using System;

using System.Collections.Generic;

/* Add more C# standard library if it's required */

using System.Linq;

​

public class Program

{

    public class Booking

    {

        public int Id { get; set; }

        public DateTime BookingStart { get; set; }

        public DateTime BookingEnd { get; set; }

    }

​

    public class MeetingRoom

    {

        private List<Booking> bookings = new List<Booking>

        {

            new Booking { Id = 1, BookingStart = new DateTime(2014, 1, 15, 10, 0, 0), BookingEnd = new DateTime(2014, 1, 15, 11, 0, 0) },

            new Booking { Id = 2, BookingStart = new DateTime(2014, 1, 15, 13, 0, 0), BookingEnd = new DateTime(2014, 1, 15, 14, 30, 0) },

            new Booking { Id = 3, BookingStart = new DateTime(2014, 1, 15, 16, 0, 0), BookingEnd = new DateTime(2014, 1, 15, 17, 0, 0) }

        };

​

        public bool IsAvailable(DateTime start, DateTime end)

        {

            /* Question 1: Write code to check the meeting room is available or not */

            if (!bookings.Where(e => (e.BookingStart > start && e.BookingStart < end) || (e.BookingEnd > start && e.BookingEnd < end)).Any())

            {

                return true;

            }

            else

            {

                return false;

            }

        }

    }

    public class TestCase

    {

        public bool IsAvailable { get; set; }

        public DateTime Start { get; set; }

        public DateTime End { get; set; }

        public TestCase(bool isAvailable, DateTime start, DateTime end)

        {

            IsAvailable = isAvailable;

            Start = start;

            End = end;

        }

    }

    public static void Main()

    {

        var meetingRoom = new MeetingRoom();

        var testCases = new List<TestCase>

        {

            new TestCase(true, new DateTime(2014, 1, 15, 11, 0, 0), new DateTime(2014, 1, 15, 12, 0, 0)),

            /* Question 2: Write more test cases */

            new TestCase(true, new DateTime(2014, 1, 15, 10, 30, 0), new DateTime(2014, 1, 15, 12, 0, 0)),

            new TestCase(true, new DateTime(2014, 1, 15, 09, 0, 0), new DateTime(2014, 1, 15, 10, 30, 0)),

            new TestCase(true, new DateTime(2014, 1, 15, 09, 0, 0), new DateTime(2014, 1, 15, 20, 0, 0))

        };

        var incorrect = false;

        foreach (var testCase in testCases)

        {

            if (testCase.IsAvailable != meetingRoom.IsAvailable(testCase.Start, testCase.End))

            {

                incorrect = true;

                Console.WriteLine("Incorrect case {0}-{1}", testCase.Start, testCase.End);

            }

        }

        if (incorrect)

        {

            Console.WriteLine("Your function is incorrect");

        }

        else

        {

            Console.WriteLine("Your function is correct");

        }

    }

}