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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. void getAns(string nums, vector <vector <char>> &ans, vector <char> &row, int ptr){
  5.         if (ptr == nums.length()){
  6.             ans.push_back(row);
  7.             return;
  8.         }
  9.         row.push_back(nums[ptr]);
  10.         getAns(nums, ans, row, ptr+1);
  11.         row.pop_back();
  12.         getAns(nums, ans, row, ptr+1);
  13.     }
  14. vector<vector<char>> subsets(string nums) {
  15.         vector <vector <char>> ans;
  16.         vector <char> row;
  17.         getAns(nums, ans, row, 0);
  18.         return ans;
  19.     }
  20.  
  21. int main() {
  22. 	string nums="abcd";
  23. 	vector<vector<char>> vv;
  24. 	vv=subsets(nums);
  25. 	return 0;
  26. }
Success #stdin #stdout 0s 5348KB
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https://ideone.com/rRDeQr
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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