import java.util.Scanner;
class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long num = sc.nextLong(),data = 1;
		if(num >= 50) {
			System.out.println("000000000000");
			return;
		}
		long mod = (long)100000 * 10000000;
		for(int i = 1;i <= num ; i++) data = (((long)data % mod) * i) % (long)mod;
		if(num > 14 && String.valueOf(data).length() < 12) {
			for(int i =  String.valueOf(data).length() ; i < 12 ; i++) 
				System.out.print("0");
		}
		System.out.println(data);
	}
}