import java.util.Arrays;
import java.util.Scanner;
class Main{
    private static int n;
    private static int[] a = new int[100010];
    public static void main(String[] args){
        Scanner input = new Scanner(System.in);
        n = input.nextInt();
        for(int i = 1; i <= n; i ++)a[i] = input.nextInt();
        int MAXH = n;
        long MAXW = -(long)Math.pow(10, 18);
        int h = (int) (Math.log(n)/Math.log(2)) + 1;
        for(int i = 1; i <= h; i ++) {
            long w = 0;
            for(int j = 1; j <= n; j ++) {
                int nh = (int) (Math.log(j)/Math.log(2)) + 1;
                if(nh == i) {
                    w += (long)a[j];
                }
                if(nh > i) break;
            }
            if(w > MAXW) {
                MAXW = w;
                MAXH = i;
            }
        }
        System.out.println(MAXH);
    }
}