전화번호 목록
def solution(phone_book): phone_book.sort() for i in range(len(phone_book)-1): if phone_book(i) == phone_book(i+1)(:len(phone_book(i))): return False return True
def solution(phone_book): phone_book.sort() for i in range(len(phone_book)-1): if phone_book(i) == phone_book(i+1)(:len(phone_book(i))): return False return True