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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int n, a[10001], s;
  5. long long f[1000009];
  6.  
  7. int main(){
  8.     cin >> n >> s;
  9.     for(int i = 1; i <= n; ++i)
  10.         cin >> a[i];
  11.     f[0] = 0;
  12.     for(int i = 1; i <= s; ++i){
  13.         f[i] = LLONG_MAX;
  14.         for(int j = 1; j <= n; ++j){
  15.             int x = i - a[j];
  16.             if(x >= 0 && f[x] != LLONG_MAX){
  17.                 f[i] = min(f[x] + 1, f[i]);
  18.             }
  19.         }
  20.     }
  21.     if(f[s] == LLONG_MAX)
  22.         cout << -1;
  23.     else
  24.         cout << f[s];
  25.     return 0;
  26. }
  27.  
Success #stdin #stdout 0.01s 5252KB
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stdout
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https://ideone.com/5Iof6w
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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