import java.util.Scanner;
public class Main {
	public static int N,K,a=-1;
	public static String ans="";
	//public static int a[][]=new int[5][5];

	public static void main(String[]args) {
		Scanner sc=new Scanner(System.in);
		N=sc.nextInt();
		for(int i=1;i<=N;i++) {
			int get=0;int tri=i;
			for(;;) {
				if(tri%2==0) {
					tri/=2;
					get++;
				}else {
					break;
				}
			}
			if(a<get) {
				a=get;
				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