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<p>给你一个整数数组 <code>nums</code> ,数组中的元素 <strong>互不相同</strong> 。返回该数组所有可能的子集(幂集)。</p>
<p>解集 <strong>不能</strong> 包含重复的子集。你可以按 <strong>任意顺序</strong> 返回解集。</p>
<p> </p>
<p><strong>示例 1</strong></p>
<pre>
<strong>输入:</strong>nums = [1,2,3]
<strong>输出:</strong>[[],[1],[2],[1,2],[3],[1,3],[2,3],[1,2,3]]
</pre>
<p><strong>示例 2</strong></p>
<pre>
<strong>输入:</strong>nums = [0]
<strong>输出:</strong>[[],[0]]
</pre>
<p> </p>
<p><strong>提示:</strong></p>
<ul>
<li><code>1 <= nums.length <= 10</code></li>
<li><code>-10 <= nums[i] <= 10</code></li>
<li><code>nums</code> 中的所有元素 <strong>互不相同</strong></li>
</ul>