import java.io.*;
import java.util.Scanner;


public class Main {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		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 = Integer.MAX_VALUE;
		int mini = 0;
		for (int i = 0; i < n; i++) {
			int tmp = Math.abs(n * a[i] - sum);
			if (tmp < min) {
				min = tmp;
				mini = i;
			}
		}
		
		pr.println(mini);
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);
			
		solve();
			
		pr.close();
		sc.close();
	}

	static class Printer extends PrintWriter {
		Printer(OutputStream out) {
			super(out);
		}
	}
}
