09. On Time for the Exam

using System;

namespace On_Time_for_the_Exam
{
    class Program
    {
        static void Main(string[] args)
        {

            int hhStart = int.Parse(Console.ReadLine());
            int mmStart = int.Parse(Console.ReadLine());
            int hhCome = int.Parse(Console.ReadLine());
            int mmCome = int.Parse(Console.ReadLine());

            int allStart = hhStart * 60 + mmStart;
            int allCome = hhCome * 60 + mmCome;

            string LateEarly = string.Empty;

            if (allCome <= allStart)
            {
                if (allStart - 30 > allCome)
                {
                    LateEarly = "Early";

                }
                else
                {
                    LateEarly = "On time";
                }
                                           }
            else
            {
                LateEarly = "Late";
            }
            if (allStart > allCome)
            {

            }
            Console.WriteLine($"{LateEarly}");

            double mm = Math.Abs((allStart - allCome) % 60);
            double hh = Math.Abs((allStart - allCome) / 60);

            if (allCome < allStart)
            {
                if (hh!=0 && mm >= 0 && mm < 10)
                {
                    Console.WriteLine($"{hh:f0}:0{mm} hours before the start");
                }
                else if(hh != 0)
                {
                    Console.WriteLine($"{hh:f0}:{mm} hours before the start");
                }
                else if (hh==0)
                {
                    Console.WriteLine($"{mm} minutes before the start");
                }
            }
            else if (allCome > allStart)
            {
                if (hh != 0 && mm >= 0 && mm < 10)
                {
                    Console.WriteLine($"{hh:f0}:0{mm} hours after the start");
                }
                else if (hh != 0)
                {
                    Console.WriteLine($"{hh:f0}:{mm} hours after the start");
                }
                else if (hh == 0)
                {
                    Console.WriteLine($"{mm} minutes after the start");
                }
            }


        }
    }
}