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Leetcode 前 300 题算法题解析（Java）
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211. Add and Search Word - Data structure design

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    • Introduction
    • leetcode 100 斩！回顾
    • leetcode 力扣刷题 1 到 300 的感受
    • 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
    • 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. Find First and Last Position of Element in Sorted Array
    • 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 题到 200 题
      • 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
      • 160. Intersection of Two Linked Lists
      • 162. Find Peak Element
      • 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
      • 171. Excel Sheet Column Number
      • 172. Factorial Trailing Zeroes
      • 173. Binary Search Tree Iterator
      • 174*. Dungeon Game
      • 179. Largest Number
      • 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 题到 300 题
      • 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
      • 257. Binary Tree Paths
      • 258. Add Digits
      • 260. Single Number III
      • 263. Ugly Number
      • 264. Ugly Number II
      • 268. Missing Number
      • 273. Integer to English Words
      • 274. H-Index
      • 275. H-Index II
      • 278. First Bad Version
      • 279. Perfect Squares
      • 282. Expression Add Operators
      • 283. Move Zeroes
      • 284. Peeking Iterator
      • 287*. Find the Duplicate Number
      • 289*. Game of Life
      • 290. Word Pattern
      • 292*. Nim Game
      • 295*. Find Median from Data Stream
      • 297. Serialize and Deserialize Binary Tree
      • 299. Bulls and Cows
      • 300. Longest Increasing Subsequence
    • 更多
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