OnTimeForTheExam

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace OnTimeForTheExam
{
    class Program
    {
        static void Main(string[] args)
        {
            int hoursExam = int.Parse(Console.ReadLine());
            int minutesExam = int.Parse(Console.ReadLine());
            int hoursComing = int.Parse(Console.ReadLine());
            int minutesComing = int.Parse(Console.ReadLine());

            int minutesFromHoursExam = hoursExam * 60;
            int timeExamInMinutes = minutesFromHoursExam + minutesExam;
            int minutesFromHoursGoming = hoursComing * 60;
            int timeGomingInMinutes = minutesFromHoursGoming + minutesComing;

            if (timeGomingInMinutes > timeExamInMinutes)
            {
                double timeLate = timeGomingInMinutes - timeExamInMinutes;
                if (timeLate < 60)
                {
                    Console.WriteLine("Late");
                    Console.WriteLine("{0} minutes after the start", timeLate);
                }
                else if (timeLate >= 60)
                {
                    double hoursLate = Math.Floor (timeLate / 60);
                    double minutesLate = timeLate % 60;
                    Console.WriteLine("Late");
                    Console.WriteLine("{0}:{1:00} hours after the start", hoursLate, minutesLate);
                }
            }
            else if ((timeGomingInMinutes + 30 >= timeExamInMinutes) && (timeGomingInMinutes <= (timeExamInMinutes + 30)))
            {
                double timeOnTime = timeExamInMinutes - timeGomingInMinutes;
                Console.WriteLine("On time");
                Console.WriteLine("{0} minutes before the start", timeOnTime);
            }
            else if (timeGomingInMinutes < timeExamInMinutes)
            {
                var timeEarly = timeExamInMinutes - timeGomingInMinutes;
                if (timeEarly < 60)
                {
                    Console.WriteLine("Early");
                    Console.WriteLine("{0} minutes before the start", timeEarly);
                }
                else if (timeEarly >= 60)
                {
                    var hoursEarly = timeEarly / 60;
                    var minutesEarly = timeEarly % 60;
                    Console.WriteLine("Early");
                    Console.WriteLine("{0} {1:00} hours before the start", hoursEarly, minutesEarly);
                }
            }

        }
    }
}