import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    static int N = 100010;
    static int n;
    static int[] a = new int[N];

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        n = Integer.parseInt(br.readLine());
        String[] s = br.readLine().split(" ");
        for(int i = 1;i <= n;i++) a[i] = Integer.parseInt(s[i - 1]); 
        long max = Integer.MIN_VALUE;
        int depth = 0;
        for(int d = 1, i = 1;i <= n;d++, i *= 2) {//d:层数,i:该层的起始节点
            long sum = 0;//当前层的权值和
            for(int j = i;j < i + (1 << d - 1) && j <= n;j++) {//遍历该层
                sum += a[j];
            }
            if(sum > max) {
                max = sum;
                depth = d;
            }
        }
        System.out.println(depth);
    }
}