题解 | 牛牛的快递

from math import ceil
information = list(map(str, input().split()))

def price_compute(weight, emergency):
    if float(weight) <= 1:
        price = 20
    else:
        price = 20 + ceil(float(weight)-1) * 1 #向上取整
    
    if emergency == 'y':
        price += 5
    
    return price

price = price_compute(information[0], information[1])
print(int(price))