using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var hours = new int[] {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23};

        var testResults = GetTimeBuckets(new TimeSpan(8, 0, 0), new TimeSpan(20, 0, 0), hours);

        foreach(var result in testResults)

        {

            Console.WriteLine(String.Format("Hour: {0}  InBucket: {1}",result.Item1.ToString(), result.Item2.ToString()));

        }

    }

    public static IEnumerable<Tuple<TimeSpan, bool>> GetTimeBuckets(TimeSpan startHour, TimeSpan endHour, IEnumerable<int> hours)

    {

        var result = new List<Tuple<TimeSpan, bool>>();

        foreach(var hour in hours)

        {

            var hourSpan = new TimeSpan(hour, 0, 0);

            if(startHour < endHour && (hourSpan >= startHour && hourSpan < endHour)

               || startHour > endHour && (hourSpan < endHour || hourSpan >= startHour)

               || startHour == endHour)

            {

                result.Add(new Tuple<TimeSpan, bool>(hourSpan, true));

            }

            else

            {

                result.Add(new Tuple<TimeSpan, bool>(hourSpan, false));

            }

        }

        return result;

    }

}