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30 lines
720 B
HTML
30 lines
720 B
HTML
<p>给定一个非负整数 <em><code>numRows</code>，</em>生成「杨辉三角」的前 <em><code>numRows</code> </em>行。</p>
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<p><small>在「杨辉三角」中，每个数是它左上方和右上方的数的和。</small></p>
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<p><img alt="" src="https://pic.leetcode-cn.com/1626927345-DZmfxB-PascalTriangleAnimated2.gif" /></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> numRows = 5
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<strong>输出:</strong> [[1],[1,1],[1,2,1],[1,3,3,1],[1,4,6,4,1]]
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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> numRows = 1
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<strong>输出:</strong> [[1]]
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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 <= numRows <= 30</code></li>
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</ul>
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