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permute

Given an array <code>nums</code> of distinct integers, return all the possible permutations. You can return the answer in any order.

&nbsp;
Example 1:
<pre>Input: nums = [1,2,3]
Output: [[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]]
</pre>Example 2:
<pre>Input: nums = [0,1]
Output: [[0,1],[1,0]]
</pre>Example 3:
<pre>Input: nums = [1]
Output: [[1]]
</pre>
&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= nums.length &lt;= 6</code></li>
	<li><code>-10 &lt;= nums[i] &lt;= 10</code></li>
	<li>All the integers of <code>nums</code> are unique.</li>
</ul>

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