Given an integer array nums, return all the different possible increasing subsequences of the given array with at least two elements. You may return the answer in any order.
The given array may contain duplicates, and two equal integers should also be considered a special case of increasing sequence.
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Example 1:
\n\n\nInput: nums = [4,6,7,7]\nOutput: [[4,6],[4,6,7],[4,6,7,7],[4,7],[4,7,7],[6,7],[6,7,7],[7,7]]\n\n\n
Example 2:
\n\n\nInput: nums = [4,4,3,2,1]\nOutput: [[4,4]]\n\n\n
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Constraints:
\n\n1 <= nums.length <= 15-100 <= nums[i] <= 100给你一个整数数组 nums ，找出并返回所有该数组中不同的递增子序列，递增子序列中 至少有两个元素 。你可以按 任意顺序 返回答案。
数组中可能含有重复元素，如出现两个整数相等，也可以视作递增序列的一种特殊情况。
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示例 1：
\n\n\n输入：nums = [4,6,7,7]\n输出：[[4,6],[4,6,7],[4,6,7,7],[4,7],[4,7,7],[6,7],[6,7,7],[7,7]]\n\n\n
示例 2：
\n\n\n输入：nums = [4,4,3,2,1]\n输出：[[4,4]]\n\n\n
\n\n
提示：
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