1번 도서 대여점 운영 class Book(metaclass=ABCMeta): @abstractmethod def get_rental_price(self, day): pass class ComicBook(Book): def get_rental_price(self,day): cost = 500 day -= 2 if day > 0: cost += 200*day return cost class Novel(Book): def get_rental_price(self,day): cost = 1000 day -= 3 if day > 0: cost += 300*day return cost 2번 지하철 기다리기 def solution(subway_times, current_time): current_minute = fu..