LeetCode All in One题解汇总（持续更新中...）

突然很想刷刷题，LeetCode是一个不错的选择，忽略了输入输出，更好的突出了算法，省去了不少时间。

dalao们发现了任何错误，或是代码无法通过，或是有更好的解法，或是有任何疑问和建议的话，可以在对应的随笔下面评论区留言，我会及时处理，在此谢过了。

过程或许会很漫长，也很痛苦，慢慢来吧。

编号	题名	过题率	难度
1	Two Sum	0.376	Easy
2	Add Two Numbers	0.285	Medium
3	Longest Substring Without Repeating Characters	0.247	Medium
4	Median of Two Sorted Arrays	0.229	Hard
5	Longest Palindromic Substring	0.252	Medium
6	ZigZag Conversion	0.272	Medium
7	Reverse Integer	0.244	Easy
8	String to Integer (atoi)	0.140	Medium
9	Palindrome Number	0.357	Easy
10	Regular Expression Matching	0.243	Hard
11	Container With Most Water	0.371	Medium
12	Integer to Roman	0.461	Medium
13	Roman to Integer	0.478	Easy
14	Longest Common Prefix	0.316	Easy
15	3Sum	0.218	Medium
16	3Sum Closest	0.316	Medium
17	Letter Combinations of a Phone Number	0.363	Medium
18	4Sum	0.275	Medium
19	Remove Nth Node From End of List	0.340	Medium
20	Valid Parentheses	0.339	Easy
21	Merge Two Sorted Lists	0.408	Easy
22	Generate Parentheses	0.477	Medium
23	Merge k Sorted Lists	0.280	Hard
24	Swap Nodes in Pairs	0.390	Medium
25	Reverse Nodes in k-Group	0.315	Hard
26	Remove Duplicates from Sorted Array	0.362	Easy
27	Remove Element	0.406	Easy
28	Implement strStr()	0.289	Easy
29	Divide Two Integers	0.158	Medium
30	Substring with Concatenation of All Words	0.223	Hard
31	Next Permutation	0.290	Medium
32	Longest Valid Parentheses	0.232	Hard
33	Search in Rotated Sorted Array	0.319	Medium
34	Search for a Range	0.316	Medium
35	Search Insert Position	0.400	Easy
36	Valid Sudoku	0.374	Medium
37	Sudoku Solver	0.319	Hard
38	Count and Say	0.366	Easy
39	Combination Sum	0.411	Medium
40	Combination Sum II	0.357	Medium
41	First Missing Positive	0.258	Hard
42	Trapping Rain Water	0.375	Hard
43	Multiply Strings	0.279	Medium
44	Wildcard Matching	0.209	Hard
45	Jump Game II	0.261	Hard
46	Permutations	0.469	Medium
47	Permutations II	0.348	Medium
48	Rotate Image	0.415	Medium
49	Group Anagrams	0.381	Medium
50	Pow(x, n)	0.260	Medium
51	N-Queens	0.331	Hard
52	N-Queens II	0.466	Hard
53	Maximum Subarray	0.402	Easy
54	Spiral Matrix	0.271	Medium
55	Jump Game	0.295	Medium
56	Merge Intervals	0.318	Medium
57	Insert Interval	0.289	Hard
58	Length of Last Word	0.320	Easy
59	Spiral Matrix II	0.409	Medium
60	Permutation Sequence	0.294	Medium
61	Rotate List	0.244	Medium
62	Unique Paths	0.426	Medium
63	Unique Paths II	0.321	Medium
64	Minimum Path Sum	0.404	Medium
65	Valid Number	0.129	Hard
66	Plus One	0.396	Easy
67	Add Binary	0.339	Easy
68	Text Justification	0.199	Hard
69	Sqrt(x)	0.288	Easy
70	Climbing Stairs	0.411	Easy
71	Simplify Path	0.262	Medium
72	Edit Distance	0.325	Hard
73	Set Matrix Zeroes	0.365	Medium
74	Search a 2D Matrix	0.347	Medium
75	Sort Colors	0.388	Medium
76	Minimum Window Substring	0.267	Hard
77	Combinations	0.411	Medium
78	Subsets	0.443	Medium
79	Word Search	0.280	Medium
80	Remove Duplicates from Sorted Array II	0.367	Medium
81	Search in Rotated Sorted Array II	0.327	Medium
82	Remove Duplicates from Sorted List II	0.299	Medium
83	Remove Duplicates from Sorted List	0.402	Easy
84	Largest Rectangle in Histogram	0.275	Hard
85	Maximal Rectangle	0.295	Hard
86	Partition List	0.334	Medium
87	Scramble String	0.297	Hard
88	Merge Sorted Array	0.321	Easy
89	Gray Code	0.423	Medium
90	Subsets II	0.381	Medium
91	Decode Ways	0.203	Medium
92	Reverse Linked List II	0.313	Medium
93	Restore IP Addresses	0.284	Medium
94	Binary Tree Inorder Traversal	0.493	Medium
95	Unique Binary Search Trees II	0.322	Medium
96	Unique Binary Search Trees	0.418	Medium
97	Interleaving String	0.251	Hard
98	Validate Binary Search Tree	0.240	Medium
99	Recover Binary Search Tree	0.309	Hard
100	Same Tree	0.477	Easy
101	Symmetric Tree	0.402	Easy
102	Binary Tree Level Order Traversal	0.423	Medium
103	Binary Tree Zigzag Level Order Traversal	0.366	Medium
104	Maximum Depth of Binary Tree	0.545	Easy
105	Construct Binary Tree from Preorder and Inorder Traversal	0.338	Medium
106	Construct Binary Tree from Inorder and Postorder Traversal	0.333	Medium
107	Binary Tree Level Order Traversal II	0.419	Easy
108	Convert Sorted Array to Binary Search Tree	0.442	Easy
109	Convert Sorted List to Binary Search Tree	0.355	Medium
110	Balanced Binary Tree	0.383	Easy
111	Minimum Depth of Binary Tree	0.335	Easy
112	Path Sum	0.348	Easy
113	Path Sum II	0.354	Medium
114	Flatten Binary Tree to Linked List	0.364	Medium
115	Distinct Subsequences	0.322	Hard
116	Populating Next Right Pointers in Each Node	0.369	Medium
117	Populating Next Right Pointers in Each Node II	0.339	Medium
118	Pascal's Triangle	0.399	Easy
119	Pascal's Triangle II	0.381	Easy
120	Triangle	0.348	Medium
121	Best Time to Buy and Sell Stock	0.428	Easy
122	Best Time to Buy and Sell Stock II	0.478	Easy
123	Best Time to Buy and Sell Stock III	0.303	Hard
124	Binary Tree Maximum Path Sum	0.271	Hard
125	Valid Palindrome	0.269	Easy
126	Word Ladder II	0.148	Hard
127	Word Ladder	0.200	Medium
128	Longest Consecutive Sequence	0.381	Hard
129	Sum Root to Leaf Numbers	0.376	Medium
130	Surrounded Regions	0.195	Medium
131	Palindrome Partitioning	0.354	Medium
132	Palindrome Partitioning II	0.248	Hard
133	Clone Graph	0.252	Medium
134	Gas Station	0.299	Medium
135	Candy	0.252	Hard
136	Single Number	0.553	Easy
137	Single Number II	0.426	Medium
138	Copy List with Random Pointer	0.259	Medium
139	Word Break	0.314	Medium
140	Word Break II	0.244	Hard
141	Linked List Cycle	0.351	Easy
142	Linked List Cycle II	0.307	Medium
143	Reorder List	0.267	Medium
144	Binary Tree Preorder Traversal	0.466	Medium
145	Binary Tree Postorder Traversal	0.419	Hard
146	LRU Cache	0.196	Hard
147	Insertion Sort List	0.338	Medium
148	Sort List	0.297	Medium
149	Max Points on a Line	0.152	Hard
150	Evaluate Reverse Polish Notation	0.283	Medium
151	Reverse Words in a String	0.156	Medium
152	Maximum Product Subarray	0.267	Medium
153	Find Minimum in Rotated Sorted Array	0.407	Medium
154	Find Minimum in Rotated Sorted Array II	0.378	Hard
155	Min Stack	0.309	Easy
156	Binary Tree Upside Down	0.458	Medium
157	Read N Characters Given Read4	0.290	Easy
158	Read N Characters Given Read4 II - Call multiple times	0.248	Hard
159	Longest Substring with At Most Two Distinct Characters	0.427	Hard
160	Intersection of Two Linked Lists	0.309	Easy
161	One Edit Distance	0.317	Medium
162	Find Peak Element	0.388	Medium
163	Missing Ranges	0.233	Medium
164	Maximum Gap	0.300	Hard
165	Compare Version Numbers	0.207	Medium
166	Fraction to Recurring Decimal	0.181	Medium
167	Two Sum II - Input array is sorted	0.473	Easy
168	Excel Sheet Column Title	0.272	Easy
169	Majority Element	0.479	Easy
170	Two Sum III - Data structure design	0.262	Easy
171	Excel Sheet Column Number	0.484	Easy
172	Factorial Trailing Zeroes	0.369	Easy
173	Binary Search Tree Iterator	0.434	Medium
174	Dungeon Game	0.241	Hard
179	Largest Number	0.234	Medium
186	Reverse Words in a String II	0.297	Medium
187	Repeated DNA Sequences	0.329	Medium
188	Best Time to Buy and Sell Stock IV	0.249	Hard
189	Rotate Array	0.252	Easy
190	Reverse Bits	0.294	Easy
191	Number of 1 Bits	0.403	Easy
198	House Robber	0.399	Easy
199	Binary Tree Right Side View	0.423	Medium
200	Number of Islands	0.364	Medium
201	Bitwise AND of Numbers Range	0.344	Medium
202	Happy Number	0.414	Easy
203	Remove Linked List Elements	0.333	Easy
204	Count Primes	0.265	Easy
205	Isomorphic Strings	0.346	Easy
206	Reverse Linked List	0.467	Easy
207	Course Schedule	0.336	Medium
208	Implement Trie (Prefix Tree)	0.306	Medium
209	Minimum Size Subarray Sum	0.320	Medium
210	Course Schedule II	0.300	Medium
211	Add and Search Word - Data structure design	0.251	Medium
212	Word Search II	0.246	Hard
213	House Robber II	0.346	Medium
214	Shortest Palindrome	0.251	Hard
215	Kth Largest Element in an Array	0.405	Medium
216	Combination Sum III	0.470	Medium
217	Contains Duplicate	0.469	Easy
218	The Skyline Problem	0.289	Hard
219	Contains Duplicate II	0.328	Easy
220	Contains Duplicate III	0.188	Medium
221	Maximal Square	0.302	Medium
222	Count Complete Tree Nodes	0.277	Medium
223	Rectangle Area	0.337	Medium
224	Basic Calculator	0.285	Hard
225	Implement Stack using Queues	0.342	Easy
226	Invert Binary Tree	0.531	Easy
227	Basic Calculator II	0.300	Medium
228	Summary Ranges	0.319	Medium
229	Majority Element II	0.291	Medium
230	Kth Smallest Element in a BST	0.452	Medium
231	Power of Two	0.407	Easy
232	Implement Queue using Stacks	0.380	Easy
233	Number of Digit One	0.290	Hard
234	Palindrome Linked List	0.334	Easy
235	Lowest Common Ancestor of a Binary Search Tree	0.397	Easy
236	Lowest Common Ancestor of a Binary Tree	0.300	Medium
237	Delete Node in a Linked List	0.472	Easy
238	Product of Array Except Self	0.503	Medium
239	Sliding Window Maximum	0.341	Hard
240	Search a 2D Matrix II	0.391	Medium
241	Different Ways to Add Parentheses	0.459	Medium
242	Valid Anagram	0.474	Easy
243	Shortest Word Distance	0.534	Easy
244	Shortest Word Distance II	0.410	Medium
245	Shortest Word Distance III	0.512	Medium
246	Strobogrammatic Number	0.403	Easy
247	Strobogrammatic Number II	0.409	Medium
248	Strobogrammatic Number III	0.327	Hard
249	Group Shifted Strings	0.440	Medium
250	Count Univalue Subtrees	0.438	Medium
251	Flatten 2D Vector	0.413	Medium
252	Meeting Rooms	0.488	Easy
253	Meeting Rooms II	0.394	Medium
254	Factor Combinations	0.439	Medium
255	Verify Preorder Sequence in Binary Search Tree	0.409	Medium
256	Paint House	0.462	Easy
257	Binary Tree Paths	0.410	Easy
258	Add Digits	0.518	Easy
259	3Sum Smaller	0.420	Medium
260	Single Number III	0.530	Medium
261	Graph Valid Tree	0.384	Medium
263	Ugly Number	0.396	Easy
264	Ugly Number II	0.333	Medium
265	Paint House II	0.384	Hard
266	Palindrome Permutation	0.581	Easy
267	Palindrome Permutation II	0.321	Medium
268	Missing Number	0.449	Easy
269	Alien Dictionary	0.261	Hard
270	Closest Binary Search Tree Value	0.406	Easy
271	Encode and Decode Strings	0.260	Medium
272	Closest Binary Search Tree Value II	0.399	Hard
273	Integer to English Words	0.227	Hard
274	H-Index	0.337	Medium
275	H-Index II	0.349	Medium
276	Paint Fence	0.349	Easy
277	Find the Celebrity	0.356	Medium
278	First Bad Version	0.260	Easy
279	Perfect Squares	0.377	Medium
280	Wiggle Sort	0.585	Medium
281	Zigzag Iterator	0.524	Medium
282	Expression Add Operators	0.306	Hard
283	Move Zeroes	0.514	Easy
284	Peeking Iterator	0.356	Medium
285	Inorder Successor in BST	0.357	Medium
286	Walls and Gates	0.453	Medium
287	Find the Duplicate Number	0.442	Medium
288	Unique Word Abbreviation	0.178	Medium
289	Game of Life	0.373	Medium
290	Word Pattern	0.334	Easy
291	Word Pattern II	0.385	Hard
292	Nim Game	0.554	Easy
293	Flip Game	0.571	Easy
294	Flip Game II	0.469	Medium
295	Find Median from Data Stream	0.292	Hard
296	Best Meeting Point	0.524	Hard
297	Serialize and Deserialize Binary Tree	0.348	Hard
298	Binary Tree Longest Consecutive Sequence	0.417	Medium
299	Bulls and Cows	0.358	Medium
300	Longest Increasing Subsequence	0.389	Medium
301	Remove Invalid Parentheses	0.359	Hard
302	Smallest Rectangle Enclosing Black Pixels	0.466	Hard
303	Range Sum Query - Immutable	0.319	Easy
304	Range Sum Query 2D - Immutable	0.270	Medium
305	Number of Islands II	0.396	Hard
306	Additive Number	0.277	Medium
307	Range Sum Query - Mutable	0.223	Medium
308	Range Sum Query 2D - Mutable	0.256	Hard
309	Best Time to Buy and Sell Stock with Cooldown	0.419	Medium
310	Minimum Height Trees	0.290	Medium
311	Sparse Matrix Multiplication	0.524	Medium
312	Burst Balloons	0.437	Hard
313	Super Ugly Number	0.383	Medium
314	Binary Tree Vertical Order Traversal	0.379	Medium
315	Count of Smaller Numbers After Self	0.350	Hard
316	Remove Duplicate Letters	0.303	Hard
317	Shortest Distance from All Buildings	0.348	Hard
318	Maximum Product of Word Lengths	0.455	Medium
319	Bulb Switcher	0.430	Medium
320	Generalized Abbreviation	0.462	Medium
321	Create Maximum Number	0.248	Hard
322	Coin Change	0.266	Medium
323	Number of Connected Components in an Undirected Graph	0.488	Medium
324	Wiggle Sort II	0.264	Medium
325	Maximum Size Subarray Sum Equals k	0.432	Medium
326	Power of Three	0.407	Easy
327	Count of Range Sum	0.306	Hard
328	Odd Even Linked List	0.446	Medium
329	Longest Increasing Path in a Matrix	0.374	Hard
330	Patching Array	0.326	Hard
331	Verify Preorder Serialization of a Binary Tree	0.370	Medium
332	Reconstruct Itinerary	0.298	Medium
333	Largest BST Subtree	0.310	Medium
334	Increasing Triplet Subsequence	0.398	Medium
335	Self Crossing	0.261	Hard
336	Palindrome Pairs	0.271	Hard
337	House Robber III	0.446	Medium
338	Counting Bits	0.621	Medium
339	Nested List Weight Sum	0.637	Easy
340	Longest Substring with At Most K Distinct Characters	0.388	Hard
341	Flatten Nested List Iterator	0.431	Medium
342	Power of Four	0.390	Easy
343	Integer Break	0.465	Medium
344	Reverse String	0.602	Easy
345	Reverse Vowels of a String	0.391	Easy
346	Moving Average from Data Stream	0.601	Easy
347	Top K Frequent Elements	0.495	Medium
348	Design Tic-Tac-Toe	0.460	Medium
349	Intersection of Two Arrays	0.481	Easy
350	Intersection of Two Arrays II	0.445	Easy
351	Android Unlock Patterns	0.446	Medium
352	Data Stream as Disjoint Intervals	0.409	Hard
353	Design Snake Game	0.272	Medium
354	Russian Doll Envelopes	0.325	Hard
355	Design Twitter	0.258	Medium
356	Line Reflection	0.303	Medium
357	Count Numbers with Unique Digits	0.461	Medium
358	Rearrange String k Distance Apart	0.317	Hard
359	Logger Rate Limiter	0.606	Easy
360	Sort Transformed Array	0.449	Medium
361	Bomb Enemy	0.401	Medium
362	Design Hit Counter	0.552	Medium
363	Max Sum of Rectangle No Larger Than K	0.337	Hard
364	Nested List Weight Sum II	0.539	Medium
365	Water and Jug Problem	0.280	Medium
366	Find Leaves of Binary Tree	0.611	Medium
367	Valid Perfect Square	0.386	Easy
368	Largest Divisible Subset	0.339	Medium
369	Plus One Linked List	0.551	Medium
370	Range Addition	0.571	Medium
371	Sum of Two Integers	0.509	Easy
372	Super Pow	0.346	Medium
373	Find K Pairs with Smallest Sums	0.312	Medium
374	Guess Number Higher or Lower	0.365	Easy
375	Guess Number Higher or Lower II	0.361	Medium
376	Wiggle Subsequence	0.361	Medium
377	Combination Sum IV	0.427	Medium
378	Kth Smallest Element in a Sorted Matrix	0.455	Medium
379	Design Phone Directory	0.358	Medium
380	Insert Delete GetRandom O(1)	0.399	Medium
381	Insert Delete GetRandom O(1) - Duplicates allowed	0.295	Hard
382	Linked List Random Node	0.475	Medium
383	Ransom Note	0.477	Easy
384	Shuffle an Array	0.473	Medium
385	Mini Parser	0.309	Medium
386	Lexicographical Numbers	0.422	Medium
387	First Unique Character in a String	0.472	Easy
388	Longest Absolute File Path	0.372	Medium
389	Find the Difference	0.512	Easy
390	Elimination Game	0.427	Medium
391	Perfect Rectangle	0.274	Hard
392	Is Subsequence	0.447	Medium
393	UTF-8 Validation	0.347	Medium
394	Decode String	0.421	Medium
395	Longest Substring with At Least K Repeating Characters	0.358	Medium
396	Rotate Function	0.338	Medium
397	Integer Replacement	0.305	Medium
398	Random Pick Index	0.446	Medium
399	Evaluate Division	0.423	Medium
400	Nth Digit	0.302	Easy
401	Binary Watch	0.448	Easy
402	Remove K Digits	0.260	Medium
403	Frog Jump	0.325	Hard
404	Sum of Left Leaves	0.475	Easy
405	Convert a Number to Hexadecimal	0.411	Easy
406	Queue Reconstruction by Height	0.566	Medium
407	Trapping Rain Water II	0.379	Hard
408	Valid Word Abbreviation	0.283	Easy
409	Longest Palindrome	0.458	Easy
410	Split Array Largest Sum	0.393	Hard
411	Minimum Unique Word Abbreviation	0.337	Hard
412	Fizz Buzz	0.581	Easy
413	Arithmetic Slices	0.546	Medium
414	Third Maximum Number	0.280	Easy
415	Add Strings	0.417	Easy
416	Partition Equal Subset Sum	0.389	Medium
417	Pacific Atlantic Water Flow	0.346	Medium
418	Sentence Screen Fitting	0.281	Medium
419	Battleships in a Board	0.629	Medium
420	Strong Password Checker	0.200	Hard
421	Maximum XOR of Two Numbers in an Array	0.479	Medium
422	Valid Word Square	0.365	Easy
423	Reconstruct Original Digits from English	0.446	Medium
424	Longest Repeating Character Replacement	0.427	Medium
425	Word Squares	0.431	Hard
432	All O`one Data Structure	0.279	Hard
434	Number of Segments in a String	0.367	Easy
435	Non-overlapping Intervals	0.413	Medium
436	Find Right Interval	0.415	Medium
437	Path Sum III	0.401	Easy
438	Find All Anagrams in a String	0.339	Easy
439	Ternary Expression Parser	0.513	Medium
440	K-th Smallest in Lexicographical Order	0.256	Hard
441	Arranging Coins	0.363	Easy
442	Find All Duplicates in an Array	0.567	Medium
443	String Compression	0.363	Easy
444	Sequence Reconstruction	0.196	Medium
445	Add Two Numbers II	0.462	Medium
446	Arithmetic Slices II - Subsequence	0.280	Hard
447	Number of Boomerangs	0.465	Easy
448	Find All Numbers Disappeared in an Array	0.512	Easy
449	Serialize and Deserialize BST	0.429	Medium
450	Delete Node in a BST	0.376	Medium
451	Sort Characters By Frequency	0.517	Medium
452	Minimum Number of Arrows to Burst Balloons	0.445	Medium
453	Minimum Moves to Equal Array Elements	0.480	Easy
454	4Sum II	0.477	Medium
455	Assign Cookies	0.472	Easy
456	132 Pattern	0.280	Medium
459	Repeated Substring Pattern	0.381	Easy
460	LFU Cache	0.250	Hard
461	Hamming Distance	0.696	Easy
462	Minimum Moves to Equal Array Elements II	0.519	Medium
463	Island Perimeter	0.578	Easy
464	Can I Win	0.252	Medium
465	Optimal Account Balancing	0.390	Hard
466	Count The Repetitions	0.273	Hard
467	Unique Substrings in Wraparound String	0.332	Medium
468	Validate IP Address	0.206	Medium
469	Convex Polygon	0.342	Medium
471	Encode String with Shortest Length	0.431	Hard
472	Concatenated Words	0.308	Hard
473	Matchsticks to Square	0.354	Medium
474	Ones and Zeroes	0.389	Medium
475	Heaters	0.297	Easy
476	Number Complement	0.610	Easy
477	Total Hamming Distance	0.477	Medium
479	Largest Palindrome Product	0.254	Easy
480	Sliding Window Median	0.307	Hard
481	Magical String	0.458	Medium
482	License Key Formatting	0.398	Easy
483	Smallest Good Base	0.336	Hard
484	Find Permutation	0.552	Medium
485	Max Consecutive Ones	0.538	Easy
486	Predict the Winner	0.452	Medium
487	Max Consecutive Ones II	0.459	Medium
488	Zuma Game	0.370	Hard
490	The Maze	0.434	Medium
491	Increasing Subsequences	0.388	Medium
492	Construct the Rectangle	0.480	Easy
493	Reverse Pairs	0.209	Hard
494	Target Sum	0.438	Medium
495	Teemo Attacking	0.515	Medium
496	Next Greater Element I	0.565	Easy
498	Diagonal Traverse	0.463	Medium
499	The Maze III	0.338	Hard
500	Keyboard Row	0.598	Easy
501	Find Mode in Binary Search Tree	0.376	Easy
502	IPO	0.365	Hard
503	Next Greater Element II	0.480	Medium
504	Base 7	0.440	Easy
505	The Maze II	0.387	Medium
506	Relative Ranks	0.468	Easy
507	Perfect Number	0.326	Easy
508	Most Frequent Subtree Sum	0.523	Medium
513	Find Bottom Left Tree Value	0.560	Medium
514	Freedom Trail	0.391	Hard
515	Find Largest Value in Each Tree Row	0.553	Medium
516	Longest Palindromic Subsequence	0.428	Medium
517	Super Washing Machines	0.363	Hard
520	Detect Capital	0.519	Easy
521	Longest Uncommon Subsequence I	0.557	Easy
522	Longest Uncommon Subsequence II	0.320	Medium
523	Continuous Subarray Sum	0.233	Medium
524	Longest Word in Dictionary through Deleting	0.432	Medium
525	Contiguous Array	0.414	Medium
526	Beautiful Arrangement	0.533	Medium
527	Word Abbreviation	0.441	Hard
529	Minesweeper	0.494	Medium
530	Minimum Absolute Difference in BST	0.472	Easy
531	Lonely Pixel I	0.563	Medium
532	K-diff Pairs in an Array	0.282	Easy
533	Lonely Pixel II	0.450	Medium
535	Encode and Decode TinyURL	0.739	Medium
536	Construct Binary Tree from String	0.425	Medium
537	Complex Number Multiplication	0.637	Medium
538	Convert BST to Greater Tree	0.489	Easy
539	Minimum Time Difference	0.460	Medium
540	Single Element in a Sorted Array	0.559	Medium
541	Reverse String II	0.438	Easy
542	01 Matrix	0.329	Medium
543	Diameter of Binary Tree	0.450	Easy
544	Output Contest Matches	0.717	Medium
545	Boundary of Binary Tree	0.325	Medium
546	Remove Boxes	0.350	Hard
547	Friend Circles	0.491	Medium
548	Split Array with Equal Sum	0.377	Medium
549	Binary Tree Longest Consecutive Sequence II	0.429	Medium
551	Student Attendance Record I	0.445	Easy
552	Student Attendance Record II	0.315	Hard
553	Optimal Division	0.552	Medium
554	Brick Wall	0.463	Medium
555	Split Concatenated Strings	0.380	Medium
556	Next Greater Element III	0.290	Medium
557	Reverse Words in a String III	0.601	Easy
560	Subarray Sum Equals K	0.402	Medium
561	Array Partition I	0.664	Easy
562	Longest Line of Consecutive One in Matrix	0.413	Medium
563	Binary Tree Tilt	0.472	Easy
564	Find the Closest Palindrome	0.175	Hard
565	Array Nesting	0.494	Medium
566	Reshape the Matrix	0.579	Easy
567	Permutation in String	0.363	Medium
568	Maximum Vacation Days	0.374	Hard
572	Subtree of Another Tree	0.402	Easy
573	Squirrel Simulation	0.523	Medium
575	Distribute Candies	0.580	Easy
576	Out of Boundary Paths	0.306	Medium
581	Shortest Unsorted Continuous Subarray	0.291	Easy
582	Kill Process	0.506	Medium
583	Delete Operation for Two Strings	0.446	Medium
587	Erect the Fence	0.333	Hard
588	Design In-Memory File System	0.361	Hard
591	Tag Validator	0.309	Hard
592	Fraction Addition and Subtraction	0.461	Medium
593	Valid Square	0.398	Medium
594	Longest Harmonious Subsequence	0.411	Easy
598	Range Addition II	0.481	Easy
599	Minimum Index Sum of Two Lists	0.464	Easy
600	Non-negative Integers without Consecutive Ones	0.317	Hard
604	Design Compressed String Iterator	0.331	Easy
605	Can Place Flowers	0.301	Easy
606	Construct String from Binary Tree	0.497	Easy
609	Find Duplicate File in System	0.522	Medium
611	Valid Triangle Number	0.420	Medium
616	Add Bold Tag in String	0.381	Medium
617	Merge Two Binary Trees	0.673	Easy
621	Task Scheduler	0.425	Medium
623	Add One Row to Tree	0.461	Medium
624	Maximum Distance in Arrays	0.351	Easy
625	Minimum Factorization	0.312	Medium
628	Maximum Product of Three Numbers	0.446	Easy
629	K Inverse Pairs Array	0.270	Hard
630	Course Schedule III	0.292	Hard
631	Design Excel Sum Formula	0.279	Hard
632	Smallest Range	0.421	Hard
633	Sum of Square Numbers	0.323	Easy
634	Find the Derangement of An Array	0.356	Medium
635	Design Log Storage System	0.494	Medium
636	Exclusive Time of Functions	0.446	Medium
637	Average of Levels in Binary Tree	0.557	Easy
638	Shopping Offers	0.448	Medium
639	Decode Ways II	0.245	Hard
640	Solve the Equation	0.387	Medium
642	Design Search Autocomplete System	0.310	Hard
643	Maximum Average Subarray I	0.375	Easy
644	Maximum Average Subarray II	0.246	Hard
645	Set Mismatch	0.397	Easy
646	Maximum Length of Pair Chain	0.474	Medium
647	Palindromic Substrings	0.550	Medium
648	Replace Words	0.476	Medium
649	Dota2 Senate	0.365	Medium
650	2 Keys Keyboard	0.449	Medium
651	4 Keys Keyboard	0.496	Medium
652	Find Duplicate Subtrees	0.372	Medium
653	Two Sum IV - Input is a BST	0.500	Easy
654	Maximum Binary Tree	0.697	Medium
655	Print Binary Tree	0.494	Medium
656	Coin Path	0.257	Hard
657	Judge Route Circle	0.684	Easy
658	Find K Closest Elements	0.352	Medium
659	Split Array into Consecutive Subsequences	0.369	Medium
660	Remove 9	0.493	Hard
661	Image Smoother	0.461	Easy
662	Maximum Width of Binary Tree	0.379	Medium
663	Equal Tree Partition	0.366	Medium
664	Strange Printer	0.337	Hard
665	Non-decreasing Array	0.203	Easy
666	Path Sum IV	0.503	Medium
667	Beautiful Arrangement II	0.515	Medium
668	Kth Smallest Number in Multiplication Table	0.398	Hard
669	Trim a Binary Search Tree	0.582	Easy
670	Maximum Swap	0.385	Medium
671	Second Minimum Node In a Binary Tree	0.418	Easy
672	Bulb Switcher II	0.493	Medium
673	Number of Longest Increasing Subsequence	0.316	Medium
674	Longest Continuous Increasing Subsequence	0.423	Easy
675	Cut Off Trees for Golf Event	0.269	Hard
676	Implement Magic Dictionary	0.494	Medium
677	Map Sum Pairs	0.518	Medium
678	Valid Parenthesis String	0.293	Medium
679	24 Game	0.385	Hard
680	Valid Palindrome II	0.323	Easy
681	Next Closest Time	0.421	Medium
682	Baseball Game	0.579	Easy
683	K Empty Slots	0.349	Hard
684	Redundant Connection	0.432	Medium
685	Redundant Connection II	0.279	Hard
686	Repeated String Match	0.326	Easy
687	Longest Univalue Path	0.330	Easy
688	Knight Probability in Chessboard	0.395	Medium
689	Maximum Sum of 3 Non-Overlapping Subarrays	0.409	Hard
690	Employee Importance	0.517	Easy
691	Stickers to Spell Word	0.347	Hard
692	Top K Frequent Words	0.412	Medium
693	Binary Number with Alternating Bits	0.557	Easy
694	Number of Distinct Islands	0.450	Medium
695	Max Area of Island	0.517	Easy
696	Count Binary Substrings	0.506	Easy
697	Degree of an Array	0.468	Easy
698	Partition to K Equal Sum Subsets	0.375	Medium
699	Falling Squares	0.367	Hard
711	Number of Distinct Islands II	0.416	Hard
712	Minimum ASCII Delete Sum for Two Strings	0.512	Medium
713	Subarray Product Less Than K	0.330	Medium
714	Best Time to Buy and Sell Stock with Transaction Fee	0.451	Medium
715	Range Module	0.318	Hard
716	Max Stack	0.370	Hard
717	1-bit and 2-bit Characters	0.495	Easy
718	Maximum Length of Repeated Subarray	0.410	Medium
719	Find K-th Smallest Pair Distance	0.271	Hard
720	Longest Word in Dictionary	0.413	Easy
721	Accounts Merge	0.325	Medium
722	Remove Comments	0.279	Medium
723	Candy Crush	0.552	Medium
724	Find Pivot Index	0.395	Easy
725	Split Linked List in Parts	0.474	Medium
726	Number of Atoms	0.442	Hard
727	Minimum Window Subsequence	0.311	Hard
728	Self Dividing Numbers	0.667	Easy
729	My Calendar I	0.422	Medium
730	Count Different Palindromic Subsequences	0.352	Hard
731	My Calendar II	0.373	Medium
732	My Calendar III	0.510	Hard
733	Flood Fill	0.478	Easy
734	Sentence Similarity	0.386	Easy
735	Asteroid Collision	0.372	Medium
736	Parse Lisp Expression	0.431	Hard
737	Sentence Similarity II	0.409	Medium
738	Monotone Increasing Digits	0.413	Medium
739	Daily Temperatures	0.527	Medium
740	Delete and Earn	0.437	Medium
741	Cherry Pickup	0.231	Hard
742	Closest Leaf in a Binary Tree	0.334	Medium
743	Network Delay Time	0.342	Medium
744	Find Smallest Letter Greater Than Target	0.444	Easy
745	Prefix and Suffix Search	0.248	Hard
746	Min Cost Climbing Stairs	0.433	Easy
747	Largest Number At Least Twice of Others	0.417	Easy
748	Shortest Completing Word	0.525	Medium
749	Contain Virus	0.388	Hard
750	Number Of Corner Rectangles	0.526	Medium
751	IP to CIDR	0.548	Easy
752	Open the Lock	0.380	Medium
753	Cracking the Safe	0.396	Hard
754	Reach a Number	0.259	Medium
755	Pour Water	0.337	Medium
756	Pyramid Transition Matrix	0.451	Medium
757	Set Intersection Size At Least Two	0.343	Hard
758	Bold Words in String	0.371	Easy
759	Employee Free Time	0.517	Hard
760	Find Anagram Mappings	0.753	Easy
761	Special Binary String	0.400	Hard
762	Prime Number of Set Bits in Binary Representation	0.548	Easy
763	Partition Labels	0.641	Medium
764	Largest Plus Sign	0.362	Medium
765	Couples Holding Hands	0.479	Hard
766	Toeplitz Matrix	0.578	Easy
767	Reorganize String	0.355	Medium
768	Max Chunks To Make Sorted II	0.421	Hard
769	Max Chunks To Make Sorted	0.473	Medium
770	Basic Calculator IV	0.427	Hard
771	Jewels and Stones	0.824	Easy
772	Basic Calculator III	0.375	Hard
773	Sliding Puzzle	0.470	Hard
774	Minimize Max Distance to Gas Station	0.290	Hard
775	Global and Local Inversions	0.310	Medium
776	Split BST	0.485	Medium
777	Swap Adjacent in LR String	0.262	Medium
778	Swim in Rising Water	0.440	Hard
779	K-th Symbol in Grammar	0.352	Medium
780	Reaching Points	0.211	Hard
781	Rabbits in Forest	0.487	Medium
782	Transform to Chessboard	0.345	Hard
783	Minimum Distance Between BST Nodes	0.471	Easy
784	Letter Case Permutation	0.515	Easy
785	Is Graph Bipartite?	0.384	Medium
786	K-th Smallest Prime Fraction	0.284	Hard
787	Cheapest Flights Within K Stops	0.310	Medium
788	Rotated Digits	0.510	Easy
789	Escape The Ghosts	0.452	Medium
790	Domino and Tromino Tiling	0.315	Medium
791	Custom Sort String	0.614	Medium
792	Number of Matching Subsequences	0.335	Medium
793	Preimage Size of Factorial Zeroes Function	0.485	Hard
794	Valid Tic-Tac-Toe State	0.270	Medium
795	Number of Subarrays with Bounded Maximum	0.387	Medium
796	Rotate String	0.677	Easy
797	All Paths From Source to Target	0.687	Medium
798	Smallest Rotation with Highest Score    New	0.285	Hard
799	Champagne Tower    New	0.272	Medium

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LeetCode All in One题解汇总（持续更新中...）

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