import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner((System.in));
		int N = sc.nextInt();
		int a = 0, b = 0, c = 1;

		for (int i = 1; i <= N; i++) {
			int k = i;
			while (k % 2 == 0) {
				k = k / 2;
				a++;
			}
			if (b < a) {
				b = a;
				c = i;
			}
			a = 0;
		}
		System.out.print(c);
		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