문제 링크

정답 :

def solution(date1, date2):

    date1 = ''.join([str(i) for i in date1])
    date2 = ''.join([str(i) for i in date2])

    return int(int(date1) < int(date2))

방법 1:

def solution(date1, date2):
    return int(date1 < date2)