백준_if문: 45분빠른 알람

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

namespace ConsoleApp6
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] s = Console.ReadLine().Split(' ');
            int h = int.Parse(s[0]);
            int m  = int.Parse(s[1]);
            if (h < 0 || h > 24 || m < 0 || m > 59) return;

            if (m < 45)
            {
                h--;
                m += 15;

                if(h < 0)
                {
                    h = 23;
                }
            }
            else
            {
                m -= 45;
            }

            Console.WriteLine("{0} {1}", h, m);                                                          
        }
    }
}