fork download
copy 
  1. #include <bits/stdc++.h>
  2. #define MOD 1000000007
  3. #define Tran_Hoan_Thien ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
  4. #define fi first
  5. #define se second
  6. #define pb push_back
  7. #define vi vector<int>
  8. #define ll long long
  9. #define vll vector<ll>
  10. #define db double
  11. #define pii pair<int,int>
  12. using namespace std;
  13. int main(){
  14.     freopen("CHIAMANG.INP","r",stdin);
  15.     freopen("CHIAMANG.OUT","w",stdout);
  16.     Tran_Hoan_Thien;
  17.     int n;cin>>n;
  18.     vi a(n);
  19.     for(int &x:a) cin>>x;
  20.     ll sum=0;
  21.     for(int i=0;i<n;i++){
  22.         sum+=a[i];
  23.     }
  24.     ll s=0;
  25.     for(int i=0;i<n-1;i++){
  26.         s+=a[i];
  27.         if(s==sum-s){
  28.             cout<<i+1;
  29.             return 0;
  30.         }
  31.     }
  32.     cout<<0;
  33.     return 0;  
  34. }
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/qVMHWY
language:
C++14 (gcc 8.3)
created:
9 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!