#include<iostream>
#include<string>
using namespace std;
int n;
double a[105];
int main()
{
	cin >> n;
	double sum = 0;
	for (int i = 0; i < n; i++)cin >> a[i],sum+=a[i];
	sum =sum/(1.0* n);
	int ans = 0,min=1000000.0;
	for (int i = 0; i < n; i++)
	{
		if (fabs(a[i] - sum) < min)min = abs(a[i] - sum), ans = i;
	}
	cout << ans << endl;
	return 0;
}