import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc =new Scanner(System.in);
		int N=sc.nextInt();
		for(int i =0;i<=8;i++){
			if(Math.pow(2, i)<=N&&N<Math.pow(2, i+1)){
				System.out.println((int)Math.pow(2, i));
				break;
			}

		}

	}

}

/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