import java.util.*;

public class Orders {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        LinkedHashMap<String, List<Double>> product = new LinkedHashMap();
        String comanda  = scanner.nextLine();
        while (!comanda.equals("buy")){
            String [] tokens  = comanda.split("\\s+");
            String name = tokens[0];
            double price = Double.parseDouble(tokens[1]);
            int quantities = Integer.parseInt(tokens[2]);
           // double total = price*quantities;
            if (product.containsKey(name)){
                List<Double> value =product.get(name);
                value.set(0,price);
                quantities+=value.get(1);
                value.set(1,quantities*1.00);
                product.put(name,value);

            }else {
                List<Double> value = new ArrayList<>();
                value.add(price);
                value.add(quantities*1.00);
                product.put(name,value);
            }
            comanda=scanner.nextLine();
            }
        for (Map.Entry<String, List<Double>> entry : product.entrySet()) {
            List<Double> arr = entry.getValue();
            System.out.printf("%s -> %.2f%n",entry.getKey(),arr.get(0)*arr.get(1));
        }

        // product.entrySet().forEach(e->e.);



        }
    }