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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. const int N = 1e2 + 1;
  4. int n, target, a[N], sum ;
  5. vector<int>ans ;
  6. void solve(int idx)
  7. {
  8.     if(sum > target)
  9.         return ;
  10.     if(idx == n + 1)
  11.     {
  12.         if(sum == target)
  13.         {
  14.             for(auto & x : ans)
  15.                 cout<<x<<' ' ;
  16.             cout<<'\n' ;
  17.         }
  18.         return ;
  19.     }
  20.     /// pick
  21.     sum += a[idx] ;
  22.     ans.push_back(a[idx]) ;
  23.     solve(idx + 1) ;
  24.     sum -= a[idx] ;
  25.     ans.pop_back() ;
  26.     /// leave
  27.     solve(idx + 1) ;
  28. }
  29. int main() {
  30.     cin>>n>>target ;
  31.     for(int i = 1 ; i <= n ; i++)
  32.         cin>>a[i] ;
  33.     solve(1) ;
  34.     return 0;
  35. }
  36.  
Success #stdin #stdout 0s 5288KB
comments (?)
stdin
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4 31
11 13 24 7
stdout
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11 13 7 
24 7
https://ideone.com/0pSA9U
language:
C++14 (gcc 8.3)
created:
12 hours ago
visibility:
public

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