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43 lines
1.0 KiB
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43 lines
1.0 KiB
HTML
<p>给你一个由 <code>'1'</code>（陆地）和 <code>'0'</code>（水）组成的的二维网格，请你计算网格中岛屿的数量。</p>
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<p>岛屿总是被水包围，并且每座岛屿只能由水平方向和/或竖直方向上相邻的陆地连接形成。</p>
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<p>此外，你可以假设该网格的四条边均被水包围。</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>grid = [
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["1","1","1","1","0"],
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["1","1","0","1","0"],
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["1","1","0","0","0"],
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["0","0","0","0","0"]
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]
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<strong>输出：</strong>1
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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>grid = [
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["1","1","0","0","0"],
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["1","1","0","0","0"],
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["0","0","1","0","0"],
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["0","0","0","1","1"]
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]
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<strong>输出：</strong>3
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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>m == grid.length</code></li>
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<li><code>n == grid[i].length</code></li>
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<li><code>1 <= m, n <= 300</code></li>
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<li><code>grid[i][j]</code> 的值为 <code>'0'</code> 或 <code>'1'</code></li>
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</ul>
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