import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int maxcount = 0;
		int ans = 1;
		for(int i = 1; i <= N; i++) {
			int a = i;
			int count = 0;
			while(a%2 == 0 && i >= 1) {
				a /= 2;
				count++;
			}
			if(count > maxcount) {
				maxcount = count;
				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