TreasureHunt

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

namespace TreasureHunt
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> treasureChest = Console.ReadLine()
                .Split("|")
                .ToList();

            string command;
            while ((command = Console.ReadLine()) != "Yohoho!")
            {
                string[] commandArgs = command.Split(' ').ToArray();
                string commandType = commandArgs[0];

                if (commandType == "Loot")
                {
                    for (int i = 1; i < commandArgs.Length; i++)
                    {
                        string itemToInsert = commandArgs[i];
                        if (treasureChest.Contains(itemToInsert))
                        {
                            continue;
                        }
                        else
                        {
                            treasureChest.Insert(0, itemToInsert);
                        }
                    }
                }
                if (commandType == "Drop")
                {
                    int index = int.Parse(commandArgs[1]);

                    if (index < 0 || index >= treasureChest.Count)
                    {
                        continue;
                    }
                    else
                    {
                        string temp = treasureChest[index];
                        treasureChest.RemoveAt(index);
                        treasureChest.Add(temp);
                    }
                }
                if (commandType == "Steal")
                {
                    int count = int.Parse(commandArgs[1]);

                    if (count > treasureChest.Count)
                    {
                        count = treasureChest.Count;
                        List<string> stolenLoot = new List<string>();

                        for (int i = 0; i < count; i++)
                        {
                            stolenLoot.Add(treasureChest[treasureChest.Count - 1]);
                            treasureChest.Remove(treasureChest[treasureChest.Count - 1]);
                        }
                        stolenLoot.Reverse();
                        Console.WriteLine(string.Join(", ", stolenLoot));
                    }
                    else
                    {
                        List<string> stolenLoot = new List<string>();

                        for (int i = 0; i < count; i++)
                        {
                            stolenLoot.Add(treasureChest[treasureChest.Count - 1]);
                            treasureChest.Remove(treasureChest[treasureChest.Count - 1]);
                        }
                        stolenLoot.Reverse();
                        Console.WriteLine(string.Join(", ", stolenLoot));
                    }
                }
            }
            if (treasureChest.Count == 0)
            {
                Console.WriteLine($"Failed treasure hunt.");
            }
            else
            {
                double sum = 0.0;
                for (int i = 0; i < treasureChest.Count; i++)
                {
                    sum += treasureChest[i].Count();
                }
                double averageGain = sum / treasureChest.Count();
                Console.WriteLine($"Average treasure gain: {averageGain:F2} pirate credits.");
            }
        }
    }
}