#include <bits/stdc++.h>
int main(void) {
  int N, a[100], MIN, i, u, v;
  double sum = 0, ave, min = 100;
  u = scanf("%d", &N);
  for (i = 0; i < N; i++) {
    v = scanf("%d", &a[i]);
    sum += a[i];
  }
  ave = sum / (double)N;
  for (i = N - 1; i >= 0; i--) {
    if (a[i] >= ave) {
      if (min >= a[i] - ave) {
        min = a[i] - ave;
        MIN = i;
      }
    } else {
      if (min > ave - a[i]) {
        min = ave - a[i];
        MIN = i;
      }
    }
  }
  printf("%d", MIN);
  return 0;
}
