#include <bits/stdc++.h>
using namespace std;
int main() {
  int N;
  vector<int> a(N);
  for (auto& t : a) cin >> t;
  int sum = 0;
  for (auto& t : a) sum += t;
  int res = 0, dif = 1000000000;
  for (int i = 0; i < N; i++) {
    int sub = abs(sum - N * a[i]);
    if (sub < dif) {
      res = i;
      dif = sub;
    }
  }
  cout << res << endl;
}
