08. Graduation

using System;

namespace Graduation
{
    class Program
    {
        static void Main(string[] args)
        {
            string name = Console.ReadLine();
            double sumGrades = 0;
            int counter = 1;
            int fail = 0;

            while (counter <= 12)
            {
                double grade = double.Parse(Console.ReadLine());

                if (grade >= 4)
                {
                    sumGrades += grade;
                    counter++;
                    if (counter == 13)
                    {
                        Console.WriteLine($"{name} graduated. Average grade: {sumGrades / 12:F2}");
                        break;
                    }
                }
                else
                {
                    fail++;
                    if (fail == 2)
                    {
                        Console.WriteLine($"{name} has been excluded at {counter} grade");
                        break;
                    }
                }
            }
        }
    }
}