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36 lines
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36 lines
1.0 KiB
HTML
<p>给定一个长度为偶数的整数数组 <code>arr</code>，只有对 <code>arr</code> 进行重组后可以满足 “对于每个 <code>0 <= i < len(arr) / 2</code>，都有 <code>arr[2 * i + 1] = 2 * arr[2 * i]</code>” 时，返回 <code>true</code>；否则，返回 <code>false</code>。</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>arr = [3,1,3,6]
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<strong>输出：</strong>false
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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>arr = [2,1,2,6]
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<strong>输出：</strong>false
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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>arr = [4,-2,2,-4]
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<strong>输出：</strong>true
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<strong>解释：</strong>可以用 [-2,-4] 和 [2,4] 这两组组成 [-2,-4,2,4] 或是 [2,4,-2,-4]
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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 <= arr.length <= 3 * 10<sup>4</sup></code></li>
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<li><code>arr.length</code> 是偶数</li>
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<li><code>-10<sup>5</sup> <= arr[i] <= 10<sup>5</sup></code></li>
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</ul>
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