Given an integer array nums of unique elements, return all possible subsets (the power set).
The solution set must not contain duplicate subsets. Return the solution in any order.
\n\n\n
Example 1:
\n\n\nInput: nums = [1,2,3]\nOutput: [[],[1],[2],[1,2],[3],[1,3],[2,3],[1,2,3]]\n\n\n
Example 2:
\n\n\nInput: nums = [0]\nOutput: [[],[0]]\n\n\n
\n
Constraints:
\n\n1 <= nums.length <= 10-10 <= nums[i] <= 10nums are unique.给你一个整数数组 nums ，数组中的元素 互不相同 。返回该数组所有可能的子集（幂集）。
解集 不能 包含重复的子集。你可以按 任意顺序 返回解集。
\n\n\n\n
示例 1：
\n\n\n输入：nums = [1,2,3]\n输出：[[],[1],[2],[1,2],[3],[1,3],[2,3],[1,2,3]]\n\n\n
示例 2：
\n\n\n输入：nums = [0]\n输出：[[],[0]]\n\n\n
\n\n
提示：
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