using System;

public class Program

{

    public static void Main()

    {

        long Serial_Number = 621532191;

        long Activation_Code = (long) Math.Round((double) ((Serial_Number * Serial_Number) + ((69 + ((656 + 69) * 2) + 69) * (((double) Serial_Number) / (69 + ((69 * 39) - (Math.Sqrt((69 + 662 + 69) * 2))) + 69)))));

        string a = "Activation Code = ";

        string b = "Serial Number = ";

        Console.WriteLine(b + Serial_Number);

        Console.WriteLine(a + Activation_Code);

        Console.WriteLine("");

        Console.WriteLine("");

        Console.WriteLine("😈 استمتع");

    }

}