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40 lines
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40 lines
1.4 KiB
HTML
<p>给定一个 <code>m x n</code> 二维字符网格 <code>board</code> 和一个字符串单词 <code>word</code> 。如果 <code>word</code> 存在于网格中，返回 <code>true</code> ；否则，返回 <code>false</code> 。</p>
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<p>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不允许被重复使用。</p>
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<p> </p>
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<p>例如，在下面的 3×4 的矩阵中包含单词 "ABCCED"（单词中的字母已标出）。</p>
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<p><img alt="" src="https://assets.leetcode.com/uploads/2020/11/04/word2.jpg" style="width: 322px; height: 242px;" /></p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre>
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<strong>输入：</strong>board = [["A","B","C","E"],["S","F","C","S"],["A","D","E","E"]], word = "ABCCED"
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<strong>输出：</strong>true
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre>
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<strong>输入：</strong>board = [["a","b"],["c","d"]], word = "abcd"
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<strong>输出：</strong>false
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</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>1 <= board.length <= 200</code></li>
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<li><code>1 <= board[i].length <= 200</code></li>
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<li><code>board</code> 和 <code>word</code> 仅由大小写英文字母组成</li>
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</ul>
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<p> </p>
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<p><strong>注意：</strong>本题与主站 79 题相同：<a href="https://leetcode-cn.com/problems/word-search/">https://leetcode-cn.com/problems/word-search/</a></p>
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