import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;

import static java.util.Comparator.reverseOrder;


public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] list = new int[]{1,2,4,8,16,32,64,128};
        for (int i = 0; i < 8; i++) {
            if (list[i] > n) {
                System.out.println(list[i-1]);
                return;
            }
        }
    }
}
/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