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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int n, a[10001], s, f[1000009];
  5.  
  6. int main(){
  7.     cin >> n >> s;
  8.     for(int i = 1; i <= n; ++i)
  9.         cin >> a[i];
  10.     f[0] = 0;
  11.     for(int i = 1; i <= s; ++i){
  12.         f[i] = INT_MAX;
  13.         for(int j = 1; j <= n; ++j){
  14.             int x = i - a[j];
  15.             if(x == 0)
  16.                 f[i] = 1;
  17.             else if(x > 0 && f[x] != 0){
  18.                 f[i] = min(f[x] + 1, f[i]);
  19.             }
  20.         }
  21.         if(f[i] == INT_MAX)
  22.             f[i] = 0;
  23.     }
  24.     if(f[s] == 0)
  25.         cout << -1;
  26.     else
  27.         cout << f[s];
  28.     return 0;
  29. }
Success #stdin #stdout 0s 5284KB
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stdin
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Standard input is empty
stdout
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-1
https://ideone.com/hDjM1K
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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