BinaryGap

Python

# you can write to stdout for debuggin
def solution(N):
    # write your code in Python 3.6
    number_str = bin(N)[2:]
    number_arr = number_str.split("1")

    if number_arr[-1] != "":
        return 0

    l = [len(v) for v in number_arr if number_arr]
    
    if len(l) == 0:
        return 0
    return max(l)