using System;

public class Program

{

    public static void Main()

    {

        int Variable3;

        int Variable1 = Try.Parse(Console.ReadLine(),out Variable1));

        int Variable2 = Try.Parse(Console.ReadLine(),out Variable2));

        if ( Variable2 >= Variable1)

        {

            Console.WriteLine("Variable 1 zu klein");

        }

        else();

        {

            if( Variable1 >= 30)

            {

                Variable1 + Variable2 = Variable3;

            }

            else();

            {

                if(Variable2 >= 30)

                {

                    Variable1 - Variable2 = Variable3;

                }

                else();

                {

                    Console.WriteLine("Ihre Eingabe ist Ungültig.");

            }

​

    }

}

        Console.WriteLine(Variable3);

    }

}