CCF 201709-1 打酱油Python 代码

n = int(input())
#买酱油总瓶数
number = 0
if n == 0:
    print(number)
if n != 0:
    #//除法取整  %除法取余
    a = int(n // 10)
    # a为买酱油的总瓶数，b为五瓶出现的次数，c用于计算买了三瓶的次数
    b = int(a // 5)
    number = a + b * 2
    c = int(a % 5)
    d = int(c // 3)
    number = number + d*1
print(number)