这是一份关于leetcode上的javascript解决方案的分析

by Vitrum @ 2018

编程10多年，积累了成吨的工具和代码片段库，可是随着javascript的大热，越来越多新知识新工具新想法不断在冲击，常常面临种种选择，这时候，会想问问自己，人生究竟应该积累些什么？

也许是时候回过头，重拾初心。

“编程的乐趣在于 折腾算法” --鲁迅（我并没有说）

---

###在线阅读 ###Github地址

---

关于算法

javascript-algorithms 是近期很火的项目，系统的介绍了经典算法在javascript中的应用和实现。

关于LeetCode

LeetCode是一个在线能力评测系统（英语：Online Judge，缩写OJ）提供程序员在面试时经常遇到的现场coding题目，这类算法题目的思考方式是可以通过练习来熟悉理解的，在练习的同时，页能增强自己的coding能力。LeetCode除了将这些题目搬到网上让程序员们可以选择不同开发语言进行线上coding之外，还有讨论区分享了解其他人的解题思路，并且对成功通过的代码进行PK，提供运算效率排名，并可以查看最高排名的代码。

LeetCode题目分：Easy，Medium，Hard三个难度，并且附有通过率，通常来说，相同难度里，通过率高的比较简单，建议大家由简入繁。从Easy入手，熟悉解题方法和常用算法

Problems list

#	Title	Solution	Acceptance	Difficulty
1	Two Sum	Solution	38.60%	Easy
2	Add Two Numbers	Solution	29.00%	Medium
7	Reverse Integer	Solution	24.40%	Easy
9	Palindrome Number	Solution	37.40%	Easy
13	Roman to Integer		48.90%	Easy
14	Longest Common Prefix	Solution	31.80%	Easy
223	Rectangle Area		34.30%	Medium
242	Valid Anagram	Solution	48.30%	Easy
771	Jewels and Stones	Solution	81.90%	Easy
3	[Longest Substring Without Repeating Characters]	Solution	24.90%	Medium
4	[Median of Two Sorted Arrays]	Solution	23.50%	Hard
5	[Longest Palindromic Substring]	Solution	25.60%	Medium
6	[ZigZag Conversion]	Solution	28.10%	Medium
8	[String to Integer (atoi)]	Solution	14.10%	Medium
10	[Regular Expression Matching]	Solution	24.40%	Hard
11	Container With Most Water	Solution	37.50%	Medium
12	Integer to Roman	Solution	47.00%	Medium
15	3Sum	Solution	21.90%	Medium
16	3Sum Closest	Solution	32.20%	Medium
17	Letter Combinations of a Phone Number	Solution	37.50%	Medium
18	4Sum	Solution	28.00%	Medium
19	Remove Nth Node From End of List	Solution	33.80%	Medium
20	Valid Parentheses	Solution	34.30%	Easy
21	Merge Two Sorted Lists	Solution	42.40%	Easy
22	Generate Parentheses	Solution	49.30%	Medium
23	Merge k Sorted Lists	Solution	29.40%	Hard
24	Swap Nodes in Pairs	Solution	40.20%	Medium
25	Reverse Nodes in k-Group	Solution	32.60%	Hard
26	Remove Duplicates from Sorted Array	Solution	37.30%	Easy
27	Remove Element	Solution	41.50%	Easy
28	Implement strStr()	Solution	29.60%	Easy
29	Divide Two Integers	Solution	15.70%	Medium
30	Substring with Concatenation of All Words	Solution	22.30%	Hard
31	Next Permutation	Solution	29.20%	Medium
32	Longest Valid Parentheses	Solution	23.50%	Hard
33	Search in Rotated Sorted Array	Solution	32.00%	Medium
34	Find First and Last Position of Element in Sorted Array	Solution	31.80%	Medium
35	Search Insert Position	Solution	40.00%	Easy
36	Valid Sudoku	Solution	38.70%	Medium
37	Sudoku Solver	Solution	33.00%	Hard
38	Count and Say	Solution	37.40%	Easy
39	Combination Sum	Solution	42.70%	Medium
40	Combination Sum II	Solution	37.10%	Medium
41	First Missing Positive	Solution	26.40%	Hard
42	Trapping Rain Water	Solution	38.50%	Hard
43	Multiply Strings	Solution	28.40%	Medium
44	Wildcard Matching	Solution	21.40%	Hard
45	Jump Game II	Solution	26.20%	Hard
46	Permutations	Solution	48.90%	Medium
47	Permutations II	Solution	36.10%	Medium
48	Rotate Image	Solution	43.20%	Medium
49	Group Anagrams	Solution	40.20%	Medium
50	"Pow(x, n)    "	Solution	26.40%	Medium
51	N-Queens	Solution	34.40%	Hard
52	N-Queens II	Solution	47.90%	Hard
53	Maximum Subarray	Solution	40.80%	Easy
54	Spiral Matrix	Solution	27.80%	Medium
55	Jump Game	Solution	30.00%	Medium
56	Merge Intervals	Solution	32.60%	Medium
57	Insert Interval	Solution	29.40%	Hard
58	Length of Last Word	Solution	32.10%	Easy
59	Spiral Matrix II	Solution	42.20%	Medium
60	Permutation Sequence	Solution	30.20%	Medium
61	Rotate List	Solution	25.00%	Medium
62	Unique Paths	Solution	43.80%	Medium
63	Unique Paths II	Solution	32.40%	Medium
64	Minimum Path Sum	Solution	42.10%	Medium
65	Valid Number	Solution	13.00%	Hard
66	Plus One	Solution	39.90%	Easy
67	Add Binary	Solution	35.10%	Easy
68	Text Justification	Solution	20.60%	Hard
69	Sqrt(x)	Solution	29.30%	Easy
70	Climbing Stairs	Solution	41.70%	Easy
71	Simplify Path	Solution	26.70%	Medium
72	Edit Distance	Solution	33.50%	Hard
73	Set Matrix Zeroes	Solution	37.20%	Medium
74	Search a 2D Matrix	Solution	34.50%	Medium
75	Sort Colors	Solution	39.60%	Medium
76	Minimum Window Substring	Solution	27.60%	Hard
77	Combinations	Solution	42.60%	Medium
78	Subsets	Solution	46.60%	Medium
79	Word Search	Solution	28.60%	Medium
80	Remove Duplicates from Sorted Array II	Solution	37.70%	Medium
81	Search in Rotated Sorted Array II	Solution	32.50%	Medium
82	Remove Duplicates from Sorted List II	Solution	30.60%	Medium
83	Remove Duplicates from Sorted List	Solution	40.60%	Easy
84	Largest Rectangle in Histogram	Solution	28.20%	Hard
85	Maximal Rectangle	Solution	30.30%	Hard
86	Partition List	Solution	34.30%	Medium
87	Scramble String	Solution	30.10%	Hard
88	Merge Sorted Array	Solution	32.80%	Easy
89	Gray Code	Solution	43.20%	Medium
90	Subsets II	Solution	39.20%	Medium
91	Decode Ways	Solution	20.70%	Medium
92	Reverse Linked List II	Solution	32.00%	Medium
93	Restore IP Addresses	Solution	29.00%	Medium
94	Binary Tree Inorder Traversal	Solution	51.30%	Medium
95	Unique Binary Search Trees II	Solution	32.90%	Medium
96	Unique Binary Search Trees	Solution	42.70%	Medium
97	Interleaving String	Solution	25.70%	Hard
98	Validate Binary Search Tree	Solution	24.30%	Medium
99	Recover Binary Search Tree	Solution	31.70%	Hard
100	Same Tree	Solution	48.20%	Easy
101	Symmetric Tree	Solution	41.00%	Easy
102	Binary Tree Level Order Traversal	Solution	43.90%	Medium
103	Binary Tree Zigzag Level Order Traversal	Solution	37.80%	Medium
104	Maximum Depth of Binary Tree	Solution	56.20%	Easy
105	Construct Binary Tree from Preorder and Inorder Traversal	Solution	35.60%	Medium
106	Construct Binary Tree from Inorder and Postorder Traversal	Solution	34.90%	Medium
107	Binary Tree Level Order Traversal II	Solution	43.20%	Easy
108	Convert Sorted Array to Binary Search Tree	Solution	45.70%	Easy
109	Convert Sorted List to Binary Search Tree	Solution	36.60%	Medium
110	Balanced Binary Tree	Solution	38.90%	Easy
111	Minimum Depth of Binary Tree	Solution	33.90%	Easy
112	Path Sum	Solution	35.50%	Easy
113	Path Sum II	Solution	36.80%	Medium
114	Flatten Binary Tree to Linked List	Solution	37.70%	Medium
115	Distinct Subsequences	Solution	32.70%	Hard
116	Populating Next Right Pointers in Each Node	Solution	36.70%	Medium
117	Populating Next Right Pointers in Each Node II	Solution	33.70%	Medium
118	Pascal's Triangle	Solution	41.30%	Easy
119	Pascal's Triangle II	Solution	39.30%	Easy
120	Triangle	Solution	35.80%	Medium
121	Best Time to Buy and Sell Stock	Solution	43.80%	Easy
122	Best Time to Buy and Sell Stock II	Solution	48.60%	Easy
123	Best Time to Buy and Sell Stock III	Solution	31.00%	Hard
124	Binary Tree Maximum Path Sum	Solution	27.60%	Hard
125	Valid Palindrome	Solution	27.90%	Easy
126	Word Ladder II	Solution	15.30%	Hard
127	Word Ladder	Solution	20.70%	Medium
128	Longest Consecutive Sequence	Solution	38.90%	Hard
129	Sum Root to Leaf Numbers	Solution	38.80%	Medium
130	Surrounded Regions	Solution	20.30%	Medium
131	Palindrome Partitioning	Solution	36.70%	Medium
132	Palindrome Partitioning II	Solution	25.30%	Hard
133	Clone Graph	Solution	25.10%	Medium
134	Gas Station	Solution	30.80%	Medium
135	Candy	Solution	25.70%	Hard
136	Single Number	Solution	56.40%	Easy
137	Single Number II	Solution	43.30%	Medium
138	Copy List with Random Pointer	Solution	25.70%	Medium
139	Word Break	Solution	32.10%	Medium
140	Word Break II	Solution	25.00%	Hard
141	Linked List Cycle	Solution	34.80%	Easy
142	Linked List Cycle II	Solution	30.20%	Medium
143	Reorder List	Solution	27.50%	Medium
144	Binary Tree Preorder Traversal	Solution	47.80%	Medium
145	Binary Tree Postorder Traversal	Solution	43.60%	Hard
146	LRU Cache	Solution	20.70%	Hard
147	Insertion Sort List	Solution	34.60%	Medium
148	Sort List	Solution	31.00%	Medium
149	Max Points on a Line	Solution	15.20%	Hard
150	Evaluate Reverse Polish Notation	Solution	29.20%	Medium
151	Reverse Words in a String	Solution	15.70%	Medium
152	Maximum Product Subarray	Solution	27.20%	Medium
153	Find Minimum in Rotated Sorted Array	Solution	41.30%	Medium
154	Find Minimum in Rotated Sorted Array II	Solution	38.20%	Hard
155	Min Stack	Solution	32.40%	Easy
156	Binary Tree Upside Down	Solution	47.00%	Medium
157	Read N Characters Given Read4	Solution	28.50%	Easy
158	Read N Characters Given Read4 II - Call multiple times	Solution	24.50%	Hard
159	Longest Substring with At Most Two Distinct Characters	Solution	43.40%	Hard
160	Intersection of Two Linked Lists	Solution	30.80%	Easy
161	One Edit Distance	Solution	31.40%	Medium
162	Find Peak Element	Solution	39.50%	Medium
163	Missing Ranges	Solution	22.90%	Medium
164	Maximum Gap	Solution	30.60%	Hard
165	Compare Version Numbers	Solution	21.20%	Medium
166	Fraction to Recurring Decimal	Solution	18.40%	Medium
167	Two Sum II - Input array is sorted	Solution	47.40%	Easy
168	Excel Sheet Column Title	Solution	27.70%	Easy
169	Majority Element	Solution	49.00%	Easy
170	Two Sum III - Data structure design	Solution	27.10%	Easy
171	Excel Sheet Column Number	Solution	49.30%	Easy
172	Factorial Trailing Zeroes	Solution	37.00%	Easy
173	Binary Search Tree Iterator	Solution	44.20%	Medium
174	Dungeon Game	Solution	24.90%	Hard
179	Largest Number	Solution	23.90%	Medium
186	Reverse Words in a String II	Solution	32.20%	Medium
187	Repeated DNA Sequences	Solution	33.70%	Medium
188	Best Time to Buy and Sell Stock IV	Solution	25.20%	Hard
189	Rotate Array	Solution	26.30%	Easy
190	Reverse Bits	Solution	29.30%	Easy
191	Number of 1 Bits	Solution	40.70%	Easy
198	House Robber	Solution	40.30%	Easy
199	Binary Tree Right Side View	Solution	43.60%	Medium
200	Number of Islands	Solution	37.50%	Medium
201	Bitwise AND of Numbers Range	Solution	34.80%	Medium
202	Happy Number	Solution	42.40%	Easy
203	Remove Linked List Elements	Solution	34.00%	Easy
204	Count Primes	Solution	26.80%	Easy
205	Isomorphic Strings	Solution	35.20%	Easy
206	Reverse Linked List	Solution	48.30%	Easy
207	Course Schedule	Solution	34.40%	Medium
208	Implement Trie (Prefix Tree)	Solution	32.40%	Medium
209	Minimum Size Subarray Sum	Solution	32.80%	Medium
210	Course Schedule II	Solution	31.10%	Medium
211	Add and Search Word - Data structure design	Solution	26.30%	Medium
212	Word Search II	Solution	25.50%	Hard
213	House Robber II	Solution	34.70%	Medium
214	Shortest Palindrome	Solution	25.60%	Hard
215	Kth Largest Element in an Array	Solution	41.90%	Medium
216	Combination Sum III	Solution	48.20%	Medium
217	Contains Duplicate	Solution	48.10%	Easy
218	The Skyline Problem	Solution	29.50%	Hard
219	Contains Duplicate II	Solution	33.30%	Easy
220	Contains Duplicate III	Solution	18.80%	Medium
221	Maximal Square	Solution	30.90%	Medium
222	Count Complete Tree Nodes	Solution	28.30%	Medium
224	Basic Calculator	Solution	29.30%	Hard
225	Implement Stack using Queues	Solution	35.20%	Easy
226	Invert Binary Tree	Solution	54.40%	Easy
227	Basic Calculator II	Solution	30.60%	Medium
228	Summary Ranges	Solution	33.10%	Medium
229	Majority Element II	Solution	29.80%	Medium
230	Kth Smallest Element in a BST	Solution	46.50%	Medium
231	Power of Two	Solution	41.00%	Easy
232	Implement Queue using Stacks	Solution	39.00%	Easy
233	Number of Digit One	Solution	29.20%	Hard
234	Palindrome Linked List	Solution	33.90%	Easy
235	Lowest Common Ancestor of a Binary Search Tree	Solution	40.60%	Easy
236	Lowest Common Ancestor of a Binary Tree	Solution	30.80%	Medium
237	Delete Node in a Linked List	Solution	48.30%	Easy
238	Product of Array Except Self	Solution	51.10%	Medium
239	Sliding Window Maximum	Solution	34.80%	Hard
240	Search a 2D Matrix II	Solution	39.20%	Medium
241	Different Ways to Add Parentheses	Solution	46.80%	Medium
243	Shortest Word Distance	Solution	54.20%	Easy
244	Shortest Word Distance II	Solution	42.30%	Medium
245	Shortest Word Distance III	Solution	51.70%	Medium
246	Strobogrammatic Number	Solution	40.50%	Easy
247	Strobogrammatic Number II	Solution	41.40%	Medium
248	Strobogrammatic Number III	Solution	33.10%	Hard
249	Group Shifted Strings	Solution	45.40%	Medium
250	Count Univalue Subtrees	Solution	44.90%	Medium
251	Flatten 2D Vector	Solution	41.80%	Medium
252	Meeting Rooms	Solution	49.40%	Easy
253	Meeting Rooms II	Solution	39.80%	Medium
254	Factor Combinations	Solution	43.70%	Medium
255	Verify Preorder Sequence in Binary Search Tree	Solution	41.30%	Medium
256	Paint House	Solution	46.60%	Easy
257	Binary Tree Paths	Solution	42.40%	Easy
258	Add Digits	Solution	52.30%	Easy
259	3Sum Smaller	Solution	42.50%	Medium
260	Single Number III	Solution	54.00%	Medium
261	Graph Valid Tree	Solution	38.50%	Medium
263	Ugly Number	Solution	39.90%	Easy
264	Ugly Number II	Solution	33.80%	Medium
265	Paint House II	Solution	39.00%	Hard
266	Palindrome Permutation	Solution	58.40%	Easy
267	Palindrome Permutation II	Solution	32.20%	Medium
268	Missing Number	Solution	45.70%	Easy
269	Alien Dictionary	Solution	27.00%	Hard
270	Closest Binary Search Tree Value	Solution	41.30%	Easy
271	Encode and Decode Strings	Solution	25.90%	Medium
272	Closest Binary Search Tree Value II	Solution	40.80%	Hard
273	Integer to English Words	Solution	23.00%	Hard
274	H-Index	Solution	34.00%	Medium
275	H-Index II	Solution	35.10%	Medium
276	Paint Fence	Solution	35.20%	Easy
277	Find the Celebrity	Solution	35.40%	Medium
278	First Bad Version	Solution	26.50%	Easy
279	Perfect Squares	Solution	38.30%	Medium
280	Wiggle Sort	Solution	58.90%	Medium
281	Zigzag Iterator	Solution	53.40%	Medium
282	Expression Add Operators	Solution	30.80%	Hard
283	Move Zeroes	Solution	52.10%	Easy
284	Peeking Iterator	Solution	36.20%	Medium
285	Inorder Successor in BST	Solution	34.50%	Medium
286	Walls and Gates	Solution	46.00%	Medium
287	Find the Duplicate Number	Solution	45.30%	Medium
288	Unique Word Abbreviation	Solution	18.40%	Medium
289	Game of Life	Solution	38.30%	Medium
290	Word Pattern	Solution	33.80%	Easy
291	Word Pattern II	Solution	38.70%	Hard
292	Nim Game	Solution	55.40%	Easy
293	Flip Game	Solution	57.60%	Easy
294	Flip Game II	Solution	47.10%	Medium
295	Find Median from Data Stream	Solution	30.70%	Hard
296	Best Meeting Point	Solution	52.60%	Hard
297	Serialize and Deserialize Binary Tree	Solution	35.80%	Hard
298	Binary Tree Longest Consecutive Sequence	Solution	42.20%	Medium
299	Bulls and Cows	Solution	36.50%	Medium
300	Longest Increasing Subsequence	Solution	39.10%	Medium
301	Remove Invalid Parentheses	Solution	36.20%	Hard
302	Smallest Rectangle Enclosing Black Pixels	Solution	47.20%	Hard
303	Range Sum Query - Immutable	Solution	33.40%	Easy
304	Range Sum Query 2D - Immutable	Solution	28.00%	Medium
305	Number of Islands II	Solution	39.80%	Hard
306	Additive Number	Solution	27.80%	Medium
307	Range Sum Query - Mutable	Solution	23.60%	Medium
308	Range Sum Query 2D - Mutable	Solution	27.20%	Hard
309	Best Time to Buy and Sell Stock with Cooldown	Solution	42.50%	Medium
310	Minimum Height Trees	Solution	29.00%	Medium
311	Sparse Matrix Multiplication	Solution	53.10%	Medium
312	Burst Balloons	Solution	44.10%	Hard
313	Super Ugly Number	Solution	38.90%	Medium
314	Binary Tree Vertical Order Traversal	Solution	38.30%	Medium
315	Count of Smaller Numbers After Self	Solution	35.30%	Hard
316	Remove Duplicate Letters	Solution	30.80%	Hard
317	Shortest Distance from All Buildings	Solution	34.90%	Hard
318	Maximum Product of Word Lengths	Solution	46.40%	Medium
319	Bulb Switcher	Solution	43.20%	Medium
320	Generalized Abbreviation	Solution	46.70%	Medium
321	Create Maximum Number	Solution	24.90%	Hard
322	Coin Change	Solution	26.90%	Medium
323	Number of Connected Components in an Undirected Graph	Solution	49.30%	Medium
324	Wiggle Sort II	Solution	26.50%	Medium
325	Maximum Size Subarray Sum Equals k	Solution	43.30%	Medium
326	Power of Three	Solution	40.90%	Easy
327	Count of Range Sum	Solution	31.00%	Hard
328	Odd Even Linked List	Solution	45.80%	Medium
329	Longest Increasing Path in a Matrix	Solution	37.60%	Hard
330	Patching Array	Solution	32.90%	Hard
331	Verify Preorder Serialization of a Binary Tree	Solution	37.50%	Medium
332	Reconstruct Itinerary	Solution	30.00%	Medium
333	Largest BST Subtree	Solution	31.40%	Medium
334	Increasing Triplet Subsequence	Solution	39.60%	Medium
335	Self Crossing	Solution	26.40%	Hard
336	Palindrome Pairs	Solution	27.60%	Hard
337	House Robber III	Solution	45.40%	Medium
338	Counting Bits	Solution	62.70%	Medium
339	Nested List Weight Sum	Solution	64.30%	Easy
340	Longest Substring with At Most K Distinct Characters	Solution	38.30%	Hard
341	Flatten Nested List Iterator	Solution	43.90%	Medium
342	Power of Four	Solution	39.40%	Easy
343	Integer Break	Solution	46.70%	Medium
344	Reverse String	Solution	61.00%	Easy
345	Reverse Vowels of a String	Solution	39.60%	Easy
346	Moving Average from Data Stream	Solution	61.20%	Easy
347	Top K Frequent Elements	Solution	50.40%	Medium
348	Design Tic-Tac-Toe	Solution	46.40%	Medium
349	Intersection of Two Arrays	Solution	48.70%	Easy
350	Intersection of Two Arrays II	Solution	44.20%	Easy
351	Android Unlock Patterns	Solution	44.60%	Medium
352	Data Stream as Disjoint Intervals	Solution	41.30%	Hard
353	Design Snake Game	Solution	27.50%	Medium
354	Russian Doll Envelopes	Solution	32.70%	Hard
355	Design Twitter	Solution	26.00%	Medium
356	Line Reflection	Solution	30.40%	Medium
357	Count Numbers with Unique Digits	Solution	46.20%	Medium
358	Rearrange String k Distance Apart	Solution	31.80%	Hard
359	Logger Rate Limiter	Solution	61.40%	Easy
360	Sort Transformed Array	Solution	45.20%	Medium
361	Bomb Enemy	Solution	40.80%	Medium
362	Design Hit Counter	Solution	55.60%	Medium
363	Max Sum of Rectangle No Larger Than K	Solution	34.00%	Hard
364	Nested List Weight Sum II	Solution	54.20%	Medium
365	Water and Jug Problem	Solution	28.30%	Medium
366	Find Leaves of Binary Tree	Solution	61.70%	Medium
367	Valid Perfect Square	Solution	38.80%	Easy
368	Largest Divisible Subset	Solution	33.90%	Medium
369	Plus One Linked List	Solution	54.90%	Medium
370	Range Addition	Solution	57.70%	Medium
371	Sum of Two Integers	Solution	50.80%	Easy
372	Super Pow	Solution	34.80%	Medium
373	Find K Pairs with Smallest Sums	Solution	31.70%	Medium
374	Guess Number Higher or Lower	Solution	37.30%	Easy
375	Guess Number Higher or Lower II	Solution	36.20%	Medium
376	Wiggle Subsequence	Solution	36.20%	Medium
377	Combination Sum IV	Solution	43.00%	Medium
378	Kth Smallest Element in a Sorted Matrix	Solution	45.90%	Medium
379	Design Phone Directory	Solution	37.20%	Medium
380	Insert Delete GetRandom O(1)	Solution	40.30%	Medium
381	Insert Delete GetRandom O(1) - Duplicates allowed	Solution	29.90%	Hard
382	Linked List Random Node	Solution	47.70%	Medium
383	Ransom Note	Solution	48.10%	Easy
384	Shuffle an Array	Solution	47.60%	Medium
385	Mini Parser	Solution	31.00%	Medium
386	Lexicographical Numbers	Solution	42.90%	Medium
387	First Unique Character in a String	Solution	47.30%	Easy
388	Longest Absolute File Path	Solution	37.70%	Medium
389	Find the Difference	Solution	51.70%	Easy
390	Elimination Game	Solution	42.70%	Medium
391	Perfect Rectangle	Solution	27.70%	Hard
392	Is Subsequence	Solution	44.70%	Medium
393	UTF-8 Validation	Solution	34.90%	Medium
394	Decode String	Solution	42.20%	Medium
395	Longest Substring with At Least K Repeating Characters	Solution	35.80%	Medium
396	Rotate Function	Solution	34.20%	Medium
397	Integer Replacement	Solution	30.60%	Medium
398	Random Pick Index	Solution	45.30%	Medium
399	Evaluate Division	Solution	42.90%	Medium
400	Nth Digit	Solution	29.90%	Easy
401	Binary Watch	Solution	44.80%	Easy
402	Remove K Digits	Solution	25.80%	Medium
403	Frog Jump	Solution	32.80%	Hard
404	Sum of Left Leaves	Solution	47.90%	Easy
405	Convert a Number to Hexadecimal	Solution	41.10%	Easy
406	Queue Reconstruction by Height	Solution	56.80%	Medium
407	Trapping Rain Water II	Solution	37.80%	Hard
408	Valid Word Abbreviation	Solution	28.40%	Easy
409	Longest Palindrome	Solution	46.20%	Easy
410	Split Array Largest Sum	Solution	39.80%	Hard
411	Minimum Unique Word Abbreviation	Solution	33.70%	Hard
412	Fizz Buzz	Solution	58.00%	Easy
413	Arithmetic Slices	Solution	54.50%	Medium
414	Third Maximum Number	Solution	28.20%	Easy
415	Add Strings	Solution	41.80%	Easy
416	Partition Equal Subset Sum	Solution	38.70%	Medium
417	Pacific Atlantic Water Flow	Solution	35.10%	Medium
418	Sentence Screen Fitting	Solution	28.70%	Medium
419	Battleships in a Board	Solution	63.70%	Medium
420	Strong Password Checker	Solution	19.20%	Hard
421	Maximum XOR of Two Numbers in an Array	Solution	48.60%	Medium
422	Valid Word Square	Solution	36.50%	Easy
423	Reconstruct Original Digits from English	Solution	44.90%	Medium
424	Longest Repeating Character Replacement	Solution	42.50%	Medium
425	Word Squares	Solution	42.90%	Hard
426	Convert Binary Search Tree to Sorted Doubly Linked List	Solution	18.50%	Medium
427	Construct Quad Tree	Solution	43.10%	Easy
428	Serialize and Deserialize N-ary Tree	Solution	26.40%	Hard
429	N-ary Tree Level Order Traversal	Solution	42.80%	Easy
430	Flatten a Multilevel Doubly Linked List	Solution	23.50%	Medium
431	Encode N-ary Tree to Binary Tree	Solution	28.50%	Hard
432	All O`one Data Structure	Solution	27.80%	Hard
433	Minimum Genetic Mutation	Solution	35.50%	Medium
434	Number of Segments in a String	Solution	36.60%	Easy
435	Non-overlapping Intervals	Solution	41.10%	Medium
436	Find Right Interval	Solution	41.70%	Medium
437	Path Sum III	Solution	40.30%	Easy
438	Find All Anagrams in a String	Solution	34.00%	Easy
439	Ternary Expression Parser	Solution	51.60%	Medium
440	K-th Smallest in Lexicographical Order	Solution	25.80%	Hard
441	Arranging Coins	Solution	36.70%	Easy
442	Find All Duplicates in an Array	Solution	57.70%	Medium
443	String Compression	Solution	35.80%	Easy
444	Sequence Reconstruction	Solution	19.60%	Medium
445	Add Two Numbers II	Solution	46.80%	Medium
446	Arithmetic Slices II - Subsequence	Solution	28.00%	Hard
447	Number of Boomerangs	Solution	47.20%	Easy
448	Find All Numbers Disappeared in an Array	Solution	51.30%	Easy
449	Serialize and Deserialize BST	Solution	42.90%	Medium
450	Delete Node in a BST	Solution	37.60%	Medium
451	Sort Characters By Frequency	Solution	52.40%	Medium
452	Minimum Number of Arrows to Burst Balloons	Solution	44.60%	Medium
453	Minimum Moves to Equal Array Elements	Solution	48.10%	Easy
454	4Sum II	Solution	47.80%	Medium
455	Assign Cookies	Solution	47.40%	Easy
456	132 Pattern	Solution	27.60%	Medium
457	Circular Array Loop	Solution	23.20%	Medium
458	Poor Pigs	Solution	43.00%	Easy
459	Repeated Substring Pattern	Solution	38.40%	Easy
460	LFU Cache	Solution	25.60%	Hard
461	Hamming Distance	Solution	69.50%	Easy
462	Minimum Moves to Equal Array Elements II	Solution	51.80%	Medium
463	Island Perimeter	Solution	58.20%	Easy
464	Can I Win	Solution	26.00%	Medium
465	Optimal Account Balancing	Solution	39.80%	Hard
466	Count The Repetitions	Solution	27.30%	Hard
467	Unique Substrings in Wraparound String	Solution	33.30%	Medium
468	Validate IP Address	Solution	20.50%	Medium
469	Convex Polygon	Solution	34.80%	Medium
470	Implement Rand10() Using Rand7()	Solution	42.10%	Medium
471	Encode String with Shortest Length	Solution	43.60%	Hard
472	Concatenated Words	Solution	31.60%	Hard
473	Matchsticks to Square	Solution	35.40%	Medium
474	Ones and Zeroes	Solution	38.80%	Medium
475	Heaters	Solution	29.80%	Easy
476	Number Complement	Solution	61.30%	Easy
477	Total Hamming Distance	Solution	47.80%	Medium
479	Largest Palindrome Product	Solution	25.90%	Easy
480	Sliding Window Median	Solution	30.80%	Hard
481	Magical String	Solution	45.70%	Medium
482	License Key Formatting	Solution	39.20%	Easy
483	Smallest Good Base	Solution	33.90%	Hard
484	Find Permutation	Solution	55.70%	Medium
485	Max Consecutive Ones	Solution	53.70%	Easy
486	Predict the Winner	Solution	45.40%	Medium
487	Max Consecutive Ones II	Solution	45.40%	Medium
488	Zuma Game	Solution	36.70%	Hard
489	Robot Room Cleaner	Solution	31.50%	Hard
490	The Maze	Solution	43.90%	Medium
491	Increasing Subsequences	Solution	39.10%	Medium
492	Construct the Rectangle	Solution	48.00%	Easy
493	Reverse Pairs	Solution	20.80%	Hard
494	Target Sum	Solution	44.00%	Medium
495	Teemo Attacking	Solution	51.50%	Medium
496	Next Greater Element I	Solution	56.80%	Easy
498	Diagonal Traverse	Solution	44.60%	Medium
499	The Maze III	Solution	34.30%	Hard
500	Keyboard Row	Solution	60.30%	Easy
501	Find Mode in Binary Search Tree	Solution	37.80%	Easy
502	IPO	Solution	36.40%	Hard
503	Next Greater Element II	Solution	48.20%	Medium
504	Base 7	Solution	43.90%	Easy
505	The Maze II	Solution	39.00%	Medium
506	Relative Ranks	Solution	47.10%	Easy
507	Perfect Number	Solution	32.70%	Easy
508	Most Frequent Subtree Sum	Solution	52.60%	Medium
513	Find Bottom Left Tree Value	Solution	56.50%	Medium
514	Freedom Trail	Solution	39.40%	Hard
515	Find Largest Value in Each Tree Row	Solution	56.00%	Medium
516	Longest Palindromic Subsequence	Solution	43.30%	Medium
517	Super Washing Machines	Solution	36.40%	Hard
518	Coin Change 2	Solution	36.30%	Medium
520	Detect Capital	Solution	51.90%	Easy
521	Longest Uncommon Subsequence I	Solution	55.80%	Easy
522	Longest Uncommon Subsequence II	Solution	32.20%	Medium
523	Continuous Subarray Sum	Solution	23.40%	Medium
524	Longest Word in Dictionary through Deleting	Solution	43.50%	Medium
525	Contiguous Array	Solution	41.80%	Medium
526	Beautiful Arrangement	Solution	53.00%	Medium
527	Word Abbreviation	Solution	44.50%	Hard
529	Minesweeper	Solution	49.60%	Medium
530	Minimum Absolute Difference in BST	Solution	48.10%	Easy
531	Lonely Pixel I	Solution	56.50%	Medium
532	K-diff Pairs in an Array	Solution	28.40%	Easy
533	Lonely Pixel II	Solution	45.40%	Medium
535	Encode and Decode TinyURL	Solution	74.00%	Medium
536	Construct Binary Tree from String	Solution	42.80%	Medium
537	Complex Number Multiplication	Solution	64.10%	Medium
538	Convert BST to Greater Tree	Solution	48.70%	Easy
539	Minimum Time Difference	Solution	46.20%	Medium
540	Single Element in a Sorted Array	Solution	56.10%	Medium
541	Reverse String II	Solution	44.10%	Easy
542	01 Matrix	Solution	33.30%	Medium
543	Diameter of Binary Tree	Solution	45.20%	Easy
544	Output Contest Matches	Solution	71.60%	Medium
545	Boundary of Binary Tree	Solution	32.70%	Medium
546	Remove Boxes	Solution	36.10%	Hard
547	Friend Circles	Solution	49.60%	Medium
548	Split Array with Equal Sum	Solution	38.10%	Medium
549	Binary Tree Longest Consecutive Sequence II	Solution	42.80%	Medium
551	Student Attendance Record I	Solution	44.80%	Easy
552	Student Attendance Record II	Solution	31.80%	Hard
553	Optimal Division	Solution	55.20%	Medium
554	Brick Wall	Solution	46.60%	Medium
555	Split Concatenated Strings	Solution	38.10%	Medium
556	Next Greater Element III	Solution	28.80%	Medium
557	Reverse Words in a String III	Solution	60.90%	Easy
558	Quad Tree Intersection	Solution	23.90%	Easy
559	Maximum Depth of N-ary Tree	Solution	50.10%	Easy
560	Subarray Sum Equals K	Solution	39.90%	Medium
561	Array Partition I	Solution	66.80%	Easy
562	Longest Line of Consecutive One in Matrix	Solution	41.10%	Medium
563	Binary Tree Tilt	Solution	46.90%	Easy
564	Find the Closest Palindrome	Solution	16.80%	Hard
565	Array Nesting	Solution	49.90%	Medium
566	Reshape the Matrix	Solution	57.70%	Easy
567	Permutation in String	Solution	36.20%	Medium
568	Maximum Vacation Days	Solution	36.40%	Hard
572	Subtree of Another Tree	Solution	40.30%	Easy
573	Squirrel Simulation	Solution	52.50%	Medium
575	Distribute Candies	Solution	58.20%	Easy
576	Out of Boundary Paths	Solution	30.60%	Medium
581	Shortest Unsorted Continuous Subarray	Solution	29.30%	Easy
582	Kill Process	Solution	51.90%	Medium
583	Delete Operation for Two Strings	Solution	44.80%	Medium
587	Erect the Fence	Solution	33.70%	Hard
588	Design In-Memory File System	Solution	36.30%	Hard
589	N-ary Tree Preorder Traversal	Solution	41.60%	Easy
590	N-ary Tree Postorder Traversal	Solution	47.00%	Easy
591	Tag Validator	Solution	31.10%	Hard
592	Fraction Addition and Subtraction	Solution	46.10%	Medium
593	Valid Square	Solution	39.90%	Medium
594	Longest Harmonious Subsequence	Solution	41.40%	Easy
598	Range Addition II	Solution	48.00%	Easy
599	Minimum Index Sum of Two Lists	Solution	46.50%	Easy
600	Non-negative Integers without Consecutive Ones	Solution	31.90%	Hard
604	Design Compressed String Iterator	Solution	33.60%	Easy
605	Can Place Flowers	Solution	30.00%	Easy
606	Construct String from Binary Tree	Solution	50.20%	Easy
609	Find Duplicate File in System	Solution	52.50%	Medium
611	Valid Triangle Number	Solution	42.00%	Medium
616	Add Bold Tag in String	Solution	38.10%	Medium
617	Merge Two Binary Trees	Solution	68.10%	Easy
621	Task Scheduler	Solution	42.50%	Medium
622	Design Circular Queue	Solution	39.70%	Medium
623	Add One Row to Tree	Solution	46.10%	Medium
624	Maximum Distance in Arrays	Solution	35.80%	Easy
625	Minimum Factorization	Solution	31.30%	Medium
628	Maximum Product of Three Numbers	Solution	44.80%	Easy
629	K Inverse Pairs Array	Solution	27.80%	Hard
630	Course Schedule III	Solution	29.40%	Hard
631	Design Excel Sum Formula	Solution	28.40%	Hard
632	Smallest Range	Solution	42.80%	Hard
633	Sum of Square Numbers	Solution	32.40%	Easy
634	Find the Derangement of An Array	Solution	36.30%	Medium
635	Design Log Storage System	Solution	49.60%	Medium
636	Exclusive Time of Functions	Solution	44.80%	Medium
637	Average of Levels in Binary Tree	Solution	56.30%	Easy
638	Shopping Offers	Solution	46.00%	Medium
639	Decode Ways II	Solution	24.20%	Hard
640	Solve the Equation	Solution	38.70%	Medium
641	Design Circular Deque	Solution	51.40%	Medium
642	Design Search Autocomplete System	Solution	30.60%	Hard
643	Maximum Average Subarray I	Solution	37.80%	Easy
644	Maximum Average Subarray II	Solution	25.70%	Hard
645	Set Mismatch	Solution	39.70%	Easy
646	Maximum Length of Pair Chain	Solution	47.50%	Medium
647	Palindromic Substrings	Solution	54.40%	Medium
648	Replace Words	Solution	48.50%	Medium
649	Dota2 Senate	Solution	36.90%	Medium
650	2 Keys Keyboard	Solution	45.50%	Medium
651	4 Keys Keyboard	Solution	49.90%	Medium
652	Find Duplicate Subtrees	Solution	38.00%	Medium
653	Two Sum IV - Input is a BST	Solution	50.30%	Easy
654	Maximum Binary Tree	Solution	70.70%	Medium
655	Print Binary Tree	Solution	48.80%	Medium
656	Coin Path	Solution	25.70%	Hard
657	Judge Route Circle	Solution	68.70%	Easy
658	Find K Closest Elements	Solution	34.60%	Medium
659	Split Array into Consecutive Subsequences	Solution	37.30%	Medium
660	Remove 9	Solution	50.10%	Hard
661	Image Smoother	Solution	46.80%	Easy
662	Maximum Width of Binary Tree	Solution	38.30%	Medium
663	Equal Tree Partition	Solution	36.40%	Medium
664	Strange Printer	Solution	34.80%	Hard
665	Non-decreasing Array	Solution	19.90%	Easy
666	Path Sum IV	Solution	50.70%	Medium
667	Beautiful Arrangement II	Solution	51.00%	Medium
668	Kth Smallest Number in Multiplication Table	Solution	40.50%	Hard
669	Trim a Binary Search Tree	Solution	58.10%	Easy
670	Maximum Swap	Solution	38.80%	Medium
671	Second Minimum Node In a Binary Tree	Solution	42.10%	Easy
672	Bulb Switcher II	Solution	48.90%	Medium
673	Number of Longest Increasing Subsequence	Solution	32.00%	Medium
674	Longest Continuous Increasing Subsequence	Solution	42.70%	Easy
675	Cut Off Trees for Golf Event	Solution	27.20%	Hard
676	Implement Magic Dictionary	Solution	49.10%	Medium
677	Map Sum Pairs	Solution	50.80%	Medium
678	Valid Parenthesis String	Solution	29.60%	Medium
679	24 Game	Solution	39.00%	Hard
680	Valid Palindrome II	Solution	32.30%	Easy
681	Next Closest Time	Solution	41.60%	Medium
682	Baseball Game	Solution	58.40%	Easy
683	K Empty Slots	Solution	33.50%	Hard
684	Redundant Connection	Solution	45.00%	Medium
685	Redundant Connection II	Solution	27.70%	Hard
686	Repeated String Match	Solution	31.50%	Easy
687	Longest Univalue Path	Solution	32.70%	Easy
688	Knight Probability in Chessboard	Solution	40.60%	Medium
689	Maximum Sum of 3 Non-Overlapping Subarrays	Solution	41.40%	Hard
690	Employee Importance	Solution	51.80%	Easy
691	Stickers to Spell Word	Solution	35.40%	Hard
692	Top K Frequent Words	Solution	41.90%	Medium
693	Binary Number with Alternating Bits	Solution	56.20%	Easy
694	Number of Distinct Islands	Solution	45.40%	Medium
695	Max Area of Island	Solution	52.20%	Easy
696	Count Binary Substrings	Solution	51.10%	Easy
697	Degree of an Array	Solution	47.10%	Easy
698	Partition to K Equal Sum Subsets	Solution	38.30%	Medium
699	Falling Squares	Solution	38.10%	Hard
700	Search in a Binary Search Tree	Solution	42.40%	Easy
701	Insert into a Binary Search Tree	Solution	38.00%	Medium
702	Search in a Sorted Array of Unknown Size	Solution	29.20%	Medium
703	Kth Largest Element in a Stream	Solution	23.90%	Easy
704	Binary Search	Solution	19.20%	Easy
705	Design HashSet	Solution	19.90%	Easy
706	Design HashMap	Solution	28.20%	Easy
707	Design Linked List	Solution	10.20%	Easy
708	Insert into a Cyclic Sorted List	Solution	10.90%	Medium
709	To Lower Case	Solution	75.50%	Easy
710	Random Pick with Blacklist	Solution	29.30%	Hard
711	Number of Distinct Islands II	Solution	42.50%	Hard
712	Minimum ASCII Delete Sum for Two Strings	Solution	51.50%	Medium
713	Subarray Product Less Than K	Solution	33.30%	Medium
714	Best Time to Buy and Sell Stock with Transaction Fee	Solution	47.20%	Medium
715	Range Module	Solution	30.80%	Hard
716	Max Stack	Solution	36.70%	Hard
717	1-bit and 2-bit Characters	Solution	49.00%	Easy
718	Maximum Length of Repeated Subarray	Solution	42.00%	Medium
719	Find K-th Smallest Pair Distance	Solution	27.70%	Hard
720	Longest Word in Dictionary	Solution	41.60%	Easy
721	Accounts Merge	Solution	34.20%	Medium
722	Remove Comments	Solution	28.00%	Medium
723	Candy Crush	Solution	55.90%	Medium
724	Find Pivot Index	Solution	39.20%	Easy
725	Split Linked List in Parts	Solution	47.10%	Medium
726	Number of Atoms	Solution	43.70%	Hard
727	Minimum Window Subsequence	Solution	32.00%	Hard
728	Self Dividing Numbers	Solution	67.00%	Easy
729	My Calendar I	Solution	42.90%	Medium
730	Count Different Palindromic Subsequences	Solution	35.80%	Hard
731	My Calendar II	Solution	38.80%	Medium
732	My Calendar III	Solution	50.20%	Hard
733	Flood Fill	Solution	47.70%	Easy
734	Sentence Similarity	Solution	39.00%	Easy
735	Asteroid Collision	Solution	37.00%	Medium
736	Parse Lisp Expression	Solution	41.90%	Hard
737	Sentence Similarity II	Solution	40.40%	Medium
738	Monotone Increasing Digits	Solution	41.30%	Medium
739	Daily Temperatures	Solution	53.90%	Medium
740	Delete and Earn	Solution	44.00%	Medium
741	Cherry Pickup	Solution	24.40%	Hard
742	Closest Leaf in a Binary Tree	Solution	35.00%	Medium
743	Network Delay Time	Solution	36.20%	Medium
744	Find Smallest Letter Greater Than Target	Solution	43.20%	Easy
745	Prefix and Suffix Search	Solution	26.30%	Hard
746	Min Cost Climbing Stairs	Solution	43.80%	Easy
747	Largest Number At Least Twice of Others	Solution	40.40%	Easy
748	Shortest Completing Word	Solution	52.40%	Medium
749	Contain Virus	Solution	40.30%	Hard
750	Number Of Corner Rectangles	Solution	57.90%	Medium
751	IP to CIDR	Solution	53.30%	Easy
752	Open the Lock	Solution	40.80%	Medium
753	Cracking the Safe	Solution	41.40%	Hard
754	Reach a Number	Solution	28.30%	Medium
755	Pour Water	Solution	35.20%	Medium
756	Pyramid Transition Matrix	Solution	47.30%	Medium
757	Set Intersection Size At Least Two	Solution	34.80%	Hard
758	Bold Words in String	Solution	39.70%	Easy
759	Employee Free Time	Solution	53.70%	Hard
760	Find Anagram Mappings	Solution	76.60%	Easy
761	Special Binary String	Solution	44.40%	Hard
762	Prime Number of Set Bits in Binary Representation	Solution	55.80%	Easy
763	Partition Labels	Solution	64.90%	Medium
764	Largest Plus Sign	Solution	40.30%	Medium
765	Couples Holding Hands	Solution	48.60%	Hard
766	Toeplitz Matrix	Solution	58.20%	Easy
767	Reorganize String	Solution	37.30%	Medium
768	Max Chunks To Make Sorted II	Solution	43.20%	Hard
769	Max Chunks To Make Sorted	Solution	48.50%	Medium
770	Basic Calculator IV	Solution	42.60%	Hard
772	Basic Calculator III	Solution	40.50%	Hard
773	Sliding Puzzle	Solution	46.40%	Hard
774	Minimize Max Distance to Gas Station	Solution	34.00%	Hard
775	Global and Local Inversions	Solution	34.70%	Medium
776	Split BST	Solution	49.40%	Medium
777	Swap Adjacent in LR String	Solution	29.20%	Medium
778	Swim in Rising Water	Solution	44.30%	Hard
779	K-th Symbol in Grammar	Solution	37.20%	Medium
780	Reaching Points	Solution	24.40%	Hard
781	Rabbits in Forest	Solution	49.60%	Medium
782	Transform to Chessboard	Solution	37.60%	Hard
783	Minimum Distance Between BST Nodes	Solution	48.00%	Easy
784	Letter Case Permutation	Solution	53.20%	Easy
785	Is Graph Bipartite?	Solution	38.80%	Medium
786	K-th Smallest Prime Fraction	Solution	33.40%	Hard
787	Cheapest Flights Within K Stops	Solution	30.00%	Medium
788	Rotated Digits	Solution	51.10%	Easy
789	Escape The Ghosts	Solution	52.10%	Medium
790	Domino and Tromino Tiling	Solution	33.20%	Medium
791	Custom Sort String	Solution	59.40%	Medium
792	Number of Matching Subsequences	Solution	37.10%	Medium
793	Preimage Size of Factorial Zeroes Function	Solution	41.10%	Hard
794	Valid Tic-Tac-Toe State	Solution	27.70%	Medium
795	Number of Subarrays with Bounded Maximum	Solution	41.50%	Medium
796	Rotate String	Solution	49.70%	Easy
797	All Paths From Source to Target	Solution	67.20%	Medium
798	Smallest Rotation with Highest Score	Solution	34.30%	Hard
799	Champagne Tower	Solution	29.90%	Medium
800	Similar RGB Color	Solution	54.60%	Easy
801	Minimum Swaps To Make Sequences Increasing	Solution	30.60%	Medium
802	Find Eventual Safe States	Solution	39.00%	Medium
803	Bricks Falling When Hit	Solution	22.80%	Hard
804	Unique Morse Code Words	Solution	71.30%	Easy
805	Split Array With Same Average	Solution	20.90%	Hard
806	Number of Lines To Write String	Solution	62.10%	Easy
807	Max Increase to Keep City Skyline	Solution	79.70%	Medium
808	Soup Servings	Solution	33.60%	Medium
809	Expressive Words	Solution	37.70%	Medium
810	Chalkboard XOR Game	Solution	39.50%	Hard
811	Subdomain Visit Count	Solution	61.30%	Easy
812	Largest Triangle Area	Solution	53.30%	Easy
813	Largest Sum of Averages	Solution	41.10%	Medium
814	Binary Tree Pruning	Solution	68.40%	Medium
815	Bus Routes	Solution	32.70%	Hard
816	Ambiguous Coordinates	Solution	42.20%	Medium
817	Linked List Components	Solution	50.80%	Medium
818	Race Car	Solution	28.10%	Hard
819	Most Common Word	Solution	48.70%	Easy
820	Short Encoding of Words	Solution	42.60%	Medium
821	Shortest Distance to a Character	Solution	60.80%	Easy
822	Card Flipping Game	Solution	36.10%	Medium
823	Binary Trees With Factors	Solution	29.30%	Medium
824	Goat Latin	Solution	55.00%	Easy
825	Friends Of Appropriate Ages	Solution	30.10%	Medium
826	Most Profit Assigning Work	Solution	32.20%	Medium
827	Making A Large Island	Solution	40.00%	Hard
828	Unique Letter String	Solution	34.00%	Hard
829	Consecutive Numbers Sum	Solution	26.80%	Medium
830	Positions of Large Groups	Solution	46.60%	Easy
831	Masking Personal Information	Solution	42.10%	Medium
832	Flipping an Image	Solution	69.20%	Easy
833	Find And Replace in String	Solution	38.30%	Medium
834	Sum of Distances in Tree	Solution	32.60%	Hard
835	Image Overlap	Solution	39.80%	Medium
836	Rectangle Overlap	Solution	42.00%	Easy
837	New 21 Game	Solution	25.80%	Medium
838	Push Dominoes	Solution	40.40%	Medium
839	Similar String Groups	Solution	33.30%	Hard
840	Magic Squares In Grid	Solution	34.30%	Easy
841	Keys and Rooms	Solution	56.70%	Medium
842	Split Array into Fibonacci Sequence	Solution	34.20%	Medium
843	Guess the Word	Solution	33.90%	Hard
844	Backspace String Compare	Solution	45.40%	Easy
845	Longest Mountain in Array	Solution	31.40%	Medium
846	Hand of Straights	Solution	42.70%	Medium
847	Shortest Path Visiting All Nodes	Solution	40.90%	Hard
848	Shifting Letters	Solution	35.10%	Medium
849	Maximize Distance to Closest Person	Solution	38.10%	Easy
850	Rectangle Area II	Solution	42.10%	Hard
851	Loud and Rich	Solution	42.90%	Medium
852	Peak Index in a Mountain Array	Solution	68.00%	Easy
853	Car Fleet	Solution	31.00%	Medium
854	K-Similar Strings	Solution	30.10%	Hard
855	Exam Room	Solution	29.30%	Medium
856	Score of Parentheses	Solution	54.10%	Medium
857	Minimum Cost to Hire K Workers	Solution	38.70%	Hard
858	Mirror Reflection	Solution	47.20%	Medium
859	Buddy Strings	Solution	26.80%	Easy
860	Lemonade Change	Solution	49.40%	Easy
861	Score After Flipping Matrix	Solution	69.10%	Medium
862	Shortest Subarray with Sum at Least K	Solution	16.50%	Hard
863	All Nodes Distance K in Binary Tree	Solution	40.20%	Medium
864	Shortest Path to Get All Keys	Solution	31.00%	Hard
865	Smallest Subtree with all the Deepest Nodes	Solution	49.40%	Medium
866	Prime Palindrome	Solution	17.60%	Medium
867	Transpose Matrix	Solution	66.80%	Easy
868	Binary Gap	Solution	60.90%	Easy
869	Reordered Power of 2	Solution	46.80%	Medium
870	Advantage Shuffle	Solution	38.60%	Medium
871	Minimum Number of Refueling Stops	Solution	24.80%	Hard
872	Leaf-Similar Trees	Solution	64.90%	Easy
873	Length of Longest Fibonacci Subsequence	Solution	40.60%	Medium
874	Walking Robot Simulation	Solution	26.20%	Easy
875	Koko Eating Bananas	Solution	39.60%	Medium
876	Middle of the Linked List    New	Solution	73.80%	Easy
877	Stone Game    New	Solution	40.40%	Medium
878	Nth Magical Number    New	Solution	14.30%	Hard
879	Profitable Schemes    New	Solution	19.10%	Hard
880	Random Pick with Weight    New	Solution	44.50%	Medium
881	Random Flip Matrix    New	Solution	35.20%	Medium
882	Random Point in Non-overlapping Rectangles    New	Solution	32.20%	Medium
883	Generate Random Point in a Circle    New	Solution	29.70%	Medium

常用思路

1. 字符串

2. 排序

挖坑

希望写完这份javascirpt版之后，能写份c++的