import java.util.*;

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

        String input = scanner.nextLine();
        Map<String, ArrayList<Double>> orders = new LinkedHashMap<>();

        while(!input.equals("buy")) {
            String[] data = input.split("\\s+");
            String product = data[0];
            double price = Double.parseDouble(data[1]);
            Double quantity = Double.parseDouble(data[2]);

            if (!orders.containsKey(product)) {
                orders.put(product, new ArrayList<>());
                orders.get(product).add(price);
                orders.get(product).add(quantity);
            } else {
                orders.get(product).remove(0);
                orders.get(product).add(0, price);
                orders.get(product).add(orders.get(product).get(1) + quantity);
                orders.get(product).remove(1);
            }

            input = scanner.nextLine();
        }

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

        orders.entrySet()
                .forEach(e -> {
                    double priceQuantity = e.getValue().get(0)
                            * e.getValue().get(1);
                    finalPrice.put(e.getKey(), priceQuantity);
                });

        finalPrice.entrySet()
                .forEach(e -> {
                    System.out.println(String.format("%s -> %.2f",
                            e.getKey(), e.getValue()));
                });

    }
}