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https://leetcode.com/problems/subsets/ Subsets - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com 1. Backtracking class Solution { public: vector subsets(vector& nums) { backtracking(nums, 0); return result; } private: vector result; vector saved; void backtracking(vector& nums, int..