using System;

namespace grades_2nd_try
{
    class Program
    {
        static void Main(string[] args)
        {
            int badGrades = int.Parse(Console.ReadLine());
            int counterbadGrades = 0;
            int counterGrades = 0;
            string lastSubject = string.Empty;
            int grade = 0;
            double sumGrades = 0;
            int totalGrades = 0;

            string input = String.Empty;

            while (input != "Enough" && counterbadGrades < badGrades)

            {
                // lastSubject = input;
                input = Console.ReadLine();


                if (input == "Enough")
                    break;

                lastSubject = input;

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

                if (grade <= 4)
                {
                    counterbadGrades++;
                    sumGrades += grade;
                }
                else
                {
                    sumGrades += grade;
                    counterGrades++;
                }


            }
            totalGrades = counterGrades + counterbadGrades;
            double average = sumGrades / totalGrades;

            if (input == "Enough")

            {
                Console.WriteLine($"Average score: {average:F2}");
                Console.WriteLine($"Number of problems: {totalGrades}");
                Console.WriteLine($"Last problem: {lastSubject}");
            }

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

        }
    }
}