import java.util.Scanner;

public class Main {

    public static void main (String [] args){
        Scanner sc = new Scanner(System.in);
        int N =sc.nextInt();
        if(N==1){
            System.out.println(1);
        }else{
            int ans =0;
            for (int i=2;i<=N;i=i*2){
                ans=i;
            }
            System.out.println(ans);
        }
    }
}

/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