budget = float(input())

count = 0
total = 0
product_count = 0
product_price = 0
product_name = ""


while budget > 0:
    product_name = input()
    if product_name == "Stop":
        break
    product_price = float(input())
    if product_price > budget:
        break

    count = count + 1
    product_count = product_count + 1

    if count % 3 == 0:
        product_price = product_price / 2

    budget = budget - product_price
    total = total + product_price



if product_name == "Stop":
    print(f"You bought {product_count} products for {total:.2f} leva.")
elif product_price >= budget:
    diff = product_price - budget
    print("You don't have enough money!")
    print(f"You need {abs(diff):.2f} leva!")