ExamPreparation_WhileLoop

import java.util.Scanner;

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

        int numPoorMarks = Integer.parseInt(scanner.nextLine());
        String question = scanner.nextLine();

        int countPoorMark = 0;
        int sumMarks = 0;
        int sumQuestions = 0;
        String lastQuestion = "";

        while (!question.equals("Enough")) {
            int mark = Integer.parseInt(scanner.nextLine());
            sumMarks = sumMarks + mark;
            sumQuestions++;

            if (mark <= 4) {
                countPoorMark++;
            }
            if (countPoorMark == numPoorMarks) {
                System.out.printf("You need a break, %d poor grades.", countPoorMark);
                break;
            }
            lastQuestion = question;
            question = scanner.nextLine();
        }

        if (question.equals("Enough")) {
            double averageMark = sumMarks * 1.0 / sumQuestions;
            System.out.printf("Average score: %.2f%n", averageMark);
            System.out.printf("Number of problems: %d%n", sumQuestions);
            System.out.printf("Last problem: %s", lastQuestion);
        }

    }
}