Leetcode刷题笔记(c++)

class Solution {
public:
    vector> out;
    int n=0;
    void dfs(vector& nums,int i){
        int n_temp=out.size();
        out.push_back({nums[i]});
        for(int j=0;j
            out.push_back(out[j]);
            out.back().push_back(nums[i]);
        }
    }
    vector> subsets(vector& nums) {
        int n=nums.size();
        for(int i=0;i
            dfs(nums,i);
        }
        out.push_back({});
        return out;
    }
};