PrFund_Exam_09July2017_Problem02

using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using System.Text;

namespace PokemonDontGo_Exam_09July2017
{
    class MainClass
    {
        /* */

        public static void Main()
        {
            char[] sepSpace = { ' ' };
            var input = Console.ReadLine()
                              .Split(sepSpace, StringSplitOptions.RemoveEmptyEntries)
                               .Select(long.Parse)
                               .ToList();
            var inputCopy = new List<long>();

            for (int a = 0; a < input.Count; a++)
            {
                inputCopy.Add(input[a]);
            }
            long valueOfRemoved = 0;
            long valueExchange = 0;
            var listOfRemoved = new List<long>();
            while(inputCopy.Count > 0)
            {
                int index = int.Parse(Console.ReadLine());
                if(index >= 0 && index <= inputCopy.Count - 1)//return <=, necessary if
                {
                    valueOfRemoved = input[index];
                    listOfRemoved.Add(valueOfRemoved);
                    inputCopy.RemoveAt(index);
                    for (int i = 0; i < inputCopy.Count; i++)
                    {
                        if(inputCopy[i] <= valueOfRemoved)
                        {
                            inputCopy[i] += valueOfRemoved;
                        }
                        else
                        {
                            inputCopy[i] -= valueOfRemoved;
                        }
                    }
                }
                else if(index < 0)
                {
                    valueOfRemoved = inputCopy[0];
                    listOfRemoved.Add(valueOfRemoved);
                    valueExchange = inputCopy[inputCopy.Count - 1];
                    inputCopy[0] = valueExchange;
                    for (int z = 0; z < inputCopy.Count; z++)
                    {
                        if(inputCopy[z] <= valueOfRemoved)
                        {
                            inputCopy[z] += valueOfRemoved;
                        }
                        else
                        {
                            inputCopy[z] -= valueOfRemoved;
                        }
                    }
                }
                else
                {
                    valueOfRemoved = inputCopy[inputCopy.Count - 1];
                    listOfRemoved.Add(valueOfRemoved);
                    valueExchange = inputCopy[0];
                    inputCopy[inputCopy.Count - 1] = valueExchange;
                    for (int f = 0; f < inputCopy.Count; f++)
                    {
                        if(inputCopy[f] <= valueOfRemoved)
                        {
                            inputCopy[f] += valueOfRemoved;
                        }
                        else
                        {
                            inputCopy[f] -= valueOfRemoved;
                        }
                    }
                }
            }
            Console.Write(listOfRemoved.Sum());
        }
    }
}