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38 lines
1.7 KiB
HTML
38 lines
1.7 KiB
HTML
<p>An <code>n x n</code> grid is composed of <code>1 x 1</code> squares where each <code>1 x 1</code> square consists of a <code>'/'</code>, <code>'\'</code>, or blank space <code>' '</code>. These characters divide the square into contiguous regions.</p>
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<p>Given the grid <code>grid</code> represented as a string array, return <em>the number of regions</em>.</p>
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<p>Note that backslash characters are escaped, so a <code>'\'</code> is represented as <code>'\\'</code>.</p>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2018/12/15/1.png" style="width: 200px; height: 200px;" />
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<pre>
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<strong>Input:</strong> grid = [" /","/ "]
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<strong>Output:</strong> 2
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</pre>
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<p><strong class="example">Example 2:</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2018/12/15/2.png" style="width: 200px; height: 198px;" />
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<pre>
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<strong>Input:</strong> grid = [" /"," "]
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<strong>Output:</strong> 1
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</pre>
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<p><strong class="example">Example 3:</strong></p>
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<img alt="" src="https://assets.leetcode.com/uploads/2018/12/15/4.png" style="width: 200px; height: 200px;" />
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<pre>
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<strong>Input:</strong> grid = ["/\\","\\/"]
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<strong>Output:</strong> 5
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<strong>Explanation: </strong>Recall that because \ characters are escaped, "\\/" refers to \/, and "/\\" refers to /\.
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>n == grid.length == grid[i].length</code></li>
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<li><code>1 <= n <= 30</code></li>
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<li><code>grid[i][j]</code> is either <code>'/'</code>, <code>'\'</code>, or <code>' '</code>.</li>
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</ul>
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