Prog. Fundam. Exam-09.July.17 Part1- 02. Pokemon Don't Go

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

namespace _12._ExamPreparation1
{
    class ExamPreparation1
    {
      static void Main(string[] args)
        {
            List<int> distances = Console.ReadLine().Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries).Select(int.Parse).ToList();
            List<int> removed = new List<int>();
            int num = 0;

            while (distances.Count > 0)
            {
                int removeIndex = int.Parse(Console.ReadLine());
                if (removeIndex < 0)
                {
                    num = distances[0];
                    distances.RemoveAt(0);
                    distances.Insert(0, distances[distances.Count - 1]);
                    removed.Add(num);
                }
                else
                {
                    try
                    {
                        num = distances[removeIndex];
                        removed.Add(distances[removeIndex]);
                        distances.RemoveAt(removeIndex);

                    }
                    catch
                    {

                        distances.RemoveAt(distances.Count - 1);
                        distances.Add(distances[0]);
                        num = distances[0];
                        removed.Add(num);
                    }
                }

                for (int i = 0; i < distances.Count; i++)
                {
                    if (distances[i] <= num)
                    {
                        distances[i] += num;
                    }
                    else if (distances[i] > num)
                    {
                        distances[i] -= num;
                    }
                }
            }
            Console.WriteLine(removed.Sum());
        }
    }
}