ExamPreparation

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ExamPreparation

{
    class Program
    {
        static void Main(string[] args)
        {

            int possibleBadGrades = int.Parse(Console.ReadLine());
            int badGradesCount = 0;
            int total = 0;
            double sum = 0;

            string lastProblem =string.Empty;
            while (badGradesCount < possibleBadGrades)
            {
                string command = Console.ReadLine();
                int grade = int.Parse(Console.ReadLine());
                if (command=="Enough")
                {
                    break;
                }
                int currentGrade = int.Parse(Console.ReadLine());
                lastProblem = command;
                total++;
                sum += currentGrade;
                if (currentGrade<=4)
                {
                    badGradesCount++;
                }
            }
            if (badGradesCount==possibleBadGrades)
            {
                Console.WriteLine($"You need a break, {badGradesCount} poor grades.");
            }
            else
            {
                double average = sum / total;

                Console.WriteLine($"Average score: {average:f2}");
                Console.WriteLine($"Number of problem: {total}");
                Console.WriteLine($"Last problem: {lastProblem}");

            }

        }
    }
}