import java.util.Scanner;
class Main{
	static final Scanner s=new Scanner(System.in);
	public static void main(String[]$){
		int n=s.nextInt(),r=1;
		while(r*2<=n)
			r*=2;
		System.out.println(r);
	}
}

/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