leetcode--Word Search
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Given a 2D board and a word, find if the word exists in the grid.
The word can be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or vertically neighboring. The same letter cell may not be used more than once.
For example,
Given board =
[ ["ABCE"], ["SFCS"], ["ADEE"]]word =
"ABCCED"
, -> returns true
,word =
"SEE"
, -> returns true
,word = "ABCB"
, -> returns false
.
题意:给定一个二维数组,数组中存储着英文字符,判断某个英文序列,能否在数组中按照某个顺序找到。
每个字符只能被使用一次,每次只能向相邻的字符移动。
分类:数组,回溯
解法1:回溯,没有什么好说的,关键是边界判断。
原文链接http://blog.csdn.net/crazy__chen/article/details/46425207
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