SantasPresentFactory

import java.util.*;

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

        ArrayDeque<Integer> materials = new ArrayDeque<>();
        Arrays.stream(scanner.nextLine().split(" "))
                .mapToInt(Integer::parseInt)
                .forEach(materials::push);

        ArrayDeque<Integer> magics = new ArrayDeque<>();
        Arrays.stream(scanner.nextLine().split(" "))
                .mapToInt(Integer::parseInt)
                .forEach(magics::offer);

        TreeMap<String, Integer> presents = new TreeMap<>(); // will be sorted by name ascending
        HashMap<Integer, String> wishList = new HashMap<>();
        wishList.put(150, "Doll");
        wishList.put(250, "Wooden train");
        wishList.put(300, "Teddy bear");
        wishList.put(400, "Bicycle");
        int counter = 0;

        while (!materials.isEmpty() && !magics.isEmpty()) {
            int material = materials.peek();
            int magic = magics.peek();

            int result = material * magic;

            if (wishList.containsKey(result)) {
                String item = wishList.get(result);
                materials.pop();
                magics.poll();

                if (!presents.containsKey(item)) {
                    presents.put(item, 1);
                } else {
                    int countOfCurrentPresents = presents.get(item);
                    countOfCurrentPresents++;
                    presents.put(item, countOfCurrentPresents);
                }
            } else if (result > 0) {
                materials.push(materials.pop() + 15);
                magics.poll();
            } else if (result < 0) {
                int sum = materials.peek() + magics.peek();
                materials.pop();
                magics.poll();
//                magics.push(sum);
                materials.push(sum);
            } else if (result == 0) {
                if (materials.peek() == 0) {
                    materials.pop();
                } else if (magics.peek() == 0) {
                    magics.poll();
                }
            }
        }

        if (presents.containsKey("Doll") && presents.containsKey("Wooden train")
                || presents.containsKey("Teddy bear") && presents.containsKey("Bicycle")) {
            System.out.println("The presents are crafted! Merry Christmas!");
            if (!materials.isEmpty()) {
                System.out.print("Materials left: ");
                System.out.println(getArrayDequeAsString(", ", materials));
            }
            if (!magics.isEmpty()) {
                System.out.print("Magic left: ");
                System.out.println(getArrayDequeAsString(", ", magics));
            }
        } else {
            System.out.println("No presents this Christmas!");
            if (!materials.isEmpty()) {
                System.out.print("Materials left: ");
                System.out.println(getArrayDequeAsString(", ", materials));
            }
            if (!magics.isEmpty()) {
                System.out.print("Magic left: ");
                System.out.println(getArrayDequeAsString(", ", magics));
            }

        }

        for (Map.Entry<String, Integer> nameCount : presents.entrySet()) {
            System.out.printf("%s: %d%n", nameCount.getKey(), nameCount.getValue());
        }
    }

    static String getArrayDequeAsString(String delimiter, ArrayDeque<Integer> arrayDeque) {
        StringBuilder result = new StringBuilder();
        for (Integer integer : arrayDeque) {
            result.append(integer).append(delimiter);
        }

        return result.substring(0, result.lastIndexOf(delimiter)); // return everything except last delimiter
    }
}