08. Ski Trip

days = int(input())
type = input()
estimation = input()
price = 0

if days < 10:
    if type == 'room for one person':
        price = (days-1) * 18
    elif type =='apartment':
        price = (days - 1) * 25
        price = price - (price*0.25)
    elif type == 'president apartment':
        price = (days - 1) * 35
        price = price - (price * 0.10)
elif days >= 10 and days < 15:
    if type == 'room for one person':
        price = (days-1) * 18
    elif type =='apartment':
        price = (days - 1) * 25
        price = price - (price*0.35)
    elif type == 'president apartment':
        price = (days - 1) * 35
        price = price - (price * 0.15)

elif days >= 15:
    if type == 'room for one person':
        price = (days-1) * 18
    elif type =='apartment':
        price = (days - 1) * 25
        price = price - (price*0.50)
    elif type == 'president apartment':
        price = (days - 1) * 35
        price = price - (price * 0.20)

if estimation == 'positive':
    price = price + (price*0.25)
else:
    price = price - (price*0.10)

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