import static java.lang.System.*;
import java.util.Scanner;

public class Main{
	public static void main(String[] args) {
		Scanner s = new Scanner(in);
		
		int n = s.nextInt();
		
		int cur = 1;
		int max = 0;
		
		for(int x=2;x<=n;x++) {
			int exp = 1;
			while(x%Math.pow(2,exp)==0 && Math.pow(2,exp)<x)
				exp++;
			
			if(exp>max) {
				max = exp;
				cur = x;
			}
		}
		
		out.println(cur);
	}
}
/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