[20250916] BOJ / G2 / 제국 / 한종욱 #903
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🧷 문제 링크
https://www.acmicpc.net/problem/16402
🧭 풀이 시간
60분
👀 체감 난이도
✏️ 문제 설명
전쟁을 하는데 속국이 전쟁에 참여해서 지면 속국의 종주국까지 포함해서 상대 종주국에 귀속됨. 전쟁의 마지막에 종주국이 몇 개인지, 어떤 종주국이 있는지 알아라.
🔍 풀이 방법
분리집합을 사용하는데, union에서 승패에 따라 종주국을 잘 포함한다.
⏳ 회고
오랜만에 ai없이 내 힘으로 풀었는데, 기분이 좋다. 쉬웠던 문제