On time for exam

package com.company;

import java.util.Scanner;

/**
 * Created by user on 20/05/17.
 */
public class P03OnTimeForExam {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        int examHour = Integer.parseInt(input.nextLine());
        int examMinutes = Integer.parseInt(input.nextLine());
        int myHour = Integer.parseInt(input.nextLine());
        int myMinutes = Integer.parseInt(input.nextLine());

        int difference = (examHour * 60 + examMinutes) - (myHour * 60 +myMinutes);
        int hour = difference/60;
        int minutes = difference%60;



        if (difference > 30) {
            System.out.println("Early");

            if (difference>=31 && difference<=59) {
                System.out.printf("%02d minutes before the start", difference);

            }else {
                System.out.printf("%d:%02d hours before the start", hour, minutes);
            }



        }else if ((difference <= 30 && difference >0) || difference ==0){
            System.out.println("On time");

            if (difference<=30 && difference >0) {
                System.out.printf("%d minutes before the start", difference);
            }else {
                //empty
            }

        }else if (difference<0) {
            System.out.println("Late");

            if (difference<=-1 && difference >=-9 ) {
                System.out.printf("%02d minutes after the start", Math.abs(difference));

            }else if (difference <-9&& difference >=-59) {
                System.out.printf("%d minutes after the start", Math.abs(difference));

            }else {
                System.out.printf("%d:%02d hours after the start", Math.abs(hour), Math.abs(minutes));
            }

        }



    }
}