Given an integer array nums that may contain duplicates, 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:
\nInput: nums = [1,2,2]\nOutput: [[],[1],[1,2],[1,2,2],[2],[2,2]]\n
Example 2:
\nInput: nums = [0]\nOutput: [[],[0]]\n\n
\n
Constraints:
\n\n1 <= nums.length <= 10-10 <= nums[i] <= 10给你一个整数数组 nums ，其中可能包含重复元素，请你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。返回的解集中，子集可以按 任意顺序 排列。
\n\n\n\n
示例 1：
\n\n\n输入：nums = [1,2,2]\n输出：[[],[1],[1,2],[1,2,2],[2],[2,2]]\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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