04. Transport Price

# 04. Transport Price
n = int(input())
m = input()
taxi_day = 0.79
taxi_night = 0.90
bus = 0.09
train = 0.06
if n <= 19:
    if m == "day":
        taxi_price = 0.70 + (taxi_day * n)
        print(f"{taxi_price:.2f}")
    elif m == "night":
        taxi_price = 0.70 + (taxi_night * n)
        print(f"{taxi_price:.2f}")
if n >= 20 and n <= 99:
    if m == "day" or m == "night":
        bus_price = bus * n
        print(f"{bus_price:.2f}")
if n >= 100:
    if m == "day":
        train_price = train * n
        print(f"{train_price:.2f}")
    elif m == "night":
        train_price = train * n
        print(f"{train_price:.2f}")