要找相应的代码请直接去 https://github.com/hanzichi/leetcode/tree/master/Algorithms 搜索！我已经很久没更新 README 了！

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I decide to add solutions WITH SIMPLE EXPLAINATION to each problem I have solved, to practise my written English, as well as recording something for you and myself. —— Mar 31. 2016

For some simple problems, I will not explain for them. -- May 5, 2016

✏️ Leetcode Solutions with JavaScript

If you have any question, please give me an issue.

(Notes: 📘 means you need to buy a book from Leetcode)

#	Title	Source Code	Explaination	Difficulty
347	Top K Frequent Elements	JavaScript	Explaination	Medium
345	Reverse Vowels of a String	JavaScript	Explaination	Easy
344	Reverse String	JavaScript	Explaination	Easy
343	Integer Break	JavaScript	Explaination	Medium
342	Power of Four	JavaScript	Explaination	Easy
341	Flatten Nested List Iterator	JavaScript	Explaination	Medium
339	Nested List Weight Sum	📘		Easy
338	Counting Bits	JavaScript	Explaination	Medium
337	House Robber III	JavaScript	Explaination	Medium
336	Palindrome Pairs
335	Self Crossing	JavaScript	Explaination	Medium
334	Increasing Triplet Subsequence	JavaScript	Explaination	Medium
333	Largest BST Subtree	📘		Medium
332	Reconstruct Itinerary
331	Verify Preorder Serialization of a Binary Tree
330	Patching Array	JavaScript	Explaination	Medium
329	Longest Increasing Path in a Matrix
328	Odd Even Linked List
327	Count of Range Sum
326	Power of Three	JavaScript	Explaination	Easy
325	Maximum Size Subarray Sum Equals k	📘		Easy
324	Wiggle Sort II
323	Number of Connected Components in an Undirected Graph	📘		Medium
322	Coin Change	JavaScript	Explaination	Medium
321	Create Maximum Number
320	Generalized Abbreviation	📘		Medium
319	Bulb Switcher	JavaScript	Explaination	Medium
318	Maximum Product of Word Lengths
317	Shortest Distance from All Buildings	📘		Hard
316	Remove Duplicate Letters
315	Count of Smaller Numbers After Self	JavaScript	Explaination	Hard
314	Binary Tree Vertical Order Traversal	📘		Medium
313	Super Ugly Number	JavaScript	Explaination	Medium
312	Burst Balloons
311	Sparse Matrix Multiplication	📘		Medium
310	Minimum Height Trees
309	Best Time to Buy and Sell Stock with Cooldown
308	Range Sum Query 2D - Mutable	📘		Hard
307	Range Sum Query - Mutable	JavaScript	Explaination	Medium
306	Additive Number	JavaScript	Explaination	Medium
305	Number of Islands II	📘
304	Range Sum Query 2D - Immutable	JavaScript	Explaination	Medium
303	Range Sum Query - Immutable	JavaScript	Explaination	Easy
302	Smallest Rectangle Enclosing Black Pixels	📘
301	Remove Invalid Parentheses
300	Longest Increasing Subsequence	JavaScript	Explaination	Medium
299	Bulls and Cows	JavaScript	Explaination	Easy
298	Binary Tree Longest Consecutive Sequence	📘
297	Serialize and Deserialize Binary Tree
296	Best Meeting Point	📘
295	Find Median from Data Stream	JavaScript	Explaination	Hard
294	Flip Game II	📘
293	Flip Game	📘
292	Nim Game	JavaScript	Explaination	Easy
291	Word Pattern II	📘
290	Word Pattern	JavaScript	Explaination	Easy
289	Game of Life	JavaScript	Explaination	Medium
288	Unique Word Abbreviation	📘
287	Find the Duplicate Number	JavaScript	Explaination	Hard
286	Walls and Gates	📘
285	Inorder Successor in BST	📘
284	Peeking Iterator	Not Support JavaScript
283	Move Zeroes	JavaScript	Explaination	Easy
282	Expression Add Operators
281	Zigzag Iterator	📘
280	Wiggle Sort	📘
279	Perfect Squares	JavaScript	Explaination	Medium
278	First Bad Version	JavaScript	Explaination	Easy
277	Find the Celebrity	📘
276	Paint Fence	📘
275	H-Index II	JavaScript	Explaination	Medium
274	H-Index	JavaScript	Explaination	Medium
273	Integer to English Words
272	Closest Binary Search Tree Value II	📘
271	Encode and Decode Strings	📘
270	Closest Binary Search Tree Value	📘
269	Alien Dictionary	📘
268	Missing Number	JavaScript	Explaination	Medium
267	Palindrome Permutation II	📘
266	Palindrome Permutation	📘
265	Paint House II	📘
264	Ugly Number II	JavaScript	Explaination	Medium
263	Ugly Number	JavaScript	Explaination	Easy
261	Graph Valid Tree	📘
260	Single Number III	JavaScript		Medium
259	3Sum Smaller	📘
258	Add Digits	JavaScript	Explaination	Easy
257	Binary Tree Paths	JavaScript	Explaination	Easy
256	Paint House)	📘
255	Verify Preorder Sequence in Binary Search Tree	📘
254	Factor Combinations	📘
253	Meeting Rooms II	📘
252	Meeting Rooms	📘
251	Flatten 2D Vector	📘
250	Count Univalue Subtrees	📘
249	Group Shifted Strings	📘
248	Strobogrammatic Number III	📘
247	Strobogrammatic Number II	📘
246	Strobogrammatic Number	📘
245	Shortest Word Distance III	📘
244	Shortest Word Distance II	📘
243	Shortest Word Distance	📘
242	Valid Anagram	JavaScript	Explaination	Easy
241	Different Ways to Add Parentheses
240	Search a 2D Matrix II	JavaScript	Explaination	Medium
239	Sliding Window Maximum
238	Product of Array Except Self	JavaScript		Medium
237	Delete Node in a Linked List	JavaScript	Explaination	Easy
236	Lowest Common Ancestor of a Binary Tree
235	Lowest Common Ancestor of a Binary Search Tree
234	Palindrome Linked List	JavaScript	Explaination	Easy
233	Number of Digit One	JavaScript		Hard
232	Implement Queue using Stacks	JavaScript	Explaination	Easy
231	Power of Two	JavaScript	Explaination	Easy
230	Kth Smallest Element in a BST
229	Majority Element II	JavaScript		Medium
228	Summary Ranges	JavaScript	Explaination	Medium
227	Basic Calculator II
226	Invert Binary Tree	JavaScript	Explaination	Easy
225	Implement Stack using Queues	JavaScript	Explaination	Easy
224	Basic Calculator
223	Rectangle Area	JavaScript	Explaination	Easy
222	Count Complete Tree Nodes
221	Maximal Square	JavaScript		Medium
220	Contains Duplicate III	JavaScript		Medium
219	Contains Duplicate II	JavaScript		Easy
218
217	Contains Duplicate	JavaScript		Easy
216	Combination Sum III	JavaScript		Medium
215	Kth Largest Element in an Array	JavaScript	Explaination	Medium
214	Shortest Palindrome	JavaScript	Explaination	Hard
213	House Robber II	JavaScript		Medium
212	Word Search II
211	Add and Search Word - Data structure design
210	Course Schedule II
209	Minimum Size Subarray Sum	JavaScript		Medium
208	Implement Trie (Prefix Tree)
207	Course Schedule
206	Reverse Linked List	JavaScript		Easy
205	Isomorphic Strings	JavaScript	Explaination	Easy
204	Count Primes	JavaScript	Explaination	Easy
203	Remove Linked List Elements	JavaScript	Explaination	Easy
202	Happy Number	JavaScript	Explaination	Easy
201	Bitwise AND of Numbers Range	JavaScript		Medium
200	Number of Islands	JavaScript	Explaination	Medium
199	Binary Tree Right Side View	JavaScript		Medium
198	House Robber	JavaScript		Easy
191	Number of 1 Bits	JavaScript		Easy
190	Reverse Bits	JavaScript	Explaination	Easy
189	Rotate Array	JavaScript	Explaination	Easy
188	Best Time to Buy and Sell Stock IV
187	Repeated DNA Sequences	JavaScript	Explaination	Medium
186	Reverse Words in a String II
179	Largest Number	JavaScript	Explaination	Medium
174	Dungeon Game
173	Binary Search Tree Iterator
172	Factorial Trailing Zeroes	JavaScript	Explaination	Easy
171	Excel Sheet Column Number	JavaScript	Explaination	Easy
170	Two Sum III - Data structure design
169	Majority Element	JavaScript	Explaination	Easy
168	Excel Sheet Column Title	JavaScript	Explaination	Easy
167	Two Sum II - Input array is sorted
166	Fraction to Recurring Decimal	JavaScript	Explaination	Medium
165	Compare Version Numbers	JavaScript	Explaination	Easy
164	Maximum Gap	JavaScript	Explaination	Hard
163	Missing Ranges
162	Find Peak Element	JavaScript	Explaination	Medium
161	One Edit Distance
160	Intersection of Two Linked Lists
159	Longest Substring with At Most Two Distinct Characters
158	Read N Characters Given Read4 II - Call multiple times
157	Read N Characters Given Read4
156	Binary Tree Upside Down
155	Min Stack	Not Support JavaScript
154	Find Minimum in Rotated Sorted Array II	JavaScript		Hard
153	Find Minimum in Rotated Sorted Array	JavaScript		Medium
152	Maximum Product Subarray	JavaScript		Medium
151	Reverse Words in a String	JavaScript	Explaination	Medium
150	Evaluate Reverse Polish Notation
149	Max Points on a Line
148	Sort List	JavaScript	Explaination	Medium
147	Insertion Sort List	JavaScript		Medium
146	LRU Cache	JavaScript	Explaination	Hard
145	Binary Tree Postorder Traversal	JavaScript		Hard
144	Binary Tree Preorder Traversal	JavaScript		Medium
141	Linked List Cycle	JavaScript	Explaination	Easy
137	Single Number II	JavaScript		Medium
136	Single Number	JavaScript		Medium
132	Palindrome Partitioning II	JavaScript	Explaination	Hard
131	Palindrome Partitioning	JavaScript	Explaination	Medium
129	Sum Root to Leaf Numbers	JavaScript		Medium
128	Longest Consecutive Sequence	JavaScript		Hard
125	Valid Palindrome	JavaScript	Explaination	Easy
122	Best Time to Buy and Sell Stock II	JavaScript	Explaination	Medium
121	Best Time to Buy and Sell Stock	JavaScript	Explaination	Easy
120	Triangle	JavaScript		Medium
119	Pascal's Triangle II	JavaScript	Explaination	Easy
118	Pascal's Triangle	JavaScript	Explaination	Easy
114	Flatten Binary Tree to Linked List	JavaScript	Explaination	Medium
113	Path Sum II	JavaScript		Medium
112	Path Sum	JavaScript		Easy
111	Minimum Depth of Binary Tree	JavaScript		Easy
110	Balanced Binary Tree	JavaScript		Easy
107	Binary Tree Level Order Traversal II	JavaScript		Easy
104	Maximum Depth of Binary Tree	JavaScript		Easy
102	Binary Tree Level Order Traversal	JavaScript		Easy
100	Same Tree	JavaScript		Easy
94	Binary Tree Inorder Traversal	JavaScript		Medium
93	Restore IP Addresses	JavaScript		Medium
91	Decode Ways	JavaScript		Medium
90	Subsets II	JavaScript		Medium
89	Gray Code	JavaScript		Medium
88	Merge Sorted Array	JavaScript	Explaination	Easy
86	Partition List	JavaScript	Explaination	Medium
85	Maximal Rectangle	JavaScript		Hard
84	Largest Rectangle in Histogram	JavaScript		Hard
83	Remove Duplicates from Sorted List	JavaScript		Easy
82	Remove Duplicates from Sorted List II	JavaScript		Medium
81	Search in Rotated Sorted Array II	JavaScript		Medium
80	Remove Duplicates from Sorted Array II	JavaScript	Explaination	Medium
78	Subsets	JavaScript		Medium
77	Combinations	JavaScript		Medium
75	Sort Colors	JavaScript	Explaination	Medium
74	Search a 2D Matrix	JavaScript		Medium
73	Set Matrix Zeroes	JavaScript	Explaination	Medium
70	Climbing Stairs	JavaScript	Explaination	Easy
69	Sqrt(x)	JavaScript	Explaination	Medium
67	Add Binary	JavaScript	Explaination	Easy
66	Plus One	JavaScript	Explaination	Easy
65	Valid Number	JavaScript	Explaination	Hard
64	Minimum Path Sum	JavaScript		Medium
63	Unique Paths II	JavaScript	Explaination	Medium
62	Unique Paths	JavaScript	Explaination	Medium
61	Rotate List	JavaScript	Explaination	Medium
60	Permutation Sequence	JavaScript		Medium
59	Spiral Matrix II	JavaScript		Medium
58	Length of Last Word	JavaScript	Explaination	Easy
57	Insert Interval	JavaScript		Hard
56	Merge Intervals	JavaScript		Hard
55	Jump Game	JavaScript		Medium
54	Spiral Matrix	JavaScript		Medium
53	Maximum Subarray	JavaScript		Medium
52	N-Queens II	JavaScript		Hard
51	N-Queens	JavaScript		Hard
50	Pow(x, n)	JavaScript	Explaination	Medium
48	Rotate Image	JavaScript		Medium
47	Permutations II	JavaScript		Medium
46	Permutations	JavaScript		Medium
45	Jump Game II	JavaScript		Hard
41	First Missing Positive	JavaScript	Explaination	Hard
39	Combination Sum	JavaScript		Medium
38	Count and Say	JavaScript	Explaination	Easy
36	Valid Sudoku	JavaScript		Easy
35	Search Insert Position	JavaScript	Explaination	Medium
34	Search for a Range	JavaScript	Explaination	Medium
33	Search in Rotated Sorted Array	JavaScript		Hard
31	Next Permutation	JavaScript		Medium
29	Divide Two Integers	JavaScript	Explaination	Medium
28	Implement strStr()	JavaScript	Explaination	Easy
27	Remove Element	JavaScript	Explaination	Easy
26	Remove Duplicates from Sorted Array	JavaScript	Explaination	Easy
24	Swap Nodes in Pairs	JavaScript	Explaination	Easy
22	Generate Parentheses	JavaScript		Medium
21	Merge Two Sorted Lists	JavaScript	Explaination	Easy
20	Valid Parentheses	JavaScript	Explaination	Easy
19	Remove Nth Node From End of List	JavaScript	Explaination	Easy
18	4Sum	JavaScript		Medium
17	Letter Combinations of a Phone Number	JavaScript	Explaination	Medium
16	3Sum Closest	JavaScript		Medium
15	3Sum	JavaScript		Medium
14	Longest Common Prefix	JavaScript	Explaination	Easy
10	Regular Expression Matching	JavaScript	Explaination	Hard
9	Palindrome Number	JavaScript	Explaination	Easy
7	Reverse Integer	JavaScript	Explaination	Easy
6	ZigZag Conversion	JavaScript	Explaination	Easy
5	Longest Palindromic Substring	JavaScript	Explaination	Medium
1	Two Sum	JavaScript	Explaination	Easy