[20251020] PGM / Lv2 / 괄호 회전하기 / 이강현 #1176
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🧷 문제 링크
https://school.programmers.co.kr/learn/courses/30/lessons/76502
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
소괄호,중괄호,대괄호로 이루어진 문자열이 있음.
괄호가 올바르게 잘 열리고 닫힌 경우에 옳은 문자열이라고 함.
괄호를 한칸씩 왼쪽으로 회전할때, 옳은 문자열의 전체 개수를 구하기.
🔍 풀이 방법
스택
그냥 한칸씩 회전하면서 스택 이용해서 괄호 쌍이 잘 맞는지 체크하면 댐.
⏳ 회고
뭔가 O(N)으로 한번에 옳은 문자열을 탐색할 수 있지 않을까하는 생각으로 접근하다가 오래걸림.
그냥 더럽게 짜버림 ㅎ