Здравейте, Jugde ми дава 90/100 и не мога да си открия грешката. Благодаря предварително!

using System;

namespace Exam_Preparation
{
    class Program
    {
        static void Main(string[] args)
        {
            int badGrades = int.Parse(Console.ReadLine());
            string nameOfExercise = Console.ReadLine();
            int grade = int.Parse(Console.ReadLine());

            int counter = 0;
            double averageGrade = 0.0;
            int enough = 1;
            
            
           

            while (nameOfExercise != "Enough")
            {
                string lastProblem = nameOfExercise;
                nameOfExercise = Console.ReadLine();
               
                counter++;
                averageGrade = averageGrade + grade;
                double total = averageGrade / counter;

                if (grade <= 4)
                {
                    enough++;
                }

                if (enough == badGrades)
                {
                    Console.WriteLine($"You need a break, {badGrades} poor grades.");
                    break;
                }

                if (nameOfExercise == "Enough")
                {
                    Console.WriteLine($"Average score: {total:f2}");
                    Console.WriteLine($"Number of problems: {counter}");
                    Console.WriteLine($"Last problem: {lastProblem}");
                    break;
                }
                              
                grade = int.Parse(Console.ReadLine());
            }           

        }
    }
}