import java.util.Scanner;

public class Main {

	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int maxNum = 1;
		int count = 0;
		for (int i = 0; i < N; i++) {
			int targetNum = i + 1;
			int tmpCount = 0;
			while (targetNum % 2 == 0) {
				targetNum = targetNum / 2;
				tmpCount++;
			}
			if (tmpCount > count) {
				count = tmpCount;
				maxNum = i + 1;
			}
		}
		System.out.println(maxNum);
		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