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

namespace Exam_Preparation
{
    class Program
    {
        static void Main(string[] args)
        {
            int badGradeLimit = int.Parse(Console.ReadLine());
            int badGradeCount = 0;
            double problemCount = 0;
            double gradeSum = 0;
            string problemName = string.Empty;
            string lastProblemName = string.Empty;



            while (badGradeCount < badGradeLimit)
            {
                problemName = Console.ReadLine();
                if (problemName == "Enough")
                {
                    break;
                }
                double grade = int.Parse(Console.ReadLine());
                gradeSum += grade;

                if (grade > 4)
                {
                    lastProblemName = problemName;
                }
                else
                {
                    badGradeCount++;
                }
                problemCount++;
            }

            if (badGradeCount < badGradeLimit && lastProblemName != "Enough")
            {
                Console.WriteLine($"Average score: {(gradeSum) / problemCount:f2}");
                Console.WriteLine($"Number of problems: {problemCount}");
                Console.WriteLine($"Last problem: {lastProblemName}");
            }
            if (badGradeCount == badGradeLimit)
            {
                Console.WriteLine($"You need a break, {badGradeLimit} poor grades.");
            }
        }
    }
}