Pokemon Don't Go

import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
import java.util.stream.Collectors;

public class PokemonDontGo {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        List<Integer> distancePokemons = Arrays
                .stream(scanner.nextLine().split(" "))
                .map(Integer::parseInt)
                .collect(Collectors.toList());

        int sum = 0;
        while (distancePokemons.size() > 0) {
            int index = Integer.parseInt(scanner.nextLine());

            if (index >= 0 && index <= distancePokemons.size() - 1) {
                int removedElement = distancePokemons.get(index);
                sum += removedElement;
                distancePokemons.remove(index);
                changeElements(distancePokemons, removedElement);
            } else if (index < 0) {
                int removedElementFirst = distancePokemons.get(0);
                sum += removedElementFirst;
                int lastElement = distancePokemons.get(distancePokemons.size() - 1);
                distancePokemons.set(0, lastElement);
                changeElements(distancePokemons, removedElementFirst);
            } else if (index > distancePokemons.size() - 1) {
                int removedElementLast = distancePokemons.get(distancePokemons.size() - 1);
                sum += removedElementLast;
                int firstElement = distancePokemons.get(0);
                distancePokemons.set(distancePokemons.size() - 1, firstElement);
                changeElements(distancePokemons, removedElementLast);
            }
        }
        System.out.println(sum);
    }

    private static void changeElements(List<Integer> distancePokemons, int removedElement) {

        for (int listIndex = 0; listIndex <= distancePokemons.size() - 1; listIndex++) {
            int currentNumber = distancePokemons.get(listIndex);
            if (currentNumber <= removedElement) {
                currentNumber += removedElement;
            } else {
                currentNumber -= removedElement;
            }
            distancePokemons.set(listIndex, currentNumber);
        }
    }
}