Ski Trip

days_for_stay = int(input())
type_of_room = input()
rating = input()
costs = 0
days_for_stay -= 1

if days_for_stay < 10:
    if type_of_room == 'room for one person':
        costs = 18 * days_for_stay
    elif type_of_room == 'apartment':
        costs = 25 * days_for_stay
        costs -= costs * 0.30
    elif type_of_room == 'president apartment':
        costs = 35 * days_for_stay
        costs -= costs * 0.10

elif 10 <= days_for_stay <= 15:
    if type_of_room == 'room for one person':
        costs = 18 * days_for_stay
    elif type_of_room == 'apartment':
        costs = 25 * days_for_stay
        costs -= costs * 0.35
    elif type_of_room == 'president apartment':
        costs = 35 * days_for_stay
        costs -= costs * 0.15

elif days_for_stay > 15:
    if type_of_room == 'room for one person':
        costs = 18 * days_for_stay
    elif type_of_room == 'apartment':
        costs = 25 * days_for_stay
        costs -= costs * 0.50
    elif type_of_room == 'president apartment':
        costs = 35 * days_for_stay
        costs -= costs * 0.20


if rating == 'positive':
    costs += costs * 0.25
else:
    costs -= costs * 0.10

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