13. Ski Trip

days = int(input())
room = input()
rating = input()
nights = days - 1
price = 0
tips = 0
room_for_one = 18.00 * nights
apartment = 25.00 * nights
president_apartment = 35.00 * nights

if rating == "positive":
    tips = 1.25
else:
    tips = 0.9

if nights < 10:
    apartment *= 0.7
    president_apartment *= 0.9
elif 10 <= nights <= 15:
    apartment *= 0.65
    president_apartment *= 0.85
else:
    apartment *= 0.5
    president_apartment *= 0.8

if room == "room for one person":
    price = room_for_one * tips
elif room == "apartment":
    price = apartment * tips
else:
    price = president_apartment * tips

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