[20260112] BOJ / G3 / 트리를 복잡하게 색칠하는 최소 비용 / 이강현#1787
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ShinHeeEul merged 1 commit intomainfrom Jan 12, 2026
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🧷 문제 링크
https://www.acmicpc.net/problem/25690
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
트리의 정점을 색칠할거임.
이웃한 두 정점이 white,white 혹은 white,black이 되게끔 색칠해야하는데 정점마다 white,black 색칠하는 비용이 서로다름
조건을 만족하면서 최소비용으로 트리내 정점을 모두 색칠하는 비용을 출력하자.
🔍 풀이 방법
트리 dp
dfs로 진입하면서 색칠하기
⏳ 회고
트리 dp를 저번에 처음 접해봐서 하나 더 풀어봤는데 감이 잡히는 듯 하다.