On Time For The Exam SoftUni

import java.util.Scanner;

public class OnTimeForTheExam {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int examHour = Integer.parseInt(scanner.nextLine());
        int examMinutes = Integer.parseInt(scanner.nextLine());
        int inHour = Integer.parseInt(scanner.nextLine());
        int inMinutes = Integer.parseInt(scanner.nextLine());

        int examTime = examHour * 60 + examMinutes;
        int inTime = inHour * 60 + inMinutes;
        int diffHour = 0;
        int diffMinutes = 0;

        if (inTime >= (examTime - 30) && inTime <= examTime) {
            if (examTime - inTime > 0) {
                diffMinutes = examTime - inTime;
                System.out.println("On time");
                System.out.printf("%d minutes before the start", diffMinutes);
            }
            if (examTime - inTime == 0) {
                diffMinutes = inTime - examTime;
                System.out.println("On time");
            }
        }

        else if (inTime < (examTime - 30)) {
            if ((examTime - inTime) >= 60) {
                diffHour = (examTime - inTime) / 60;
                diffMinutes = (examTime - inTime) % 60;
                if (diffMinutes <10) {
                    System.out.println("Early");
                System.out.printf("%d:0%d hours before the start", diffHour, diffMinutes);
                }
                else if (diffMinutes >=10) {
                    System.out.println("Early");
                    System.out.printf("%d:%d hours before the start", diffHour, diffMinutes);
                }
            } else if ((examTime - inTime) < 60) {
                diffMinutes = examTime - inTime;
                System.out.println("Early");
                System.out.printf("%d minutes before the start", diffMinutes);
            }
        }

        else if (inTime > examTime) {
            if ((inTime - examTime) >= 60) {
                diffHour = (inTime - examTime) / 60;
                diffMinutes = (inTime - examTime) % 60;
                if (diffMinutes <10) {
                    System.out.println("Late");
                    System.out.printf("%d:0%d hours after the start", diffHour, diffMinutes);
                }
                else if (diffMinutes >=10) {
                    System.out.println("Late");
                    System.out.printf("%d:%d hours after the start", diffHour, diffMinutes);
                }
            }
            else if ((inTime - examTime) < 60){
                diffMinutes = inTime - examTime;
                System.out.println("Late");
                System.out.printf("%d minutes after the start", diffMinutes);
            }
        }

    }
}