using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter number");

        int num1 = int.Parse(Console.ReadLine());

        Console.WriteLine("Enter another number");

        int num2 = int.Parse(Console.ReadLine());

        Console.WriteLine("Enter math sign");

        string math = Console.ReadLine();

        switch(math)

        {

            case "+":

                break;

        }

    }

}