using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Berechnung");

        double lo = berechnen(100);

        Console.WriteLine("Ergebnis: "+lo);

    }

    static double berechnen(int count)

    {

        double loesung = 1;

        for (double i = 1; i<= count; i++)

        { if (i%2==0)

            {

                loesung = loesung*i;

            } else 

        {

            loesung=loesung/i;

        }

    }

        return loesung;

    }

}