yourcelf

from __future__ import division, print_function
from itertools import permutations, combinations_with_replacement, product

def guarded_exponentiation(a,b):
    """
    Raise a to the power of b, but only if the result won't be silly large, as
    silly largeness slows us way down.
    """
    if (a > 1 or a < -1) and b > 1000:
        raise OverflowError

yourcelf

#!/usr/bin/env python
# Simulation of the 'Can you cross the river' riddler problem:
# https://fivethirtyeight.com/features/night-falls-a-storm-rolls-in-can-you-cross-the-river/
#
#      n   
#   /  |  \ 
#  a - b - c
#  |   |   |
#  d - e - f
#   \  |  /