using System;

public class Program

{

    public static void Main()

    {

        string a = "0";

        string b = "0";

        string op = "1";

        Console.WriteLine("=================");

        Console.WriteLine("TORRY CALCULADORA");

        Console.WriteLine("=================");

        Console.WriteLine("");

        Console.WriteLine("Insert number A:");

        a = Console.ReadLine();

        Console.WriteLine("");

        Console.WriteLine("Insert number B:");

        b = Console.ReadLine();

        Console.WriteLine("");

        Console.WriteLine("Insert 1 to plus");

        Console.WriteLine("Insert 2 to minus");

        Console.WriteLine("Insert 3 to multiply");

        Console.WriteLine("Insert 4 to divide");

        op = Console.ReadLine();

        Console.WriteLine("====================");

        Console.WriteLine("");

        if(Int32.Parse(op) == 1){

            Console.WriteLine(Int32.Parse(a)+Int32.Parse(b));

        }

        if(Int32.Parse(op) == 2){

            Console.WriteLine(Int32.Parse(a)-Int32.Parse(b));

        }

        if(Int32.Parse(op) == 3){

            Console.WriteLine(Int32.Parse(a)*Int32.Parse(b));

        }

        if(Int32.Parse(op) == 4){

            Console.WriteLine(Int32.Parse(a)/Int32.Parse(b));

        }

    }

}