Orders [Mimi]

import java.util.*;

public class _04_Orders {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        Map<String, ArrayList<Double>> productsByPriceAndQ = new LinkedHashMap<>();
        List<Double> values = new ArrayList<>();

        String item = "";
        String input = "";

        while (!"buy".equals(input = scanner.nextLine())) {
            String[] line = input.split("\\s+");

            item = line[0];
            double price = Double.parseDouble(line[1]);
            double q = Double.parseDouble(line[2]);

            productsByPriceAndQ.putIfAbsent(item, new ArrayList<>());
            values = productsByPriceAndQ.get(item);
            if (values.isEmpty()) {
                values.add(price);
                values.add(q);
            } else {
                if (price != productsByPriceAndQ.get(item).get(0)) {
                    values.set(0, Double.parseDouble(line[1]));
                    values.set(1, productsByPriceAndQ.get(item).get(1)+q);
                }
            }
        }

        productsByPriceAndQ.entrySet()
                .stream()
                .forEach(entry -> {
                    System.out.println(String.format("%s -> %.2f",
                            entry.getKey(), entry.getValue().get(0) * entry.getValue().get(1)));
                });
    }
}