9_Ski_trip.py

# ▪	"room for one person" – 18.00 лв за нощувка
# ▪	"apartment" – 25.00 лв за нощувка
# ▪	"president apartment" – 35.00 лв за нощувка

#11 days= 10 nights

days = int(input())
stay_type = input()  # "room for one person", "apartment", or "president apartment"
evaluation = input()  # "positive" or "negative"

night = days - 1

night_price = 0.0
discount = 0.0

if stay_type == 'room for one person':
    night_price = 18.00
    if days < 10:
        discount = 0.0
    elif days <= 15:  # [10, 15]
        discount = 0.0
    else:  # (15, inf) == [16, inf)
        discount = 0.0

elif stay_type == 'apartment':
    night_price = 25.00
    if days < 10:
        discount = 0.30
    elif days <= 15:  # [10, 15]
        discount = 0.35
    else:  # (15, inf) == [16, inf)
        discount = 0.50

elif stay_type == 'president apartment':
    night_price = 35.00
    if days < 10:
        discount = 0.10
    elif days <= 15:  # [10, 15]
        discount = 0.15
    else:  # (15, inf) == [16, inf)
        discount = 0.20

total_price = night * night_price * (1 - discount)

if evaluation == 'positive':
    total_price *= 1.25  # total_price = total_price * (1 + 0.25)
elif evaluation == 'negative':
    total_price *= 0.90  # total_price = total_price * (1 - 0.10)

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