house_robber.py

"""
You are a professional robber planning to rob houses along a street.
Each house has a certain amount of money stashed,
the only constraint stopping you from robbing each of them
is that adjacent houses have security system connected and
it will automatically contact the police if two adjacent houses
were broken into on the same night.

Given a list of non-negative integers representing the amount of money
of each house, determine the maximum amount of money you
can rob tonight without alerting the police.
"""


def house_robber(houses):
    last, now = 0, 0
    for house in houses:
        last, now = now, max(last + house, now)
    return now