Exam-06.August.2019-02.TreasureHunt

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

namespace _02.TreasureHunt
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> treasureChest = Console.ReadLine().Split('|').ToList();

            string[] command = Console.ReadLine().Split();
            string word = command[0];

            while (word != "Yohoho!")
            {
                if (word == "Loot")
                {

                    for (int i = 1; i < command.Length; i++)
                    {
                        string current = command[i];

                        if (!(treasureChest.Contains(current)))
                        {
                            treasureChest.Insert(0, current);
                        }
                    }
                }


                if (word == "Drop")
                {
                    int index = int.Parse(command[1]);

                    if (index >= 0 && index < treasureChest.Count)
                    {
                        string droppedElement = treasureChest[index];
                        treasureChest.RemoveAt(index);
                        treasureChest.Add(droppedElement);
                    }
                    else
                    {
                        command = Console.ReadLine().Split();
                        word = command[0];
                        continue;
                    }
                }


                if (word == "Steal")
                {
                    int count = int.Parse(command[1]);
                    List<string> stollenElements = new List<string>();


                    if (count > treasureChest.Count)
                    {
                        count = treasureChest.Count;
                    }

                    for (int i = count; i > 0; i--)
                    {
                        string lastElement = treasureChest[treasureChest.Count - 1];
                        treasureChest.Remove(lastElement);
                        stollenElements.Add(lastElement);
                    }
                    stollenElements.Reverse();
                    Console.WriteLine(string.Join(", ", stollenElements));



                }

                command = Console.ReadLine().Split();
                word = command[0];

            }

            double sum = 0;
            double average = 0;

            for (int i = 0; i < treasureChest.Count; i++)
            {
                sum += treasureChest[i].Length;
            }
            average = sum / treasureChest.Count;

            if (treasureChest.Count > 0)
            {
                Console.WriteLine($"Average treasure gain: {average:f2} pirate credits.");
            }
            else
            {
                Console.WriteLine("Failed treasure hunt.");
            }
        }
    }
}