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43 lines
945 B
HTML
43 lines
945 B
HTML
<p>给定一个非负索引 <code>rowIndex</code>，返回「杨辉三角」的第 <code>rowIndex</code><em> </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> rowIndex = 3
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<strong>输出:</strong> [1,3,3,1]
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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> rowIndex = 0
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<strong>输出:</strong> [1]
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</pre>
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<p><strong>示例 3:</strong></p>
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<pre>
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<strong>输入:</strong> rowIndex = 1
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<strong>输出:</strong> [1,1]
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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>0 <= rowIndex <= 33</code></li>
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</ul>
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<p> </p>
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<p><strong>进阶：</strong></p>
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<p>你可以优化你的算法到 <code><em>O</em>(<i>rowIndex</i>)</code> 空间复杂度吗？</p>
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