2019-09-12 10:33:56 -07:00
|
|
|
from itertools import (accumulate, chain)
|
|
|
|
|
from operator import mul
|
|
|
|
|
|
|
|
|
|
# factorial :: Integer
|
2015-02-20 00:35:01 -05:00
|
|
|
def factorial(n):
|
2019-09-12 10:33:56 -07:00
|
|
|
return list(
|
|
|
|
|
accumulate(chain([1], range(1, 1 + n)), mul)
|
|
|
|
|
)[-1]
|
