Factorial

import java.util.Scanner;

public class Factorial {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = Integer.parseInt(scanner.nextLine());
        int result = 1;

       while (n > 0){
            result *= n;
            n--;
        }
        System.out.println(result);
    }
}