ExamSchedule

using System;
using System.Globalization;
class  ExamSchedule
{
    static void Main()
    {
        int hour = int.Parse(Console.ReadLine());
        int min = int.Parse(Console.ReadLine());
        string partOfDay = Console.ReadLine();

        int dHours = int.Parse(Console.ReadLine());
        int dMin = int.Parse(Console.ReadLine());

        string startTime = hour + ":" + min + " " + partOfDay;

        int checkHour = hour+dHours;
        int checkMin = min + dMin;

        while (checkMin>=60)
        {
            checkHour++;
            checkMin -= 60;
        }
        while (checkHour >= 12)
        {
            if (partOfDay == "PM")
            {
                partOfDay = "AM";

            }
            else if (partOfDay == "AM")
            {
                partOfDay = "PM";

            }
            checkHour -= 12;
        }


        TimeSpan dur = new TimeSpan(dHours, dMin, 00);
        //DateTime sTime = DateTime.Parse(startTime);

    DateTime result = new DateTime(1, 1, 1, checkHour, checkMin, 0);
        //DateTime result = sTime + dur;
        //string res = result.ToString("hh:mm:ss tt", CultureInfo.InvariantCulture);
        //partOfDay = result.ToString("tt", CultureInfo.InvariantCulture);

       //while (checkHour > 12)
       //{
       //    if (checkHour > 12 && partOfDay == "PM")
       //    {
       //        partOfDay = "AM";
       //        checkHour -= 12;
       //    }
       //    else if (checkHour > 12 && partOfDay == "AM")
       //    {
       //        partOfDay = "PM";
       //        checkHour -= 12;
       //    }
       //}
        Console.WriteLine("{0:hh:mm}:{1}",result,partOfDay);
    }
}