04.Orders

import java.util.*;

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

        Map<String, Map<Double, Integer>> map = new LinkedHashMap<>();

        String command = scanner.nextLine();

        while (!"buy".equals(command)) {
            String[] array = command.trim().split("\\s+");
            String product = array[0];
            double price = Double.parseDouble(array[1]);
            int quantity = Integer.parseInt(array[2]);

            if (map.containsKey(product)) {
                map.get(product).put(price, map.get(product).get(price) + quantity);
            } else {
                map.putIfAbsent(product, new LinkedHashMap<>());
                map.get(product).put(price, quantity);
            }

            command = scanner.nextLine();
        }
        map
                .forEach((k, v) -> {
                    System.out.printf("%s -> ", k);
                    v
                            .forEach((key, value) -> System.out.printf("%.2f%n", key * value));
                });
    }
}