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 max = 0;
        int highest = 1;

        for (int i = 1; i < n + 1; i++) {
            int x = i;
            int ans = 0;
            while (x % 2 == 0) {
                x /= 2;
                ans += 1;
                if (x == 0) {
                    break;
                }
            }
            if (max < ans) {
                max = ans;
                highest = i;
            }
        }
        System.out.print(highest);
    }
}
/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