#include <bits/stdc++.h>
using namespace std;

int main()
{  
   int n;
   cin>>n;
   int a[n];
   double sum=0;
   for(int i=0;i<n;i++){
       cin>>a[i];
       sum+=a[i];
   }
   double ave=sum/n;
   double diff=1000;
   int ans=0;
   for(int i=0;i<n;i++){
       if(abs(a[i]-ave)<diff){
           ans=i;
           diff=abs(a[i]-ave);
       }
   }
   cout<<ans<<endl;

} 
