Factorial

import java.util.Scanner;
class Factorial {
    public static int Factorial(int num) {

        int fact=1;
        for(int i=1; i<=num; i++){
            fact = fact*i;
        }
        return fact;

    }

    public static void main (String[] args) {
        // keep this function call here
        Scanner s = new Scanner(System.in);
        System.out.print(Factorial(s.nextInt()));
    }