04._ForceBook

using System;
using System.Collections.Generic;
using System.Linq;

namespace _04._ForceBook
{
    class Program
    {
        static void Main(string[] args)
        {
            string line = Console.ReadLine();
            Dictionary<string, List<string>> listOfSides = new Dictionary<string, List<string>>();


            while (line != "Lumpawaroo")
            {
                List<string> users = new List<string>();
                if (line.Contains("|"))
                {
                    string[] input = line.Split(new [] { " | " }, StringSplitOptions.RemoveEmptyEntries);
                    string side = input[0];
                    string user = input[1];
                    if (!listOfSides.ContainsKey(side))
                    {
                        if (!users.Contains(user))
                        {
                            users.Add(user);
                            listOfSides.Add(side, users);
                        }
                    }
                    //Is it necessary to make some other cheques
                }
                else
                {
                    string[] input = line.Split(new [] { " -> " }, StringSplitOptions.RemoveEmptyEntries);
                    string side = input[1];
                    string user = input[0];

                    if (side == "Lighter" && listOfSides["Darker"].Contains(user))
                    {
                        listOfSides["Darker"].Remove(user);
                    }
                    else if (side == "Darker" && listOfSides["Lighter"].Contains(user))
                    {
                        listOfSides["Lighter"].Remove(user);
                    }

                    if (!listOfSides.ContainsKey(side))
                    {
                        if (!users.Contains(user))
                        {
                            users.Add(user);
                            listOfSides.Add(side, users);
                            Console.WriteLine($"{user} joins the {side} side!");
                        }
                        //Is it necessary to make some other cheques
                    }
                    else
                    {
                        listOfSides[side].Add(user);
                        Console.WriteLine($"{user} joins the {side} side!");
                    }

                }

                line = Console.ReadLine();
            }

            foreach (var pear in listOfSides.OrderBy(x=>x.Key))
            {
                if (pear.Value.Count > 0)
                {
                    Console.WriteLine($"Side: {pear.Key}, Members: {pear.Value.Count}");
                }

                foreach (var item in pear.Value.OrderBy(x=>x))
                {
                    Console.WriteLine($"! {string.Join(',', item)}");
                }
            }

        }
    }
}