05. Tourist Shop

budget = float(input())
product = input()
# спираме -> product == "Stop"
# продължаваме -> product != "Stop"
# product -> продукт или Stop
count_products = 0
sum = 0
while product != "Stop":
    price = float(input())
    count_products += 1
    if count_products % 3 == 0:
        sum += price / 2
    else:
        sum += price

    if sum > budget:
        print("You don't have enough money!")
        need_money = sum - budget
        print(f"You need {need_money:.2f} leva!")
        break
    product = input()
else:
    print(f"You bought {count_products} products for {sum:.2f} leva.")