import java.util.Scanner;

public class No500 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextLong();
		long result = 1;
		int cnt = 0;
		for(long i = 1;i <= N;i++) {
			result = result * i;
			String str = String.valueOf(result);
			if(str.length() > 12) {
				cnt++;
				str = str.substring(str.length() - 12,str.length());
			}
			result = Long.parseLong(str);
		}
		if(cnt == 0) {
			System.out.println(result);
		}else {
		System.out.println(String.format("%012d", result));
		}
	}
}