ExamPreparation ( While-Loop - Exercise )

import java.util.Scanner;

public class ExamPreparation {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int badGrades = Integer.parseInt(scanner.nextLine());
        String problemName = "";

        int numberOfProblems = 0;
        int poorGrades = 0;
        int allGrades = 0;
        String lastTask = "";


        while (poorGrades < badGrades) {
            lastTask = problemName;
            problemName = scanner.nextLine();
            if (problemName.equals("Enough")) {
                double averageScore = allGrades * 1.0 / numberOfProblems;
                System.out.printf("Average score: %.2f%n", averageScore);
                System.out.printf("Number of problems: %d%n", numberOfProblems);
                System.out.printf("Last problem: %s", lastTask);
                break;
            }
            int grade = Integer.parseInt(scanner.nextLine());
            numberOfProblems++;
            if (grade <= 4) {
                poorGrades++;
                allGrades += grade;
            } else {
                allGrades += grade;
            }

            if (poorGrades >= badGrades) {
                System.out.printf("You need a break, %d poor grades.", poorGrades);
            }
        }


    }
}