vv

count_days = int(input())
type_room = input()
review = input()
count_nights = count_days - 1
price = 0
if type_room == 'room for one person':
    price = count_nights * 18.00
elif type_room == 'apartment':
    price = count_nights * 25.00
    if count_days < 10:
        price -= price * 0.3
    elif 10 <= count_days <= 15:
        price -= price * 0.35
    elif count_days > 15:
        price -= price * 0.50
elif type_room == 'president apartment':
    price = count_nights * 35.00
    if count_days < 10:
        price -= price * 0.10
    elif 10 <= count_days <= 15:
        price -= price * 0.15
    elif count_days > 15:
        price -= price * 0.20

if review == 'positive':
    price += price * 0.25
else:
    price -= price * 0.10

print(f'{price:.2f}')