1533

import java.util.*;

public class Main {
    public static void main(String[] Args) {
        Scanner scan = new Scanner(System.in);
        int n, a[], x;
        while (true) {
            n = scan.nextInt();
            if (n == 0) {
                break;
            }
            a = new int[n]; x = 0;
            for (int i = 0; i < n; i++) {
                a[i] = scan.nextInt();
                if (a[x] < a[i]) {
                    x = i;
                }
            }
            a[x] = 0;
            for (int i = 0; i < n; i++) {
                if (a[x] < a[i]) {
                    x = i;
                }
            }
            System.out.println(x + 1);
        }
    }
}