02. Exam Preparation

using System;

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

            string NameTask = Console.ReadLine();

            int Mistake = 0;
            double TotalGrade = 0;
            int CountTask = 0;
            string LastMistake = string.Empty;


            while(NameTask!="Enough"&& Mistake<BadGrade)
            {
                double Grade = double.Parse(Console.ReadLine());
                if (Grade > 4)
                {
                    TotalGrade += Grade;
                    LastMistake = NameTask;
                    NameTask = Console.ReadLine();
                }
                else if (Grade <= 4)
                {
                    Mistake++;
                    TotalGrade += Grade;
                    LastMistake = NameTask;
                    NameTask = Console.ReadLine();
                }
                else if (Mistake > BadGrade)
                {
                    break;
                }
                CountTask++;
            }
            double AverageGrade = TotalGrade / CountTask;

            if (NameTask == "Enough")
            {
                Console.WriteLine($"Average score: {AverageGrade:f2}");
                Console.WriteLine($"Number of problems: {CountTask}");
                Console.WriteLine($"Last problem: {LastMistake}");
            }
            else
            {
                Console.WriteLine($"You need a break, {Mistake} poor grades.");
            }

        }
    }
}