def get_chain_length(data):
    return max(*reduce(lambda a, i: (max(a[0], a[1]), a[1] + 1 if i > 0 else 0), data, (0, 0)))

data = [0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1]
print(get_chain_length(data))


def fib(n):
    return reduce(lambda a, i: (a[1], a[0] + a[1]), range(n), (0, 1))[0]

print(fib(9))