using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

public class Program

{

    public static void Main()

    {

         string[] linesInFile = File.ReadAllLines("test.txt");

            int lengthOfLines = linesInFile.Length;

            Talk[] talks = new Talk[lengthOfLines];

​

            for (int i = 0; i < lengthOfLines; i++)

            {

                talks[i] = new Talk {Name = linesInFile[i]};

                string[] items = linesInFile[i].Trim().Split(' ');

​

                int itemlenght = items.Length - 1;

                string last = items[itemlenght].ToLower();

​

                talks[i].Duration = last == "lightning" ? 5 : int.Parse(last.Replace("min", ""));

            }

​

            //Two Tracks for AM and PM Sessions.

            List<Talk> firstTrackAm = new List<Talk>();

            List<Talk> firstTrackPm = new List<Talk>();

            List<Talk> secondTrackAm = new List<Talk>();

            List<Talk> secondTrackPm = new List<Talk>();

​

            // Sort the talks into decreasing order by duration.

            talks = talks.OrderByDescending(e => e.Duration).ToArray();

​

            //Sums of all tracks.

            int firstTrackAmSum = 0, firstTrackPmSum = 0, secondTrackAmSum = 0, secondTrackPmSum = 0;

            int next = 0;

​

            for (int i = 0; i < lengthOfLines; i++)

            {

                int duration = talks[i].Duration;

​

                if (next == 0 && (firstTrackAmSum + duration) <= 180)

                {

                    firstTrackAm.Add(talks[i]);

                    firstTrackAmSum += duration;

                    next++;

                }

                else if (next == 1 && (secondTrackAmSum + duration) <= 180)

                {

                    secondTrackAm.Add(talks[i]);

                    secondTrackAmSum += duration;

                    next++;

                }

                else if (next == 2 && (firstTrackPmSum + duration) <= 240)

                {

                    firstTrackPm.Add(talks[i]);

                    firstTrackPmSum += duration;

                    next++;

                }

                else if (next == 3 && (secondTrackPmSum + duration) <= 240)

                {

                    secondTrackPm.Add(talks[i]);

                    secondTrackPmSum += duration;

                    next = 0;

                }

                else

                {

                    i--;

                    next++;

                    if (next == 4) next = 0;

                }

            }

​

            //Time for the Networking Event.

            int mins = Math.Max(firstTrackPmSum, secondTrackPmSum);

​

            //It can't be before 4.00 pm

            if (mins < 180) mins = 180;

​

            DateTime netWorkingEvent = DateTime.Today.AddHours(13).AddMinutes(mins);

​

            //Print Results.

            Console.Clear();

            Console.WriteLine("Track 1:");

            DateTime dt = DateTime.Today.AddHours(9);

​

            foreach (Talk talkTrack in firstTrackAm)

            {

                Console.WriteLine("{0} {1}", dt.ToString("hh:mmtt"), talkTrack.Name);

                dt = dt.AddMinutes(talkTrack.Duration);

            }

​

            Console.WriteLine("12:00PM Lunch");

            dt = DateTime.Today.AddHours(13);

​

            foreach (Talk talkTime in firstTrackPm)

            {

                Console.WriteLine("{0} {1}", dt.ToString("hh:mmtt"), talkTime.Name);

                dt = dt.AddMinutes(talkTime.Duration);

            }

​

            Console.WriteLine("{0} Networking Event", netWorkingEvent.ToString("hh:mmtt"));

​

            Console.WriteLine("\nTrack 2:");

            dt = DateTime.Today.AddHours(9);

​

            foreach (Talk talkTime in secondTrackAm)

            {

                Console.WriteLine("{0} {1}", dt.ToString("hh:mmtt"), talkTime.Name);

                dt = dt.AddMinutes(talkTime.Duration);

            }

​

            Console.WriteLine("12:00PM Lunch");

            dt = DateTime.Today.AddHours(13);

​

            foreach (Talk talkTime in secondTrackPm)

            {

                Console.WriteLine("{0} {1}", dt.ToString("hh:mmtt"), talkTime.Name);

                dt = dt.AddMinutes(talkTime.Duration);

            }

​

            Console.WriteLine("{0} Networking Event", netWorkingEvent.ToString("hh:mmtt"));

            Console.ReadKey();

        }

    }

​

​

public class Talk

    {

​

        public string Name { get; set; }

        public int Duration { get; set; }

    }