import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int N = sc.nextInt();

        if (N == 1) {
            System.out.println("1");
            sc.close();
            return;
        }

        int max2 = 1;

        while (max2 < N) {
            max2 *= 2;
        }
        max2 /= 2;

        int count = 1;
        while (max2 <= N) {
            max2 *= count;
            count++;
        }
        max2 /= --count;

        System.out.println(max2);
        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