ThePianist-ExamPreparation

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


namespace TheImitationGame
{
    class Program
    {
        static void Main(string[] args)
        {
            int initialNumber = int.Parse(Console.ReadLine());
            var dictPieceComposerKey = new Dictionary<string, List<string>>();
            for (int i = 0; i < initialNumber; i++)
            {
                string[] input = Console.ReadLine().Split('|').ToArray();
                string piece = input[0];
                string composer = input[1];
                string key = input[2];
                if (dictPieceComposerKey.ContainsKey(piece) == false)
                {
                    dictPieceComposerKey[piece] = new List<string>();
                    dictPieceComposerKey[piece].Add(composer);
                    dictPieceComposerKey[piece].Add(key);
                }
            }

            string command = string.Empty;
            while ((command = Console.ReadLine()) != "Stop")
            {
                string[] commandArray = command.Split('|').ToArray();
                if (commandArray[0] == "Add")
                {
                    string piece = commandArray[1];
                    string composer = commandArray[2];
                    string key = commandArray[3];
                    if (dictPieceComposerKey.ContainsKey(piece) == false)
                    {
                        dictPieceComposerKey[piece] = new List<string>();
                        dictPieceComposerKey[piece].Add(composer);
                        dictPieceComposerKey[piece].Add(key);
                        Console.WriteLine($"{ piece} by { composer} in { key} added to the collection!");
                    }

                    else
                    {
                        Console.WriteLine($"{piece} is already in the collection!");
                    }
                }

                else if (commandArray[0] == "Remove")
                {
                    string piece = commandArray[1];
                    if (dictPieceComposerKey.ContainsKey(piece) == true)
                    {
                        dictPieceComposerKey.Remove(piece);
                        Console.WriteLine($"Successfully removed {piece}!");
                    }

                    else
                    {
                        Console.WriteLine($"Invalid operation! {piece} does not exist in the collection.");
                    }
                }

                else if (commandArray[0] == "ChangeKey")
                {
                    string piece = commandArray[1];
                    string newKey = commandArray[2];
                    if (dictPieceComposerKey.ContainsKey(piece) == true)
                    {
                        dictPieceComposerKey[piece][1] = newKey;
                        Console.WriteLine($"Changed the key of {piece} to {newKey}!");
                    }

                    else
                    {
                        Console.WriteLine($"Invalid operation! { piece} does not exist in the collection.");
                    }
                }
            }

            foreach (var item in dictPieceComposerKey.OrderBy(x => x.Key).ThenBy(x => x.Value[0]))
            {
                string piece = item.Key;
                string composer = item.Value[0];
                string key = item.Value[1];
                Console.WriteLine($"{piece} -> Composer: {composer}, Key: {key}");
            }
        }
    }
}