题解 | 牛牛的快递

import math
a,b = input().split()
m = float(a)
money = 0
if b == "n":
    if m <= 1:
        money = 20
    elif m > 1:
        if m == int(m):
            money = 20 + m - 1
        elif m != int(m):
            money = 20 + int(m - 1) + 1
elif b == "y":
    if m <= 1:
        money = 25
    elif m > 1:
        if m == int(m):
            money = 20 + m + 4
        elif m != int(m):
            money = 20 + int(m - 1) + 6
print(int(money))