using System;

public class Program

{

    public static void Main()

    {

        int i, number, fact;

        Console.WriteLine("Enter the Number");

        number = int.Parse(Console.ReadLine());

        fact = number;

        for (i = number - 1; i >= 1; i--)

            {

                fact = fact * i;

            }

        Console.WriteLine("\nFactorial of Given Number is: "+fact);

        }

}