solution for: https://programmers.co.kr/learn/courses/30/lessons/17681?language=python3

solution.py

def decrypt(row, size):
    mask = 1 << (size - 1)
    while mask:
        yield '#' if (row & mask) else ' '
        mask = mask >> 1

def solution(n, arr1, arr2):
    answer = []
    for row in (a|b for a, b in zip(arr1, arr2)):
        answer.append(''.join(decrypt(row, n)))

    return answer