import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int ans = 1;
		int count =0;
		for(int i = 1; i <= n; i++) {
			int divi = i;
			int roop = 0;
			while(divi % 2 == 0) {
				divi = divi/2;
				roop++;
			}
			if(count < roop) {
				count = roop;
				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