[20260122] BOJ / G5 / 트리와 쿼리 / 한종욱 #1813
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🧷 문제 링크
https://www.acmicpc.net/problem/15681
🧭 풀이 시간
20분
👀 체감 난이도
✏️ 문제 설명
각 트리의 서브쿼리의 노드 개수를 구하시오.
🔍 풀이 방법
처음엔 BFS로 구하려고 했는데, 모든 상태를 전이하는 것이 말이 안됐다.
DFS로 바텀업 형식으로 구현했다.
⏳ 회고
트리부분을 하기 싫었는데 이제 시작한다.