
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Integer num=new Scanner(System.in).nextInt();
		int nowNum=1;
		while(nowNum*2<=num) {
			nowNum*=2;
		}
		System.out.println(nowNum);
	}
}
/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