using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("x = 20");

        Console.WriteLine("y = _");

        Console.WriteLine("");

            int y = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("");

        Console.WriteLine("Choose Operator");

        Console.WriteLine("1 = + | 2 = - | 3 = x | 4 = /");

        Console.WriteLine("");

            int operation = Convert.ToInt16(Console.ReadLine());

        Console.WriteLine("");

        Console.WriteLine("Give how many times you want to repeat the operation");

        Console.WriteLine("");

            int nTimes = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("");

            int x = 20;

        for(int i=0 ; i<=nTimes ; i++)

        {

            if( operation == 1)

            {

             x = x + y;

                Console.WriteLine("Result: {0}", x);

                Console.WriteLine("");

            }else if( operation == 2)

            {

             x = x - y;

                Console.WriteLine("Result: {0}", x);

                Console.WriteLine("");

            }else if( operation == 3)

            {

             x = x * y;

                Console.WriteLine("Result: {0}", x);

                Console.WriteLine("");  

            }else if( operation == 4)

            {

             x = x / y;

                Console.WriteLine("Result: {0}", x);

                Console.WriteLine("");  

            }else

            {

                x++;

                Console.WriteLine("Not valid operation");   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.Write(x);   

                Console.WriteLine(x);   

            }

        }

    }

}