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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define ll long long
  5.  
  6. void solve(){
  7.     ll n,mx=0;
  8.     cin>>n;
  9.     vector<ll>v(n);
  10.     for(ll i=0;i<n;i++){
  11.         cin>>v[i];
  12.         mx=max(mx,v[i]);
  13.     }
  14.  
  15.     vector<vector<ll>>dp2(n,vector<ll>(5001,0));
  16.     dp2[0][v[0]]=v[0];
  17.  
  18.     for(ll i=1;i<n;i++){
  19.         for(ll j=1;j<=5000;j++){
  20.             dp2[i][j]=dp2[i-1][j];
  21.             if(j-v[i]>=0){
  22.                 dp2[i][j]+=dp2[i-1][j-v[i]]*v[i];
  23.             }
  24.         }
  25.     }
  26.  
  27.     ll ans=0;
  28.     for(ll i=mx;i<=5000;i++){
  29.         ans+=dp2[n-1][i];
  30.     }
  31.  
  32.     cout<<ans<<"\n";
  33. }
  34.  
  35. int main(){
  36.     ios_base::sync_with_stdio(false);
  37.     cin.tie(NULL);
  38.     solve();
  39.     return 0;
  40. }
Success #stdin #stdout 0s 5304KB
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https://ideone.com/ppIK5q
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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