decode TinyURL	74.6%	Medium	不日更新
537	Complex Number Multiplication	64.3%	Medium	不日更新
538	Convert BST to Greater Tree	48.9%	Easy	不日更新
539	Minimum Time Difference	46.6%	Medium	不日更新
540	Single Element in a Sorted Array	56.2%	Medium	不日更新
541	Reverse String II	44.4%	Easy	不日更新
542	01 Matrix	33.7%	Medium	不日更新
543	Diameter of Binary Tree	45.3%	Easy	不日更新
546	Remove Boxes	36.7%	Hard	不日更新
547	Friend Circles	50.8%	Medium	不日更新
551	Student Attendance Record I	45.0%	Easy	不日更新
552	Student Attendance Record II	31.6%	Hard	不日更新
553	Optimal Division	55.0%	Medium	不日更新
554	Brick Wall	46.9%	Medium	不日更新
556	Next Greater Element III	29.1%	Medium	不日更新
557	Reverse Words in a String III	61.9%	Easy	不日更新
560	Subarray Sum Equals K	40.4%	Medium	不日更新
561	Array Partition I	67.3%	Easy	不日更新
563	Binary Tree Tilt	46.4%	Easy	不日更新
564	Find the Closest Palindrome	17.3%	Hard	不日更新
565	Array Nesting	50.3%	Medium	不日更新
566	Reshape the Matrix	57.9%	Easy	不日更新
567	Permutation in String	36.7%	Medium	不日更新
572	Subtree of Another Tree	40.5%	Easy	不日更新
575	Distribute Candies	58.5%	Easy	不日更新
576	Out of Boundary Paths	30.8%	Medium	不日更新
581	Shortest Unsorted Continuous Subarray	29.3%	Easy	不日更新
583	Delete Operation for Two Strings	44.8%	Medium	不日更新
587	Erect the Fence	33.6%	Hard	不日更新
591	Tag Validator	31.4%	Hard	不日更新
592	Fraction Addition and Subtraction	46.1%	Medium	不日更新
593	Valid Square	39.9%	Medium	不日更新
594	Longest Harmonious Subsequence	41.8%	Easy	不日更新
598	Range Addition II	48.0%	Easy	不日更新
599	Minimum Index Sum of Two Lists	46.6%	Easy	不日更新
600	Non-negative Integers without Consecutive Ones	31.9%	Hard	不日更新
605	Can Place Flowers	30.2%	Easy	不日更新
606	Construct String from Binary Tree	50.5%	Easy	不日更新
609	Find Duplicate File in System	53.2%	Medium	不日更新
611	Valid Triangle Number	43.2%	Medium	不日更新
617	Merge Two Binary Trees	67.8%	Easy	不日更新
621	Task Scheduler	42.9%	Medium	不日更新
623	Add One Row to Tree	46.6%	Medium	不日更新
628	Maximum Product of Three Numbers	44.9%	Easy	不日更新
629	K Inverse Pairs Array	28.0%	Hard	不日更新
630	Course Schedule III	30.0%	Hard	不日更新
632	Smallest Range	44.2%	Hard	不日更新
633	Sum of Square Numbers	32.4%	Easy	不日更新
636	Exclusive Time of Functions	46.3%	Medium	不日更新
637	Average of Levels in Binary Tree	56.9%	Easy	不日更新
638	Shopping Offers	46.5%	Medium	不日更新
639	Decode Ways II	24.1%	Hard	不日更新
640	Solve the Equation	38.9%	Medium	不日更新
643	Maximum Average Subarray I	38.1%	Easy	不日更新
645	Set Mismatch	40.0%	Easy	不日更新
646	Maximum Length of Pair Chain	47.3%	Medium	不日更新
647	Palindromic Substrings	54.6%	Medium	不日更新
648	Replace Words	49.5%	Medium	不日更新
649	Dota2 Senate	36.7%	Medium	不日更新
650	2 Keys Keyboard	45.9%	Medium	不日更新
652	Find Duplicate Subtrees	41.2%	Medium	不日更新
653	Two Sum IV - Input is a BST	51.0%	Easy	不日更新
654	Maximum Binary Tree	71.4%	Medium	不日更新
655	Print Binary Tree	49.3%	Medium	不日更新
657	Robot Return to Origin	69.4%	Easy	不日更新
658	Find K Closest Elements	35.4%	Medium	不日更新
659	Split Array into Consecutive Subsequences	37.9%	Medium	不日更新
661	Image Smoother	47.1%	Easy	不日更新
662	Maximum Width of Binary Tree	39.0%	Medium	不日更新
664	Strange Printer	35.3%	Hard	不日更新
665	Non-decreasing Array	19.7%	Easy	不日更新
667	Beautiful Arrangement II	50.9%	Medium	不日更新
668	Kth Smallest Number in Multiplication Table	39.6%	Hard	不日更新
669	Trim a Binary Search Tree	58.8%	Easy	不日更新
670	Maximum Swap	38.9%	Medium	不日更新
671	Second Minimum Node In a Binary Tree	42.6%	Easy	不日更新
672	Bulb Switcher II	49.3%	Medium	不日更新
673	Number of Longest Increasing Subsequence	32.3%	Medium	不日更新
674	Longest Continuous Increasing Subsequence	43.1%	Easy	不日更新
675	Cut Off Trees for Golf Event	27.7%	Hard	不日更新
676	Implement Magic Dictionary	49.7%	Medium	不日更新
677	Map Sum Pairs	50.6%	Medium	不日更新
678	Valid Parenthesis String	30.5%	Medium	不日更新
679	24 Game	39.9%	Hard	不日更新
680	Valid Palindrome II	32.9%	Easy	不日更新
682	Baseball Game	59.0%	Easy	不日更新
684	Redundant Connection	47.6%	Medium	不日更新
685	Redundant Connection II	28.8%	Hard	不日更新
686	Repeated String Match	31.3%	Easy	不日更新
687	Longest Univalue Path	32.7%	Easy	不日更新
688	Knight Probability in Chessboard	41.1%	Medium	不日更新
689	Maximum Sum of 3 Non-Overlapping Subarrays	42.5%	Hard	不日更新
690	Employee Importance	52.0%	Easy	不日更新
691	Stickers to Spell Word	36.6%	Hard	不日更新
692	Top K Frequent Words	43.1%	Medium	不日更新
693	Binary Number with Alternating Bits	56.7%	Easy	不日更新
695	Max Area of Island	53.8%	Medium	不日更新
696	Count Binary Substrings	51.5%	Easy	不日更新
697	Degree of an Array	47.7%	Easy	不日更新
698	Partition to K Equal Sum Subsets	39.4%	Medium	不日更新
699	Falling Squares	38.4%	Hard	不日更新
712	Minimum ASCII Delete Sum for Two Strings	52.3%	Medium	不日更新
713	Subarray Product Less Than K	34.4%	Medium	不日更新
714	Best Time to Buy and Sell Stock with Transaction Fee	48.1%	Medium	不日更新
715	Range Module	32.1%	Hard	不日更新
717	1-bit and 2-bit Characters	48.5%	Easy	不日更新
718	Maximum Length of Repeated Subarray	43.0%	Medium	不日更新
719	Find K-th Smallest Pair Distance	28.1%	Hard	不日更新
720	Longest Word in Dictionary	42.3%	Easy	不日更新
721	Accounts Merge	36.6%	Medium	不日更新
722	Remove Comments	29.2%	Medium	不日更新
724	Find Pivot Index	39.5%	Easy	不日更新
725	Split Linked List in Parts	47.6%	Medium	不日更新
726	Number of Atoms	43.6%	Hard	不日更新
728	Self Dividing Numbers	67.3%	Easy	不日更新
729	My Calendar I	44.7%	Medium	不日更新
730	Count Different Palindromic Subsequences	37.2%	Hard	不日更新
731	My Calendar II	40.4%	Medium	不日更新
732	My Calendar III	51.0%	Hard	不日更新
733	Flood Fill	48.3%	Easy	不日更新
735	Asteroid Collision	37.1%	Medium	不日更新
736	Parse Lisp Expression	41.1%	Hard	不日更新
738	Monotone Increasing Digits	41.1%	Medium	不日更新
739	Daily Temperatures	56.4%	Medium	不日更新
740	Delete and Earn	44.3%	Medium	不日更新
741	Cherry Pickup	25.6%	Hard	不日更新
709	To Lower Case	74.5%	Easy	不日更新
743	Network Delay Time	37.7%	Easy	不日更新
744	Find Smallest Letter Greater Than Target	42.9%	Easy	不日更新
745	Prefix and Suffix Search	27.9%	Hard	不日更新
746	Min Cost Climbing Stairs	44.4%	Easy	不日更新
747	Largest Number At Least Twice of Others	39.9%	Easy	不日更新
748	Shortest Completing Word	52.7%	Easy	不日更新
749	Contain Virus	40.7%	Hard	不日更新
752	Open the Lock	42.3%	Medium	不日更新
753	Cracking the Safe	42.9%	Hard	不日更新
754	Reach a Number	29.6%	Easy	不日更新
756	Pyramid Transition Matrix	48.1%	Medium	不日更新
757	Set Intersection Size At Least Two	35.0%	Hard	不日更新
761	Special Binary String	46.5%	Hard	不日更新
429	N-ary Tree Level Order Traversal	55.7%	Easy	不日更新
430	Flatten a Multilevel Doubly Linked List	36.1%	Medium	不日更新
762	Prime Number of Set Bits in Binary Representation	56.3%	Easy	不日更新
763	Partition Labels	66.0%	Medium	不日更新
764	Largest Plus Sign	41.5%	Medium	不日更新
765	Couples Holding Hands	49.0%	Hard	不日更新
427	Construct Quad Tree	48.9%	Easy	不日更新
558	Quad Tree Intersection	36.3%	Easy	不日更新
559	Maximum Depth of N-ary Tree	62.2%	Easy	不日更新
589	N-ary Tree Preorder Traversal	63.0%	Easy	不日更新
590	N-ary Tree Postorder Traversal	62.9%	Easy	不日更新
766	Toeplitz Matrix	59.7%	Easy	不日更新
767	Reorganize String	39.5%	Medium	不日更新
768	Max Chunks To Make Sorted II	44.0%	Hard	不日更新
769	Max Chunks To Make Sorted	49.4%	Medium	不日更新
770	Basic Calculator IV	41.7%	Hard	不日更新
771	Jewels and Stones	81.7%	Easy	不日更新
700	Search in a Binary Search Tree	62.6%	Easy	不日更新
701	Insert into a Binary Search Tree	67.8%	Medium	不日更新
773	Sliding Puzzle	47.8%	Hard	不日更新
703	Kth Largest Element in a Stream	39.4%	Easy	不日更新
775	Global and Local Inversions	36.1%	Medium	不日更新
704	Binary Search	39.9%	Easy	不日更新
777	Swap Adjacent in LR String	30.1%	Medium	不日更新
778	Swim in Rising Water	45.0%	Hard	不日更新
779	K-th Symbol in Grammar	37.4%	Medium	不日更新
780	Reaching Points	25.3%	Hard	不日更新
781	Rabbits in Forest	49.7%	Medium	不日更新
782	Transform to Chessboard	38.0%	Hard	不日更新
783	Minimum Distance Between BST Nodes	48.6%	Easy	不日更新
784	Letter Case Permutation	53.6%	Easy	不日更新
785	Is Graph Bipartite?	40.3%	Medium	不日更新
786	K-th Smallest Prime Fraction	35.7%	Hard	不日更新
787	Cheapest Flights Within K Stops	31.4%	Medium	不日更新
788	Rotated Digits	51.2%	Easy	不日更新
789	Escape The Ghosts	53.4%	Medium	不日更新
790	Domino and Tromino Tiling	34.0%	Medium	不日更新
791	Custom Sort String	59.6%	Medium	不日更新
792	Number of Matching Subsequences	39.1%	Medium	不日更新
793	Preimage Size of Factorial Zeroes Function	39.5%	Hard	不日更新
794	Valid Tic-Tac-Toe State	28.0%	Medium	不日更新
795	Number of Subarrays with Bounded Maximum	41.4%	Medium	不日更新
796	Rotate String	48.7%	Easy	不日更新
797	All Paths From Source to Target	67.6%	Medium	不日更新
798	Smallest Rotation with Highest Score	36.7%	Hard	不日更新
799	Champagne Tower	30.8%	Medium	不日更新
705	Design HashSet	43.4%	Easy	不日更新
706	Design HashMap	48.9%	Easy	不日更新
801	Minimum Swaps To Make Sequences Increasing	32.7%	Medium	不日更新
802	Find Eventual Safe States	41.3%	Medium	不日更新
803	Bricks Falling When Hit	24.8%	Hard	不日更新
804	Unique Morse Code Words	71.7%	Easy	不日更新
805	Split Array With Same Average	22.4%	Hard	不日更新
806	Number of Lines To Write String	61.8%	Easy	不日更新
807	Max Increase to Keep City Skyline	80.1%	Medium	不日更新
808	Soup Servings	34.5%	Medium	不日更新
809	Expressive Words	39.4%	Medium	不日更新
810	Chalkboard XOR Game	42.0%	Hard	不日更新
811	Subdomain Visit Count	61.6%	Easy	不日更新
812	Largest Triangle Area	53.8%	Easy	不日更新
813	Largest Sum of Averages	42.4%	Medium	不日更新
814	Binary Tree Pruning	68.3%	Medium	不日更新
815	Bus Routes	36.1%	Hard	不日更新
816	Ambiguous Coordinates	42.4%	Medium	不日更新
817	Linked List Components	51.9%	Medium	不日更新
818	Race Car	31.2%	Hard	不日更新
819	Most Common Word	41.6%	Easy	不日更新
707	Design Linked List	19.1%	Easy	不日更新
820	Short Encoding of Words	44.5%	Medium	不日更新
821	Shortest Distance to a Character	61.1%	Easy	不日更新
822	Card Flipping Game	38.6%	Medium	不日更新
823	Binary Trees With Factors	30.5%	Medium	不日更新
824	Goat Latin	55.2%	Easy	不日更新
825	Friends Of Appropriate Ages	33.1%	Medium	不日更新
826	Most Profit Assigning Work	33.2%	Medium	不日更新
827	Making A Large Island	40.5%	Hard	不日更新
828	Unique Letter String	36.7%	Hard	不日更新
829	Consecutive Numbers Sum	29.5%	Hard	不日更新
830	Positions of Large Groups	46.2%	Easy	不日更新
831	Masking Personal Information	41.6%	Medium	不日更新
641	Design Circular Deque	47.9%	Medium	不日更新
622	Design Circular Queue	36.7%	Medium	不日更新
832	Flipping an Image	69.1%	Easy	不日更新
833	Find And Replace in String	41.8%	Medium	不日更新
834	Sum of Distances in Tree	35.1%	Hard	不日更新
835	Image Overlap	47.4%	Medium	不日更新
836	Rectangle Overlap	44.4%	Easy	不日更新
837	New 21 Game	26.9%	Medium	不日更新
838	Push Dominoes	41.6%	Medium	不日更新
839	Similar String Groups	32.9%	Hard	不日更新
840	Magic Squares In Grid	34.7%	Easy	不日更新
841	Keys and Rooms	57.4%	Medium	不日更新
842	Split Array into Fibonacci Sequence	33.8%	Medium	不日更新
843	Guess the Word	39.2%	Hard	不日更新
844	Backspace String Compare	43.3%	Easy	不日更新
845	Longest Mountain in Array	32.2%	Medium	不日更新
846	Hand of Straights	46.0%	Medium	不日更新
847	Shortest Path Visiting All Nodes	43.7%	Hard	不日更新
848	Shifting Letters	37.0%	Medium	不日更新
849	Maximize Distance to Closest Person	38.5%	Easy	不日更新
850	Rectangle Area II	41.7%	Hard	不日更新
851	Loud and Rich	45.0%	Medium	不日更新
852	Peak Index in a Mountain Array	67.1%	Easy	不日更新
853	Car Fleet	35.2%	Medium	不日更新
854	K-Similar Strings	31.3%	Hard	不日更新
855	Exam Room	33.6%	Medium	不日更新
856	Score of Parentheses	53.5%	Medium	不日更新
857	Minimum Cost to Hire K Workers	44.6%	Hard	不日更新
858	Mirror Reflection	50.0%	Medium	不日更新
859	Buddy Strings	26.6%	Easy	不日更新
860	Lemonade Change	49.3%	Easy	不日更新
861	Score After Flipping Matrix	67.1%	Medium	不日更新
862	Shortest Subarray with Sum at Least K	19.7%	Hard	不日更新
863	All Nodes Distance K in Binary Tree	43.1%	Medium	不日更新
710	Random Pick with Blacklist	29.8%	Hard	不日更新
864	Shortest Path to Get All Keys	33.3%	Hard	不日更新
865	Smallest Subtree with all the Deepest Nodes	52.8%	Medium	不日更新
866	Prime Palindrome	18.3%	Medium	不日更新
867	Transpose Matrix	63.3%	Easy	不日更新
868	Binary Gap	58.8%	Easy	不日更新
869	Reordered Power of 2	48.0%	Medium	不日更新
870	Advantage Shuffle	40.0%	Medium	不日更新
871	Minimum Number of Refueling Stops	26.6%	Hard	不日更新
470	Implement Rand10() Using Rand7()	42.9%	Medium	不日更新
872	Leaf-Similar Trees	60.5%	Easy	不日更新
873	Length of Longest Fibonacci Subsequence	42.4%	Medium	不日更新
874	Walking Robot Simulation	28.4%	Easy	不日更新
875	Koko Eating Bananas	42.6%	Medium	不日更新
876	Middle of the Linked List	62.7%	Easy	不日更新
877	Stone Game	58.1%	Medium	不日更新
878	Nth Magical Number	23.5%	Hard	不日更新
879	Profitable Schemes	33.8%	Hard	不日更新
528	Random Pick with Weight	41.7%	Medium	不日更新
519	Random Flip Matrix	32.3%	Medium	不日更新
497	Random Point in Non-overlapping Rectangles	33.2%	Medium	不日更新
478	Generate Random Point in a Circle	33.8%	Medium	不日更新
880	Decoded String at Index	22.4%	Medium	不日更新
881	Boats to Save People	39.8%	Medium	不日更新
882	Reachable Nodes In Subdivided Graph	34.5%	Hard	不日更新
883	Projection Area of 3D Shapes	64.6%	Easy	不日更新
884	Uncommon Words from Two Sentences	59.8%	Easy	不日更新
885	Spiral Matrix III	62.8%	Medium	不日更新
886	Possible Bipartition	38.7%	Medium	不日更新
887	Super Egg Drop	23.3%	Hard	不日更新
888	Fair Candy Swap	53.6%	Easy	不日更新
889	Construct Binary Tree from Preorder and Postorder Traversal	55.4%	Medium	不日更新
890	Find and Replace Pattern	68.8%	Medium	不日更新
891	Sum of Subsequence Widths	25.6%	Hard	不日更新
892	Surface Area of 3D Shapes	54.7%	Easy	不日更新
893	Groups of Special-Equivalent Strings	60.5%	Easy	不日更新
894	All Possible Full Binary Trees	65.9%	Medium	不日更新
895	Maximum Frequency Stack	48.2%	Hard	不日更新
896	Monotonic Array	54.6%	Easy	不日更新
897	Increasing Order Search Tree	57.8%	Easy	不日更新
898	Bitwise ORs of Subarrays	31.5%	Medium	不日更新
899	Orderly Queue	43.0%	Hard	不日更新
900	RLE Iterator	43.8%	Medium	不日更新
901	Online Stock Span	43.7%	Medium	不日更新
902	Numbers At Most N Given Digit Set	26.1%	Hard	不日更新
903	Valid Permutations for DI Sequence	39.6%	Hard	不日更新
904	Fruit Into Baskets	39.1%	Medium	不日更新
905	Sort Array By Parity	70.8%	Easy	不日更新
906	Super Palindromes	29.1%	Hard	不日更新
907	Sum of Subarray Minimums	21.6%	Medium	不日更新
908	Smallest Range I	63.4%	Easy	不日更新
909	Snakes and Ladders	26.1%	Medium	不日更新
910	Smallest Range II	19.6%	Medium	不日更新
911	Online Election	43.0%	Medium	不日更新
913	Cat and Mouse	23.0%	Hard	不日更新
914	X of a Kind in a Deck of Cards	33.0%	Easy	不日更新
915	Partition Array into Disjoint Intervals	40.0%	Medium	不日更新
916	Word Subsets	43.1%	Medium	不日更新
917	Reverse Only Letters	56.2%	Easy	不日更新
918	Maximum Sum Circular Subarray	26.2%	Medium	不日更新
919	Complete Binary Tree Inserter	53.5%	Medium	不日更新
920	Number of Music Playlists	40.4%	Hard	不日更新
921	Minimum Add to Make Parentheses Valid	69.8%	Medium	不日更新
922	Sort Array By Parity II	66.6%	Easy	不日更新
923	3Sum With Multiplicity	28.3%	Medium	不日更新
924	Minimize Malware Spread	35.5%	Hard	不日更新
925	Long Pressed Name	44.4%	Easy	不日更新
926	Flip String to Monotone Increasing	43.3%	Medium	不日更新
927	Three Equal Parts	26.8%	Hard	不日更新
928	Minimize Malware Spread II	36.9%	Hard	不日更新
929	Unique Email Addresses	79.7%	Easy	不日更新
930	Binary Subarrays With Sum	33.5%	Medium	不日更新
931	Minimum Falling Path Sum	55.4%	Medium	不日更新
932	Beautiful Array	45.1%	Medium	不日更新
933	Number of Recent Calls	63.0%	Easy	不日更新
934	Shortest Bridge	42.1%	Medium	不日更新
935	Knight Dialer	33.6%	Medium	不日更新
936	Stamping The Sequence	26.7%	Hard	不日更新