using System;

using System.Globalization;

using System.Threading.Tasks;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json.Linq;     

​

public class Program

{

    public static void Main()

    {

        List<TimeSpan> times = new List<TimeSpan>() {

            new TimeSpan(23, 32, 0),

            new TimeSpan(1, 30, 0),

            new TimeSpan(1, 31, 0),

            new TimeSpan(15, 24, 0)

        };

        for(int i = 0; i < times.Count; i++){

            Console.WriteLine(GetParkuhr(times[i]));

        }

    }

    public static TimeSpan GetParkuhr(TimeSpan input)

    {

        int hours = input.Hours, 

            minutes = input.Minutes;

        if (input.Minutes > 30){

            hours = (input.Hours % 23) == 0 ? 0 : input.Hours + 1;

            minutes = 0;

        }

        else{

            minutes = ((input.Minutes % 30) == 0) ? 30 : 0;

        }

        return new TimeSpan(hours, minutes, 0);

    }

}