프로그래머스 전화번호 목록 (level 2)

https://programmers.co.kr/learn/courses/30/lessons/42577

코딩테스트 연습 - 전화번호 목록

# 나의 코드

def solution(phone_book):
    answer = True
    phone_book.sort()
    for i in range(len(phone_book)):
        first = phone_book[i]
        for j in range(i+1, len(phone_book)):
            if first == phone_book[j][0:len(first)]:
                answer = False
                break
        if answer == False:
            break
    return answer

# 참고

def solution(phoneBook):
    phoneBook = sorted(phoneBook)

    for p1, p2 in zip(phoneBook, phoneBook[1:]):
        if p2.startswith(p1):
            return False
    return True