#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int sum;
  vector<int> a(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    sum += a[i];
  }
  int ret = 0;
  int min = 10000;
  for (int i = 0; i < n; i++) {
    double dif = abs((double)a[i] - (double)sum / n);
    if (dif < min) {
      min = dif;
      ret = i;
    }
  }
  cout << ret << endl;
}
