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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. const int Mod=1e9+7;
  5. const ll INF = 10000000000000;
  6. const int N = 1e6+1;
  7.  
  8. void solve() {
  9.    ll n,x;
  10.    cin >> n >> x;
  11.    vector<int> a(n+1);
  12.    for(int i=1;i<=n;i++) cin >> a[i];
  13.    vector<ll> dp(N,INF);
  14.    for(int i=1;i<=n;i++) dp[a[i]]=1;
  15.    for(int i=1;i<N;++i){
  16.       for(int j=1;j<=n;j++){
  17.         if(dp[i]!=INF){
  18.             dp[i+a[j]]=min(dp[i+a[j]],dp[i]+1);
  19.         }
  20.       }
  21.    }
  22.    if(dp[x]==INF) cout << -1;
  23.    else cout << dp[x];
  24. }       
  25.  
  26. int main(){ 
  27.     ios::sync_with_stdio(false);
  28.     cin.tie(nullptr);
  29.  
  30.     /*int t;
  31.     cin >> t;
  32.     while (t--)*/ solve();
  33.  
  34.  
  35.     return 0;
  36. }
  37.  
Success #stdin #stdout 0.01s 11168KB
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stdin
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3 11
1 5 7
stdout
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3
https://ideone.com/hCIaL0
language:
C++ (gcc 8.3)
created:
9 days ago
visibility:
public

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