import java.util.Scanner;
public class Main {
public static void main(String[]srgs) {
	Scanner scan=new Scanner(System.in);
	int a=scan.nextInt();
	int ans=0;
	int ansc=0;
	for(int i=1;i!=a+1;i++) {
		int count=0;
		for(int j=i;j%2==0;count++,j/=2) {}
			if(ansc<count) {
				ans=i;
				ansc=count;
			}
	}
	System.out.println(a==1?1: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