Udacity - Python 练习笔记Stamps

# Define a procedure, stamps, which takes as its input a positive integer in

# pence and returns the number of 5p, 2p and 1p stamps (p is pence) required

# to make up that value. The return value should be a tuple of three numbers

# (that is, your return statement should be followed by the number of 5p,

# the number of 2p, and the nuber of 1p stamps).

#

# Your answer should use as few total stamps as possible by first using as

# many 5p stamps as possible, then 2 pence stamps and finally 1p stamps as

# needed to make up the total.

#

# (No fair for USians to just say use a "Forever" stamp and be done with it!)

#

def stamps(n):

# Your code here

five = (n - (n % 5)) / 5

two = ((n - five * 5) - (n - five * 5) % 2) / 2

one = (n - five*5 - two*2) / 1

return five, two, one

print stamps(8)

#>>> (1, 1, 1)  # one 5p stamp, one 2p stamp and one 1p stamp

print stamps(5)

#>>> (1, 0, 0)  # one 5p stamp, no 2p stamps and no 1p stamps

print stamps(29)

#>>> (5, 2, 0)  # five 5p stamps, two 2p stamps and no 1p stamps

print stamps(0)

#>>> (0, 0, 0) # no 5p stamps, no 2p stamps and no 1p stamps