RoliTheCoder

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _04.RoliTheCoder
{
    public class RoliTheCoder
    {
        public static void Main()
        {
            string input = Console.ReadLine();

            Dictionary<string, Dictionary<string, List<string>>> dict =
                new Dictionary<string, Dictionary<string, List<string>>>();
            List<string> list = new List<string>();

            while (input != "Time for Code")
            {
                string[] inputLine = input
                    .Split(" @".ToCharArray(), StringSplitOptions.RemoveEmptyEntries)
                    .Select(a => a.Trim())
                    .ToArray();

                string ID = inputLine[0];
                string name = inputLine[1];

                if (name.Contains('#'))
                {
                    if (!dict.ContainsKey(ID))
                    {
                        dict.Add(ID, new Dictionary<string, List<string>>());

                        if (!dict[ID].ContainsKey(name))
                        {
                            dict[ID].Add(name, new List<string>());
                            for (int i = 2; i < inputLine.Length; i++)
                            {
                                dict[ID][name].Add(inputLine[i]);
                            }
                        }
                        else
                        {

                            for (int i = 2; i < inputLine.Length; i++)
                            {
                                if (!dict[ID][name].Contains(inputLine[i]))
                                {
                                    dict[ID][name].Add(inputLine[i]);
                                }
                            }
                        }
                    }
                    if (dict.ContainsKey(ID))
                    {
                        if (dict[ID].ContainsKey(name))
                        {
                            for (int i = 2; i < inputLine.Length; i++)
                            {
                                if (!dict[ID][name].Contains(inputLine[i]))
                                {
                                    dict[ID][name].Add(inputLine[i]);
                                }
                            }
                        }
                    }
                }
                input = Console.ReadLine();
            }
            foreach (KeyValuePair<string, Dictionary<string, List<string>>> kvp in dict
                                                                    .OrderByDescending(kvp => kvp.Value.Values.Count()))
            {
                foreach (var item in kvp.Value.OrderByDescending(x => x.Value.Count()).ThenBy(x => x.Key))
                {
                    Console.Write(item.Key.Trim('#'));
                    Console.WriteLine($" - {item.Value.Count()}");
                    foreach (var it in item.Value.OrderBy(x => x))
                    {
                        Console.WriteLine("@" + it);
                    }
                }
            }
        }
    }
}