2

import java.util.Scanner;

public class ExamPreparation {
    public static void main(String[] args) {
            Scanner scanner = new Scanner(System.in);
            int numberBadGrades = Integer.parseInt(scanner.nextLine());
            String lastProblem = "";
            int numberOfProblems = 0;
            double gradeSum=0.0;
            int badGrades = 0;
            String input = "";
            int grade=0;
            Boolean enough = false;

             while (badGrades<numberBadGrades ) {
                 input = scanner.nextLine();
                 if (input.equals("Enough")) {
                     enough = true;
                     break;
                 } else {
                     lastProblem = input;
                     input = scanner.nextLine();
                     grade = Integer.parseInt(input);
                     if (grade<=4)
                         badGrades++;

                     gradeSum = gradeSum + grade;
                     numberOfProblems++;
                 }
             }
             if (enough) {
                 System.out.printf("Average score: %.2f%n" +
                         "Number of problems: %d%n" +
                         "Last problem: %s",(gradeSum/numberOfProblems),numberOfProblems,lastProblem );
             }else
                 System.out.printf("You need a break, %d poor grades.",badGrades);

             }

    }