[20251203] BOJ / G4 / 감시 카메라 / 권혁준 #1572
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🧷 문제 링크
https://www.acmicpc.net/problem/5884
🧭 풀이 시간
10분
👀 체감 난이도
✏️ 문제 설명
2차원 좌표평면에 N마리의 소가 있다.
감시 카메라는 한 수직선 또는 수평선 위의 모든 소를 감시할 수 있다.
감시 카메라 세 대로 모든 소를 감시할 수 있는지 알아보자.
🔍 풀이 방법
점들을 map, set을 이용해서 관리한다.
선 하나를 직접 그어서 map, set 내에 삭제 및 복구를 통해 나머지 선 두 개로 커버 가능한지 판별한다.
⏳ 회고
ez