Ski trip / 13/5

days_stay = int(input())
room_type = input()
feedback = input()

price = 0

if room_type == "room for one person":
    price = (days_stay - 1) * 18
elif room_type == "apartment":
    price = (days_stay - 1) * 25
    if days_stay < 10:
        price -= price * 0.3
    elif 10 <= days_stay < 15:
        price -= price * 0.35
    elif days_stay >= 15:
        price -= price * 0.50

elif room_type == "president apartment":
    price = (days_stay - 1) * 35
    if days_stay < 10:
        price -= price * 0.1
    elif 10 <= days_stay < 15:
        price -= price * 0.15
    elif days_stay >= 15:
        price -= price * 0.20

if feedback == "positive":
    price += price * 0.25
else:
    price -= price * 0.10

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