LeetCode 题解

数组问题

• LeetCode 283.Move Zeroes
• LeetCode 27.Remove Element
• LeetCode 26. Remove Duplicates from Sorted Array
• LeetCode 80. Remove Duplicates from Sorted Array II
• LeetCode 75. Sort Colors
• LeetCode 88. Merge Sorted Array
• LeetCode 215. Kth Largest Element in an Array
• LeetCode 125. Valid Palindrome
• LeetCode 344. Reverse String
• LeetCode 345. Reverse Vowels of a String
• LeetCode 11. Container With Most Water
• LeetCode 42. Trapping Rain Water
• LeetCode 209. Minimum Size Subarray Sum
• LeetCode 3. Longest Substring Without Repeating Characters
• LeetCode 438. Find All Anagrams in a String
• LeetCode 76. Minimum Window Substring

查找表HashMap相关问题

• LeetCode 350. Intersection of Two Arrays II
• LeetCode 242. Valid Anagram
• LeetCode 202. Happy Number
• LeetCode 290. Word Pattern
• LeetCode 205. Isomorphic Strings
• LeetCode 451. Sort Characters By Frequency
• LeetCode 15. 3Sum
• LeetCode 18. 4Sum
• LeetCode 16. 3Sum Closest
• LeetCode 454. 4Sum II
• LeetCode 49. Group Anagrams
• LeetCode 447. Number of Boomerangs
• LeetCode 217. Contains Duplicate
• LeetCode 219. Contains Duplicate II
• LeetCode 220. Contains Duplicate III

链表问题

• LeetCode 206. Reverse Linked List
• LeetCode 92. Reverse Linked List II
• LeetCode 86. Partition List
• LeetCode 328. Odd Even Linked List
• LeetCode 2. Add Two Numbers
• LeetCode 445. Add Two Numbers II
• LeetCode 66. Plus One
• LeetCode 203. Remove Linked List Elements
• LeetCode 82. Remove Duplicates from Sorted List II
• LeetCode 83. Remove Duplicates from Sorted List
• LeetCode 21. Merge Two Sorted Lists
• LeetCode 24. Swap Nodes in Pairs
• LeetCode 25. Reverse Nodes in k-Group
• LeetCode 147. Insertion Sort List
• LeetCode 148. Sort List
• LeetCode 19. Remove Nth Node From End of List
• LeetCode 61. Rotate List
• LeetCode 143. Reorder List
• LeetCode 234. Palindrome Linked List

栈，队列，堆以及DFS,BFS

• LeetCode 20. Valid Parentheses
• LeetCode 150. Evaluate Reverse Polish Notation
• LeetCode 71. Simplify Path
• LeetCode 144. Binary Tree Preorder Traversal
• LeetCode 94. Binary Tree Inorder Traversal
• LeetCode 145. Binary Tree Postorder Traversal
• LeetCode 341. Flatten Nested List Iterator
• LeetCode 102. Binary Tree Level Order Traversal
• LeetCode 107. Binary Tree Level Order Traversal II
• LeetCode 103. Binary Tree Zigzag Level Order Traversal
• LeetCode 199. Binary Tree Right Side View
• LeetCode 279. Perfect Squares
• LeetCode 127. Word Ladder
• LeetCode 126. Word Ladder II
• LeetCode 347. Top K Frequent Elements
• LeetCode 23. Merge k Sorted Lists

二叉树及递归

• LeetCode 104. Maximum Depth of Binary Tree
• LeetCode 111. Minimum Depth of Binary Tree
• LeetCode 226. Invert Binary Tree
• LeetCode 100. Same Tree
• LeetCode 101. Symmetric Tree
• LeetCode 222. Count Complete Tree Nodes
• LeetCode 110. Balanced Binary Tree
• LeetCode 112. Path Sum
• LeetCode 404. Sum of Left Leaves
• LeetCode 257. Binary Tree Paths
• LeetCode 113. Path Sum II
• LeetCode 129. Sum Root to Leaf Numbers
• LeetCode 437. Path Sum III
• LeetCode 235. Lowest Common Ancestor of a Binary Search Tree
• LeetCode 98. Validate Binary Search Tree
• LeetCode 450. Delete Node in a BST
• LeetCode 108. Convert Sorted Array to Binary Search Tree
• LeetCode 230. Kth Smallest Element in a BST
• LeetCode 236. Lowest Common Ancestor of a Binary Tree

递归DFS和回溯

• LeetCode 17. Letter Combinations of a Phone Number
• LeetCode 93. Restore IP Addresses
• LeetCode 131. Palindrome Partitioning
• LeetCode 132. Palindrome Partitioning II
• LeetCode 46. Permutations
• LeetCode 47. Permutations II
• LeetCode 77. Combinations
• LeetCode 39. Combination Sum
• LeetCode 40. Combination Sum II
• LeetCode 216. Combination Sum III
• LeetCode 78. Subsets
• LeetCode 90. Subsets II
• LeetCode 401. Binary Watch
• LeetCode 79. Word Search
• LeetCode 200. Number of Islands
• LeetCode 130. Surrounded Regions
• LeetCode 417. Pacific Atlantic Water Flow
• LeetCode 51. N-Queens
• LeetCode 52. N-Queens II
• LeetCode 36. Valid Sudoku
• LeetCode 37. Sudoku Solver

动态规划

• LeetCode 70. Climbing Stairs
• LeetCode 120. Triangle
• LeetCode 64. Minimum Path Sum
• LeetCode 343. Integer Break
• LeetCode 62. Unique Paths
• LeetCode 91. Decode Ways
• LeetCode 63. Unique Paths II
• LeetCode 198. House Robber
• LeetCode 213. House Robber II
• LeetCode 337. House Robber III
• LeetCode 121. Best Time to Buy and Sell Stock
• LeetCode 122. Best Time to Buy and Sell Stock II
• LeetCode 188. Best Time to Buy and Sell Stock IV
• LeetCode 416. Partition Equal Subset Sum
• LeetCode 322. Coin Change
• LeetCode 518. Coin Change 2
• LeetCode 377. Combination Sum IV
• LeetCode 474. Ones and Zeroes
• LeetCode 139. Word Break
• LeetCode 140. Word Break II
• LeetCode 494. Target Sum
• LeetCode 300. Longest Increasing Subsequence（最长递增子序列）
• LeetCode 376. Wiggle Subsequence

贪心算法

• LeetCode 455. Assign Cookies
• LeetCode 392. Is Subsequence
• LeetCode 435. Non-overlapping Intervals