using System;

public class Program

{

    public static void Main()

    {

        //rUBÉN f. aLMONTE 

        int num, a, total, subto;

        string name;

        subto = 0;

        Console.WriteLine("Hi! I'll help you calculate your average. What's your name?");

        name = (Console.ReadLine());

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

        Console.WriteLine("Now, " + name + ", how many classes are you studying?");

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

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

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

        subto += a;

        if (a <= 69)

        {

            Console.WriteLine("Sorry, you failed.");

        }

        if(a >= 70 && a < 101)

        {

            Console.WriteLine("Good, you passed!");

        }

        for(int i= 2; i <= num -1; i++)

            {

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

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

            subto += a;

        if (a <= 69)

        {

            Console.WriteLine("Sorry, you failed.");

        }

        if(a >= 70 && a < 101)

        {

            Console.WriteLine("Good, you passed!");

        }

        }

        if (num != 1)

        {

            Console.WriteLine("Please write the result of the last class.");

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

            subto += a;

        if (a <= 69)

        {

            Console.WriteLine("Sorry, you failed.");

        }

        if(a >= 70 && a < 101)

        {

            Console.WriteLine("Good, you passed!");

        }

        }

        total = subto / num;

        Console.WriteLine("Your average is: " + total);

    }

}