#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  vector<int> a(n);
  int sum = 0;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    sum += a[i];
  }
  int d = 1e9;
  int ans;
  for (int i = 0; i < n; i++) {
    if (d > abs(sum - a[i] * n)) {
      ans = i;
    }
  }
  cout << ans << endl;
}
