import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        @SuppressWarnings("resource")
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int max = 0;
        int num = 1;
        for (int i = 1 ; i <= n ; i++) {
            int x = i;
            int count = 0;
            while (x % 2 == 0) {
                count++;
                x /= 2;
            }
            if (count > max) {
                num = i;
                max = count;
            }
        }
        System.out.println(num);
    }

}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz