import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int []a = new int[n];
		int sum = 0;
		for(int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
			sum += a[i];
		}
		int min = 100000000;
		int id = 0;
		for(int i = 0; i < n; i++) {
			if(min > Math.abs(sum - n * a[i])) {
				min = Math.abs(sum - n * a[i]);
				id = i;
			}
		}
		System.out.println(id);

	}
}