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 maxCount = 0;
		int ans = 0;
		
		for (int i = n; i >= 1; i--) {
			int num = i;
			int cnt = 0;
			
			while(true) {
				if (num % 2 == 0) {
					cnt++;
					num /= 2;
				} else {
					break;
				}
			}
			
			if (cnt >= maxCount) {
				ans = i;
				maxCount = cnt;
			}
		}
		
		System.out.println(ans);
		sc.close();
	}
}
/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