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🧷 문제 링크
https://www.acmicpc.net/problem/5052
🧭 풀이 시간
50분
👀 체감 난이도
✏️ 문제 설명
전화번호 목록이 주어졌을 때
한 전화번호가 다른 어떤 전화번호의 접두사가 아닌 경우 YES
한 전화번호가 다른 전화번호의 접두사인 경우 NO 를 출력하는 문제입니다.
🔍 풀이 방법
String 배열로 전화번호 목록을 만든 후
오름차순으로 정렬해서 접두사인지 체크했습니다.
⏳ 회고
처음에 접두사가 아니라 한 전화번호가 다른 전화번호의 일부가 되면 안되는 줄 알고 삽질했습니다;;