LeetCodes

LeetCode 题解

本部分是LeetCode的刷题记录，我会在刷题的过程中一点一点更新上去，现所有题目使用C++进行编写，点击题目链接即可看到详细内容，欢迎读者指出不足之处，欢迎与我交流讨论！！

# Title Difficulity Language Accepted
1 Two Sum Easy C++ √
2 Add Two Numbers Medium C++ √
3 Longest Substring Without Repeating Characters Medium C++ √
4 Median of Two Sorted Arrays Hard C++ √
5 Longest Palindromic Substring Medium C++ √
6 ZigZag Conversion Easy C++ √
7 Reverse Integer Easy C++ √
8 String to Integer (atoi) Easy C++ √
9 Palindrome Number Easy C++ √
10 Regular Expression Matching Hard C++ √
11 Container With Most Water Medium C++ √
12 Integer to Roman Medium C++ √
13 Roman to Integer Easy C++ √
14 Longest Common Prefix Easy C++ √
15 3Sum Medium C++ √
16 3Sum Closest Medium C++ √
17 Letter Combinations of a Phone Number Medium C++ √
18 4Sum Medium C++ √
19 Remove Nth Node From End of List Easy C++ √
20 Valid Parentheses Easy C++ √
21 Merge Two Sorted Lists Easy C++ √
22 Generate Parentheses Medium C++ √
23 Merge k Sorted Lists Hard C++ √
24 Swap Nodes in Pairs Easy C++ √
25 Reverse Nodes in k-Group Hard C++ √
26 Remove Duplicates from Sorted Array Easy C++ √
27 Remove Element Easy C++ √
28 Implement strStr() Easy C++ √
29 Divide Two Integers Medium C++ √
30 Substring with Concatenation of All Words Hard C++ √
31 Next Permutation Medium C++ √
32 Longest Valid Parentheses Hard C++ √
33 Search in Rotated Sorted Array Hard C++ √
34 Search for a Range Medium C++ √
35 Search Insert Position Medium C++ √
36 Valid Sudoku Easy C++ √
37 Sudoku Solver Hard C++ √
38 Count and Say Easy C++ √
39 Combination Sum Medium C++ √
40 Combination Sum II Medium C++ √
41 First Missing Positive Hard C++ √
42 Trapping Rain Water Hard C++ √
43 Multiply Strings Medium C++ √
44 Wildcard Matching Hard C++ √
45 Jump Game II Hard C++ √
46 Permutations Medium C++ √
47 Permutations II Medium C++ √
48 Rotate Image Medium C++ √
49 Group Anagrams Medium C++ √
50 Pow(x, n) Medium C++ √
51 N-Queens Hard C++ √
52 N-Queens II Hard C++ √
53 Maximum Subarray Medium C++ √
54 Spiral Matrix Medium C++ √
55 Jump Game Medium C++ √
56 Merge Intervals Hard C++ √
57 Insert Interval Hard C++ √
58 Length of Last Word Easy C++ √
59 Spiral Matrix II Medium C++ √
60 Permutation Sequence Medium C++ √
61 Rotate List Medium C++ √
62 Unique Paths Medium C++ √
63 Unique Paths II Medium C++ √
64 Minimum Path Sum Medium C++ √
65 Valid Number Hard C++ √
66 Plus One Easy C++ √
67 Add Binary Easy C++ √
68 Text Justification Hard C++ √
69 Sqrt(x) Medium C++ √
70 Climbing Stairs Easy C++ √
71 Simplify Path Medium C++ √
72 Edit Distance Hard C++ √
73 Set Matrix Zeroes Medium C++ √
74 Search a 2D Matrix Medium C++ √
75 Sort Colors Medium C++ √
76 Minimum Window Substring Hard C++ √
77 Combinations Medium C++ √
78 Subsets Medium C++ √
79 Word Search Medium C++
80 Remove Duplicates from Sorted Array II Medium C++
81 Search in Rotated Sorted Array II Medium C++
82 Remove Duplicates from Sorted List II Medium C++ √
83 Remove Duplicates from Sorted List Easy C++ √
84 Largest Rectangle in Histogram Hard C++
85 Maximal Rectangle Hard C++
86 Partition List Medium C++ √
87 Scramble String Hard C++
88 Merge Sorted Array Easy C++
89 Gray Code Medium C++
90 Subsets II Medium C++
91 Decode Ways Medium C++
92 Reverse Linked List II Medium C++ √
93 Restore IP Addresses Medium C++
94 Binary Tree Inorder Traversal Medium C++ √
95 Unique Binary Search Trees II Medium C++ √
96 Unique Binary Search Trees Medium C++ √
97 Interleaving String Hard C++
98 Validate Binary Search Tree Medium C++ √
99 Recover Binary Search Tree Hard C++ √
100 Same Tree Easy C++ √
101 Symmetric Tree Easy C++ √
102 Binary Tree Level Order Traversal Easy C++ √
103 Binary Tree Zigzag Level Order Traversal Medium C++ √
104 Maximum Depth of Binary Tree Easy C++ √
105 Construct Binary Tree from Preorder and Inorder Traversal Medium C++ √
106 Construct Binary Tree from Inorder and Postorder Traversal Medium C++ √
107 Binary Tree Level Order Traversal II Easy C++ √
108 Convert Sorted Array to Binary Search Tree Medium C++ √
109 Convert Sorted List to Binary Search Tree Medium C++ √
110 Balanced Binary Tree Easy C++ √
111 Minimum Depth of Binary Tree Easy C++ √
112 Path Sum Easy C++ √
113 Path Sum II Medium C++ √
114 Flatten Binary Tree to Linked List Medium C++ √
116 Populating Next Right Pointers in Each Node Medium C++ √
117 Populating Next Right Pointers in Each Node II Hard C++ √
122 Best Time to Buy and Sell Stock II Easy C++ √
124 Binary Tree Maximum Path Sum Hard C++ √
129 Sum Root to Leaf Numbers Medium C++ √
134 Gas Station Medium C++ √
135 Candy Hard C++ √
136 Single Number Easy C++ √
137 Single Number II Medium C++ √
138 Copy List with Random Pointer Hard C++ √
141 Linked List Cycle Easy C++ √
142 Linked List Cycle II Medium C++ √
143 Reorder List Medium C++ √
144 Binary Tree Preorder Traversal Medium C++ √
145 Binary Tree Postorder Traversal Hard C++ √
147 Insertion Sort List Medium C++ √
148 Sort List Medium C++ √
160 Intersection of Two Linked Lists Easy C++ √
169 Majority Element Easy C++ √
173 Binary Search Tree Iterator Medium C++ √
174 Dungeon Game Hard C++ √
187 Repeated DNA Sequences Medium C++ √
189 Rotate Array Easy C++ √
190 Reverse Bits Easy C++ √
191 Number of 1 Bits Easy C++ √
199 Binary Tree Right Side View Medium C++ √
201 Bitwise AND of Numbers Range Medium C++ √
203 Remove Linked List Elements Easy C++ √
206 Reverse Linked List Easy C++ √
209 Minimum Size Subarray Sum Medium C++ √
215 Kth Largest Element in an Array Medium C++ √
216 Combination Sum III Medium C++ √
218 The Skyline Problem Hard C++ √
222 Count Complete Tree Nodes Medium C++ √
226 Invert Binary Tree Easy C++ √
230 Kth Smallest Element in a BST Medium C++ √
231 Power of Two Easy C++ √
234 Palindrome Linked List Easy C++ √
235 Lowest Common Ancestor of a Binary Search Tree Easy C++ √
236 Lowest Common Ancestor of a Binary Tree Medium C++ √
237 Delete Node in a Linked List Easy C++ √
239 Sliding Window Maximum Hard C++ √
240 Search a 2D Matrix II Medium C++ √
241 Different Ways to Add Parentheses Medium C++ √
257 Binary Tree Paths Easy C++ √
260 Single Number III Medium C++ √
264 Ugly Number II Medium C++ √
268 Missing Number Medium C++ √
282 Expression Add Operators Hard C++ √
289 Game of Life Medium C++ √
295 Find Median from Data Stream Hard C++ √
297 Serialize and Deserialize Binary Tree Hard C++ √
312 Burst Balloons Hard C++ √
313 Super Ugly Number Medium C++ √
315 Count of Smaller Numbers After Self Hard C++ √
316 Remove Duplicate Letters Hard C++ √
318 Maximum Product of Word Lengths Medium C++ √
321 Create Maximum Number Hard C++ √
324 Wiggle Sort II Medium C++ √
327 Count of Range Sum Hard C++ √
328 Odd Even Linked List Medium C++ √
330 Patching Array Hard C++ √
337 House Robber III Medium C++ √
338 Counting Bits Medium C++ √
342 Power of Four Easy C++ √
347 Top K Frequent Elements Medium C++ √
355 Design Twitter Medium C++ √
367 Valid Perfect Square Medium C++ √
371 Sum of Two Integers Easy C++ √
372 Super Pow Medium C++ √
373 Find K Pairs with Smallest Sums Medium C++ √
376 Wiggle Subsequence Medium C++ √
377 Combination Sum IV Medium C++ √
378 Kth Smallest Element in a Sorted Matrix Medium C++ √
389 Find the Difference Easy C++ √
392 Is Subsequence Medium C++ √
393 UTF-8 Validation Medium C++ √
397 Integer Replacement Medium C++ √
401 Binary Watch Easy C++ √
402 Remove K Digits Medium C++ √
404 Sum of Left Leaves Easy C++ √
405 Convert a Number to Hexadecimal Easy C++ √
406 Queue Reconstruction by Height Medium C++ √
407 Trapping Rain Water II Hard C++ √
415 Add Strings Easy C++ √
421 Maximum XOR of Two Numbers in an Array Medium C++ √
435 Non-overlapping Intervals Medium C++ √
437 Path Sum III Easy C++ √
445 Add Two Numbers II Medium C++ √
449 Serialize and Deserialize BST Medium C++ √
450 Delete Node in a BST Medium C++ √
451 Sort Characters By Frequency Medium C++ √
452 Minimum Number of Arrows to Burst Balloons Medium C++ √
455 Assign Cookies Easy C++ √
461 Hamming Distance Easy C++ √
477 Total Hamming Distance Medium C++ √
502 IPO Hard C++ √
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