data = input()
products = {}

while data != "buy":
    key, price, value = data.split()
    if key not in products:
        price = float(price)
        value = int(value) * price
        products[key] = float(value)
    else:
        price = float(price)
        value = int(value) * price
        products[key] += float(value)
    data = input()

for key, value in products.items():
    print(f"{key} -> {products[key]:.2f}")