pokemon dont go exam 9 july 2 zadacha

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _02ProgramingFundamentalsIntensiveExamJuly2017
{
    class Program
    {
        static void Main(string[] args)
        {

            List<int > PokemonNumbers = Console.ReadLine().Split(' ').Select(int.Parse).ToList();
            int element = 0;
            List<int> RemovedPokemonNumbers = new List<int>();

            while(PokemonNumbers.Count!=0)
            {
                int index = int.Parse(Console.ReadLine());

                if(index<0)
                {
                    index = 0;
                    element = PokemonNumbers[index];
                    RemovedPokemonNumbers.Add(element);
                    PokemonNumbers.RemoveAt(index);
                    PokemonNumbers.Insert(index, PokemonNumbers.Last());

                }
                else if( index>PokemonNumbers.Count)
                {
                    index = PokemonNumbers.Count - 1;
                    element = PokemonNumbers[index];
                    RemovedPokemonNumbers.Add(element);
                    PokemonNumbers.RemoveAt(index);
                    PokemonNumbers.Insert(index, PokemonNumbers.First());
                }
                else
                {
                    element = PokemonNumbers[index];
                    RemovedPokemonNumbers.Add(element);
                    PokemonNumbers.RemoveAt(index);
                }

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

                }


            }
            Console.WriteLine("{0}",RemovedPokemonNumbers.Sum());



        }
    }
}