https://github.com/VISUALBoostcampCV/CodingStudy/blob/c2805214239bae993f28cb4d669af17dddfbdc36/%EC%B5%9C%EC%86%8C%EC%A7%81%EC%82%AC%EA%B0%81%ED%98%95/sehwa.py#L9-L11 w, h = h, w로 구현하는 것이 더 pythonic 한 풀이법!