09. On Time for the Exam

import java.util.Scanner;

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

        int hourOfExam = Integer.parseInt(scan.nextLine());
        int minutesOfExam = Integer.parseInt(scan.nextLine());
        int hoursOfArriving = Integer.parseInt(scan.nextLine());
        int minutesOfArriving = Integer.parseInt(scan.nextLine());

        int totalMinutesOfExam = hourOfExam * 60 + minutesOfExam;
        int totalMinutesOfArriving = hoursOfArriving * 60 + minutesOfArriving;

        if (totalMinutesOfArriving > totalMinutesOfExam) {
            System.out.println("Late");
            int timeLate = totalMinutesOfArriving - totalMinutesOfExam;
            if (timeLate < 60) {
                System.out.printf("%d minutes after the start", timeLate);
            } else {
                int hours = timeLate / 60;
                int minutes = timeLate % 60;
                if (minutes < 10) {
                    System.out.printf("%d:0%d hours after the start", hours, minutes);
                } else {
                    System.out.printf("%d:%d hours after the start", hours, minutes);
                }
            }          // 80      60     == 20
        } else if (totalMinutesOfExam - totalMinutesOfArriving <= 30) {
            System.out.println("On time");
            int early = totalMinutesOfExam - totalMinutesOfArriving;
            if (early != 0) {
                System.out.printf("%d minutes before the start", early);
            }
        } else if (totalMinutesOfExam - totalMinutesOfArriving > 30) {
            System.out.println("Early");
            int earlyMinutes = totalMinutesOfExam - totalMinutesOfArriving;
            int hours = earlyMinutes / 60;
            int minutes = earlyMinutes % 60;

            if (earlyMinutes < 60) {
                System.out.printf("%d minutes before the start", minutes);
            } else {
                if (minutes < 10) {
                    System.out.printf("%d:0%d hours before the start", hours, minutes);
                } else {
                    System.out.printf("%d:%d hours before the start", hours, minutes);
                }
            }
        }
    }
}