04. List Operations

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

namespace ListOperations
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> lists = Console.ReadLine().Split().Select(int.Parse).ToList();

            string[] command = Console.ReadLine().ToLower().Split().ToArray();

            while (command[0] != "end")
            {
                if (command[0] == "add")
                {
                    lists.Add(int.Parse(command[1]));
                }

                else if (command[0] == "insert")
                {
                    if (int.Parse(command[2]) < 0 || int.Parse(command[2]) > lists.Count - 1)
                    {
                        Console.WriteLine("Invalid index");
                    }
                    else
                    {
                        lists.Insert(int.Parse(command[2]), int.Parse(command[1]));
                    }
                }

                else if (command[0] == "remove")
                {
                    if (int.Parse(command[1]) < 0 || int.Parse(command[1]) > lists.Count - 1)
                    {
                        Console.WriteLine("Invalid index");
                    }
                    else
                    {
                        lists.RemoveAt(int.Parse(command[1]));
                    }
                }

                else if (command[0] == "shift" && command[1] == "left")
                {
                    for (int i = 0; i < int.Parse(command[2]); i++)
                    {
                        lists.Add(lists[0]);
                        lists.RemoveAt(0);
                    }
                }

                else if (command[0] == "shift" && command[1] == "right")
                {
                    for (int i = 0; i < int.Parse(command[2]); i++)
                    {
                        lists.Insert(0, lists[lists.Count - 1]);
                        lists.RemoveAt(lists.Count - 1);
                    }
                }
                command = Console.ReadLine().ToLower().Split().ToArray();
            }
            Console.WriteLine(string.Join(" ", lists));
        }
    }
}