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🧷 문제 링크
https://www.acmicpc.net/problem/15809
🧭 풀이 시간
50분
👀 체감 난이도
✏️ 문제 설명
국가들이 동맹과 전쟁을 하는데 모든 기록이 끝나고 남은 나라의 병력은?
🔍 풀이 방법
분리 집합을 사용하는데 집합을 합치는 기준이 size배열이 아니라 power배열 기준이다.
⏳ 회고
size만 쓰다보니까 일반적인 union find를 까먹어서 size배열 필요없는데 썼다. size가 아니라 power가 집합을 합치는 기준이 된다는 게 제일 중요했다.