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Published: Jan 3, 2021 License: MIT

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单词搜索 II

给定一个 m x n 二维字符网格 board****和一个单词(字符串)列表 words,找出所有同时在二维网格和字典中出现的单词。

单词必须按照字母顺序,通过 相邻的单元格 内的字母构成,其中“相邻”单元格是那些水平相邻或垂直相邻的单元格。同一个单元格内的字母在一个单词中不允许被重复使用。

 

示例 1:

image **输入:**board = [["o","a","a","n"],["e","t","a","e"],["i","h","k","r"],["i","f","l","v"]], words = ["oath","pea","eat","rain"] **输出:**["eat","oath"]

示例 2:

image **输入:**board = [["a","b"],["c","d"]], words = ["abcb"] **输出:**[]

 

提示:

  • m == board.length
  • n == board[i].length
  • 1 4
  • 1 <= words[i].length <= 10
  • words[i] 由小写英文字母组成
  • words 中的所有字符串互不相同

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