PokemonDon'tGo_ListExercise

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

namespace PokemonDon_tGo
{
    class Program
    {
        static void Main()
        {
            List<int> pokemons = Console.ReadLine()
                .Split()
                .Select(int.Parse)
                .ToList();

            int sumOfRemovedElements = 0;

            while (pokemons.Count > 0)
            {
                int index = int.Parse(Console.ReadLine());

                if (index < 0)
                {
                    int removedNumberCase1 = 0;
                    pokemons.Insert(0, pokemons.Count - 1);
                    sumOfRemovedElements += pokemons[1];
                    removedNumberCase1 = pokemons[1];
                    pokemons.RemoveAt(1);

                    for (int i = 0; i < pokemons.Count; i++)
                    {
                        if (pokemons[i] <= removedNumberCase1)
                        {
                            pokemons[i] += removedNumberCase1;
                        }
                        else
                        {
                            pokemons[i] -= removedNumberCase1;
                        }
                    }
                }
                else if (index >= pokemons.Count)
                {
                    int removedNumberCase2 = 0;
                    sumOfRemovedElements += pokemons[pokemons.Count - 1];
                    removedNumberCase2 = pokemons[pokemons.Count - 1];
                    pokemons.RemoveAt(pokemons.Count - 1);
                    pokemons.Add(pokemons[0]);

                    for (int i = 0; i < pokemons.Count; i++)
                    {
                        if (pokemons[i] <= removedNumberCase2)
                        {
                            pokemons[i] += removedNumberCase2;
                        }
                        else
                        {
                            pokemons[i] -= removedNumberCase2;
                        }
                    }
                }
                else
                {
                    int removedNumberCase3 = pokemons[index];
                    sumOfRemovedElements += removedNumberCase3;
                    pokemons.RemoveAt(index);

                    for (int i = 0; i < pokemons.Count; i++)
                    {
                        if (pokemons[i] <= removedNumberCase3)
                        {
                            pokemons[i] += removedNumberCase3;
                        }
                        else
                        {
                            pokemons[i] -= removedNumberCase3;
                        }
                    }
                }
            }

            Console.WriteLine(sumOfRemovedElements);
        }
    }
}