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  1. #include<iostream>
  2. #include<string>
  3. using namespace std;
  4. string a;
  5.  
  6. void subseq(int i,string s)
  7. {
  8.     int n=a.size();
  9.     if(i==n)
  10.     {if(!s.empty())
  11.     cout<<s<<endl;return;}
  12.     subseq(i+1,s);
  13.     s.push_back(a[i]);
  14.     subseq(i+1,s);
  15. }
  16.  
  17. int main()
  18. {
  19.     int i,j,k;
  20.     cin>>a;
  21.     int n=a.size();
  22.     string s;
  23.     subseq(0,s);
  24.  
  25. }
  26.  
Success #stdin #stdout 0s 3464KB
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Standard output is empty
https://ideone.com/6HD8P9
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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