using System;

public class Program

{

    public static void Main()

    {

        //Damaris Castrellón

        int a,n,t;

        string name;

        t =0;

        Console.WriteLine("Welcome. What's your name?");

        name = Console.ReadLine();

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

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

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

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

        {

            if(i == n)

            {

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

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

                if(a<= 100 && a>= 70)

                {

                    Console.WriteLine("GOOD, YOU PASSED");

                }

                else if(a<=69)

                    Console.WriteLine("SORRY, YOU FAILED");

                t +=a;

            }

        else if(i == 1)

        {

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

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

            if(a<= 100 && a>= 70)

                {

                    Console.WriteLine("GOOD, YOU PASSED");

                }

                else if(a<=69)

                    Console.WriteLine("SORRY, YOU FAILED");

                t +=a;

        }

        else

        {

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

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

            if(a<= 100 && a>= 70)

                {

                    Console.WriteLine("GOOD, YOU PASSED");

                }

                else if(a<=69)

                {

                    Console.WriteLine("SORRY, YOU FAILED");

                t +=a;

        }

        }

            Console.WriteLine("Your avarage is:" + " " + t/n);

        if(t/n<= 100 && t/n>= 70)

                {

                    Console.WriteLine("GOOD, YOU PASSED");

                }

                else if(t/n<=69)

                {

                    Console.WriteLine("SORRY, YOU FAILED");

                } 

        }

    }

}