All Projects → yubinbai → Leetcode

yubinbai / Leetcode

Licence: gpl-3.0
Solutions to Leetcode Online Judge

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Leetcode solutions in C++, Java, Python

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