TimePlusFifteenMinutes - Chapter 3.0

//Task 014, Chapter 3.0
using System;

public class TimePlusFifteenMinutes
{
    static void Main()
    {
        int hours = int.Parse(Console.ReadLine());
        int minutes = int.Parse(Console.ReadLine());

        if(minutes + 15 >= 60)
        {
            hours++;
            minutes = minutes + 15 - 60;
        }
        else
        {
            minutes += 15;
        }

        if(hours >= 24)
        {
            hours -= 24;
        }

        Console.WriteLine($"{hours:D1}:{minutes:D2}");
    }
}