using System;

​

public class Program

{

    public static void Main()

    {

        //karol  sumar numeros de acuerdo a cuanrtos te de el usuario 

        int number;

        int result = 0;

        string name;

        Console.WriteLine("hello I Will hel you to calculate your average. Whats your name ?");

        name = Console.ReadLine();

        Console.WriteLine("nice to meet you "+ name );

            Console.WriteLine("now, "+ name +" how many classes do yo have");

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

        for (int i = 1; i <= number; i++)

        {

            if (i == 1)

            {

                Console.WriteLine("Write the result of the first class");

                result += int.Parse(Console.ReadLine());

            }

            else if (i == number)

            {

                Console.WriteLine("Write the result  of the class");

                result += int.Parse(Console.ReadLine());

            }

        else

        {

            Console.WriteLine("Write the result of the next number");

            result += int.Parse(Console.ReadLine());

        }

    }

​

    Console.WriteLine( "the total is " + result ) ; 

    }

}

​