GitHub - iplus26/LeetCode-Solutions: My LeetCode Solutions, mostly in JavaScript · GitHub
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Build Your Own Version

I write a tool (check out the build/ folder) to optimize the process. It will programmatically:

  1. Fetch the problem list from LeetCode OJ and save in build/leetcode.html

  2. Check out the local solutions (Pls save the code as 123. Some Problem/whatever-you-like.js)

  3. Update the README file

Try it: Just clone the repo and run

npm install && npm run build

Be free to contact to discuss about this simple tool.

My Version

This is my version of LeetCode solutions.

90 / 382 questions solved. (😄 for Easy, 😎 for Medium, 😈 for Hard)

# Difficulty Title C C++ Java JavaScript
1 😄 Two Sum ⭐️
2 😎 Add Two Numbers ⭐️
3 😎 Longest Substring Without Repeating Characters ⭐️
4 😈 Median of Two Sorted Arrays
5 😎 Longest Palindromic Substring
6 😄 ZigZag Conversion ⭐️
7 😄 Reverse Integer ⭐️ ⭐️
8 😄 String to Integer (atoi) ⭐️
9 😄 Palindrome Number ⭐️
10 😈 Regular Expression Matching
11 😎 Container With Most Water
12 😎 Integer to Roman ⭐️
13 😄 Roman to Integer ⭐️
14 😄 Longest Common Prefix ⭐️
15 😎 3Sum ⭐️
16 😎 3Sum Closest
17 😎 Letter Combinations of a Phone Number
18 😎 4Sum
19 😄 Remove Nth Node From End of List ⭐️
20 😄 Valid Parentheses ⭐️
21 😄 Merge Two Sorted Lists ⭐️
22 😎 Generate Parentheses ⭐️
23 😈 Merge k Sorted Lists
24 😄 Swap Nodes in Pairs ⭐️
25 😈 Reverse Nodes in k-Group
26 😄 Remove Duplicates from Sorted Array ⭐️
27 😄 Remove Element ⭐️
28 😄 Implement strStr() ⭐️ ⭐️
29 😎 Divide Two Integers
30 😈 Substring with Concatenation of All Words
31 😎 Next Permutation
32 😈 Longest Valid Parentheses
33 😈 Search in Rotated Sorted Array
34 😎 Search for a Range ⭐️
35 😎 Search Insert Position
36 😄 Valid Sudoku
37 😈 Sudoku Solver
38 😄 Count and Say ⭐️
39 😎 Combination Sum
40 😎 Combination Sum II
41 😈 First Missing Positive ⭐️
42 😈 Trapping Rain Water
43 😎 Multiply Strings
44 😈 Wildcard Matching
45 😈 Jump Game II
46 😎 Permutations
47 😎 Permutations II
48 😎 Rotate Image
49 😎 Group Anagrams
50 😎 Pow(x, n) ⭐️
51 😈 N-Queens
52 😈 N-Queens II
53 😎 Maximum Subarray
54 😎 Spiral Matrix ⭐️
55 😎 Jump Game
56 😈 Merge Intervals
57 😈 Insert Interval
58 😄 Length of Last Word ⭐️
59 😎 Spiral Matrix II
60 😎 Permutation Sequence
61 😎 Rotate List
62 😎 Unique Paths
63 😎 Unique Paths II
64 😎 Minimum Path Sum
65 😈 Valid Number
66 😄 Plus One ⭐️
67 😄 Add Binary ⭐️
68 😈 Text Justification
69 😎 Sqrt(x) ⭐️
70 😄 Climbing Stairs ⭐️
71 😎 Simplify Path ⭐️
72 😈 Edit Distance
73 😎 Set Matrix Zeroes
74 😎 Search a 2D Matrix
75 😎 Sort Colors
76 😈 Minimum Window Substring
77 😎 Combinations
78 😎 Subsets
79 😎 Word Search
80 😎 Remove Duplicates from Sorted Array II
81 😎 Search in Rotated Sorted Array II
82 😎 Remove Duplicates from Sorted List II
83 😄 Remove Duplicates from Sorted List ⭐️
84 😈 Largest Rectangle in Histogram
85 😈 Maximal Rectangle
86 😎 Partition List
87 😈 Scramble String
88 😄 Merge Sorted Array ⭐️
89 😎 Gray Code
90 😎 Subsets II
91 😎 Decode Ways
92 😎 Reverse Linked List II
93 😎 Restore IP Addresses
94 😎 Binary Tree Inorder Traversal ⭐️
95 😎 Unique Binary Search Trees II
96 😎 Unique Binary Search Trees
97 😈 Interleaving String
98 😎 Validate Binary Search Tree
99 😈 Recover Binary Search Tree
100 😄 Same Tree
101 😄 Symmetric Tree
102 😄 Binary Tree Level Order Traversal
103 😎 Binary Tree Zigzag Level Order Traversal
104 😄 Maximum Depth of Binary Tree
105 😎 Construct Binary Tree from Preorder and Inorder Traversal
106 😎 Construct Binary Tree from Inorder and Postorder Traversal
107 😄 Binary Tree Level Order Traversal II
108 😎 Convert Sorted Array to Binary Search Tree
109 😎 Convert Sorted List to Binary Search Tree
110 😄 Balanced Binary Tree
111 😄 Minimum Depth of Binary Tree
112 😄 Path Sum
113 😎 Path Sum II ⭐️
114 😎 Flatten Binary Tree to Linked List ⭐️
115 😈 Distinct Subsequences
116 😎 Populating Next Right Pointers in Each Node
117 😈 Populating Next Right Pointers in Each Node II
118 😄 Pascal's Triangle
119 😄 Pascal's Triangle II
120 😎 Triangle
121 😄 Best Time to Buy and Sell Stock
122 😎 Best Time to Buy and Sell Stock II
123 😈 Best Time to Buy and Sell Stock III
124 😈 Binary Tree Maximum Path Sum
125 😄 Valid Palindrome
126 😈 Word Ladder II
127 😎 Word Ladder
128 😈 Longest Consecutive Sequence
129 😎 Sum Root to Leaf Numbers ⭐️
130 😎 Surrounded Regions
131 😎 Palindrome Partitioning
132 😈 Palindrome Partitioning II
133 😎 Clone Graph
134 😎 Gas Station
135 😈 Candy
136 😄 Single Number ⭐️
137 😎 Single Number II
138 😈 Copy List with Random Pointer
139 😎 Word Break
140 😈 Word Break II
141 😄 Linked List Cycle ⭐️
142 😎 Linked List Cycle II
143 😎 Reorder List
144 😎 Binary Tree Preorder Traversal ⭐️
145 😈 Binary Tree Postorder Traversal ⭐️
146 😈 LRU Cache
147 😎 Insertion Sort List
148 😎 Sort List
149 😈 Max Points on a Line
150 😎 Evaluate Reverse Polish Notation
151 😎 Reverse Words in a String
152 😎 Maximum Product Subarray
153 😎 Find Minimum in Rotated Sorted Array ⭐️
154 😈 Find Minimum in Rotated Sorted Array II
155 😄 Min Stack ⭐️
156 😎 🔒Binary Tree Upside Down
157 😄 🔒Read N Characters Given Read4
158 😈 🔒Read N Characters Given Read4 II - Call multiple times
159 😈 🔒Longest Substring with At Most Two Distinct Characters
160 😄 Intersection of Two Linked Lists ⭐️
161 😎 🔒One Edit Distance
162 😎 Find Peak Element
163 😎 🔒Missing Ranges
164 😈 Maximum Gap
165 😄 Compare Version Numbers ⭐️
166 😎 Fraction to Recurring Decimal
167 😎 Two Sum II - Input array is sorted
168 😄 Excel Sheet Column Title ⭐️ ⭐️
169 😄 Majority Element
170 😄 🔒Two Sum III - Data structure design
171 😄 Excel Sheet Column Number ⭐️ ⭐️
172 😄 Factorial Trailing Zeroes ⭐️
173 😎 Binary Search Tree Iterator
174 😈 Dungeon Game
179 😎 Largest Number ⭐️
186 😎 🔒Reverse Words in a String II
187 😎 Repeated DNA Sequences
188 😈 Best Time to Buy and Sell Stock IV
189 😄 Rotate Array ⭐️
190 😄 Reverse Bits ⭐️
191 😄 Number of 1 Bits ⭐️
198 😄 House Robber ⭐️
199 😎 Binary Tree Right Side View ⭐️
200 😎 Number of Islands ⭐️
201 😎 Bitwise AND of Numbers Range
202 😄 Happy Number ⭐️
203 😄 Remove Linked List Elements ⭐️
204 😄 Count Primes ⭐️
205 😄 Isomorphic Strings ⭐️
206 😄 Reverse Linked List ⭐️
207 😎 Course Schedule
208 😎 Implement Trie (Prefix Tree)
209 😎 Minimum Size Subarray Sum
210 😎 Course Schedule II
211 😎 Add and Search Word - Data structure design
212 😈 Word Search II
213 😎 House Robber II
214 😈 Shortest Palindrome
215 😎 Kth Largest Element in an Array
216 😎 Combination Sum III
217 😄 Contains Duplicate ⭐️
218 😈 The Skyline Problem
219 😄 Contains Duplicate II ⭐️
220 😎 Contains Duplicate III
221 😎 Maximal Square
222 😎 Count Complete Tree Nodes ⭐️
223 😄 Rectangle Area ⭐️
224 😈 Basic Calculator
225 😄 Implement Stack using Queues ⭐️
226 😄 Invert Binary Tree ⭐️
227 😎 Basic Calculator II
228 😎 Summary Ranges
229 😎 Majority Element II ⭐️
230 😎 Kth Smallest Element in a BST ⭐️
231 😄 Power of Two ⭐️
232 😄 Implement Queue using Stacks ⭐️
233 😈 Number of Digit One ⭐️
234 😄 Palindrome Linked List ⭐️
235 😄 Lowest Common Ancestor of a Binary Search Tree ⭐️
236 😎 Lowest Common Ancestor of a Binary Tree
237 😄 Delete Node in a Linked List ⭐️
238 😎 Product of Array Except Self ⭐️
239 😈 Sliding Window Maximum
240 😎 Search a 2D Matrix II
241 😎 Different Ways to Add Parentheses
242 😄 Valid Anagram ⭐️
243 😄 🔒Shortest Word Distance
244 😎 🔒Shortest Word Distance II
245 😎 🔒Shortest Word Distance III
246 😄 🔒Strobogrammatic Number
247 😎 🔒Strobogrammatic Number II
248 😈 🔒Strobogrammatic Number III
249 😄 🔒Group Shifted Strings
250 😎 🔒Count Univalue Subtrees
251 😎 🔒Flatten 2D Vector
252 😄 🔒Meeting Rooms
253 😎 🔒Meeting Rooms II
254 😎 🔒Factor Combinations
255 😎 🔒Verify Preorder Sequence in Binary Search Tree
256 😎 🔒Paint House
257 😄 Binary Tree Paths ⭐️
258 😄 Add Digits ⭐️
259 😎 🔒3Sum Smaller
260 😎 Single Number III
261 😎 🔒Graph Valid Tree
263 😄 Ugly Number ⭐️
264 😎 Ugly Number II
265 😈 🔒Paint House II
266 😄 🔒Palindrome Permutation
267 😎 🔒Palindrome Permutation II
268 😎 Missing Number ⭐️
269 😈 🔒Alien Dictionary
270 😄 🔒Closest Binary Search Tree Value
271 😎 🔒Encode and Decode Strings
272 😈 🔒Closest Binary Search Tree Value II
273 😈 Integer to English Words
274 😎 H-Index
275 😎 H-Index II
276 😄 🔒Paint Fence
277 😎 🔒Find the Celebrity
278 😄 First Bad Version ⭐️
279 😎 Perfect Squares
280 😎 🔒Wiggle Sort
281 😎 🔒Zigzag Iterator
282 😈 Expression Add Operators
283 😄 Move Zeroes ⭐️
284 😎 Peeking Iterator
285 😎 🔒Inorder Successor in BST
286 😎 🔒Walls and Gates
287 😈 Find the Duplicate Number
288 😄 🔒Unique Word Abbreviation
289 😎 Game of Life
290 😄 Word Pattern
291 😈 🔒Word Pattern II
292 😄 Nim Game
293 😄 🔒Flip Game
294 😎 🔒Flip Game II
295 😈 Find Median from Data Stream
296 😈 🔒Best Meeting Point
297 😈 Serialize and Deserialize Binary Tree
298 😎 🔒Binary Tree Longest Consecutive Sequence
299 😄 Bulls and Cows
300 😎 Longest Increasing Subsequence
301 😈 Remove Invalid Parentheses
302 😈 🔒Smallest Rectangle Enclosing Black Pixels
303 😄 Range Sum Query - Immutable ⭐️
304 😎 Range Sum Query 2D - Immutable
305 😈 🔒Number of Islands II
306 😎 Additive Number
307 😎 Range Sum Query - Mutable
308 😈 🔒Range Sum Query 2D - Mutable
309 😎 Best Time to Buy and Sell Stock with Cooldown
310 😎 Minimum Height Trees
311 😎 🔒Sparse Matrix Multiplication
312 😈 Burst Balloons
313 😎 Super Ugly Number
314 😎 🔒Binary Tree Vertical Order Traversal
315 😈 Count of Smaller Numbers After Self
316 😈 Remove Duplicate Letters
317 😈 🔒Shortest Distance from All Buildings
318 😎 Maximum Product of Word Lengths
319 😎 Bulb Switcher
320 😎 🔒Generalized Abbreviation
321 😈 Create Maximum Number
322 😎 Coin Change
323 😎 🔒Number of Connected Components in an Undirected Graph
324 😎 Wiggle Sort II
325 😎 🔒Maximum Size Subarray Sum Equals k
326 😄 Power of Three ⭐️
327 😈 Count of Range Sum
328 😎 Odd Even Linked List ⭐️
329 😈 Longest Increasing Path in a Matrix
330 😈 Patching Array
331 😎 Verify Preorder Serialization of a Binary Tree ⭐️
332 😎 Reconstruct Itinerary
333 😎 🔒Largest BST Subtree
334 😎 Increasing Triplet Subsequence
335 😈 Self Crossing
336 😈 Palindrome Pairs
337 😎 House Robber III
338 😎 Counting Bits
339 😄 🔒Nested List Weight Sum
340 😈 🔒Longest Substring with At Most K Distinct Characters
341 😎 Flatten Nested List Iterator
342 😄 Power of Four ⭐️
343 😎 Integer Break
344 😄 Reverse String ⭐️
345 😄 Reverse Vowels of a String ⭐️
346 😄 🔒Moving Average from Data Stream
347 😎 Top K Frequent Elements
348 😎 🔒Design Tic-Tac-Toe
349 😄 Intersection of Two Arrays ⭐️
350 😄 Intersection of Two Arrays II ⭐️
351 😎 🔒Android Unlock Patterns
352 😈 Data Stream as Disjoint Intervals
353 😎 🔒Design Snake Game
354 😈 Russian Doll Envelopes
355 😎 Design Twitter
356 😎 🔒Line Reflection
357 😎 Count Numbers with Unique Digits
358 😈 🔒Rearrange String k Distance Apart
359 😄 🔒Logger Rate Limiter
360 😎 🔒Sort Transformed Array
361 😎 🔒Bomb Enemy
362 😎 🔒Design Hit Counter
363 😈 Max Sum of Rectangle No Larger Than K
364 😎 🔒Nested List Weight Sum II
365 😎 Water and Jug Problem
366 😎 🔒Find Leaves of Binary Tree
367 😎 Valid Perfect Square
368 😎 Largest Divisible Subset
369 😎 🔒Plus One Linked List
370 😎 🔒Range Addition
371 😄 Sum of Two Integers
372 😎 Super Pow
373 😎 Find K Pairs with Smallest Sums
374 😄 Guess Number Higher or Lower
375 😎 Guess Number Higher or Lower II
376 😎 Wiggle Subsequence
377 😎 Combination Sum IV
378 😎 Kth Smallest Element in a Sorted Matrix
379 😎 🔒Design Phone Directory
380 😈 Insert Delete GetRandom O(1)
381 😈 Insert Delete GetRandom O(1) - Duplicates allowed
382 😎 Linked List Random Node
383 😄 Ransom Note
384 😎 Shuffle an Array
385 😎 Mini Parser
386 😎 Lexicographical Numbers
387 😄 First Unique Character in a String
388 😎 Longest Absolute File Path
389 😄 Find the Difference
390 😎 Elimination Game
391 😈 Perfect Rectangle
392 😎 Is Subsequence
393 😎 UTF-8 Validation
394 😎 Decode String
395 😎 Longest Substring with At Least K Repeating Characters
396 😄 Rotate Function
397 😄 Integer Replacement
398 😎 Random Pick Index
399 😎 Evaluate Division

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My LeetCode Solutions, mostly in JavaScript

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