import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int N = scan.nextInt();
		scan.close();
		long x = 1;
		for(int i = 1; i <= N; i++) {
			x = x * i;
			String n = Long.toString(x);
			if(n.length() > 15) {
				x = Long.parseLong(n.substring(n.length() - 15, n.length()));
			}
		}
		String ans = Long.toString(x);
		if(ans.length() > 12) {
			ans = ans.substring(ans.length() - 12, ans.length());
		}
		System.out.println(ans);
	}
}