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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. void fn(vector<int>&v,int k,int n,vector<vector<int>>&ans){
  5. 	if(k==n)
  6. 	return;
  7.  
  8. 	vector<int>temp;
  9. 	for(int i=k;i<n;i++){
  10. 		temp.push_back(v[i]);
  11. 		ans.push_back(temp);
  12. 		fn(v,k+1,n,ans);
  13. 	}
  14. }
  15.  
  16. int main() {
  17. 	vector<int>v={1,2,3};
  18. 	int n=3;
  19. 	vector<vector<int>>ans;
  20. 	fn(v,0,3,ans);
  21. 	for(int i=0;i<ans.size();i++){
  22. 		for(int j=0;j<ans[0].size();j++)
  23. 		cout<<ans[i][j]<<" ";
  24. 		cout<<endl;
  25. 	}
  26. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/Db824K
language:
C++ (gcc 8.3)
created:
14 days ago
visibility:
public

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