#include <bits/stdc++.h>
using namespace std;
template <class A, class B>
inline bool chmax(A &a, const B &b) {
  return b > a && (a = b, true);
}
template <class A, class B>
inline bool chmin(A &a, const B &b) {
  return b < a && (a = b, true);
}
const int INF = 1 << 30;
const int dx[] = {1, 0, -1, 0, 1, 1, -1, -1};
const int dy[] = {0, -1, 0, 1, 1, -1, -1, 1};
int main() {
  cin.tie(nullptr);
  ios::sync_with_stdio(false);
  int n;
  cin >> n;
  vector<int> a(n);
  int sum = 0;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    sum += a[i];
  }
  sum /= n;
  int minp = 0, min = INF;
  for (int i = 0; i < n; i++) {
    if (chmin(min, abs(sum - a[i]))) {
      minp = i;
    }
  }
  cout << minp << '\n';
  return (0);
}
