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🧷 문제 링크
https://www.acmicpc.net/problem/1154
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
학생이$N$ 명 주어지고, 서로 아는 관계가 모두 주어진다. (간선 형태로)
학생들을 두 팀으로 나눠보자.
각 팀에 속한 학생들끼리는 서로 모두 아는 관계여야 한다.
🔍 풀이 방법
1부터 시작해서, 서로 아는 관계가 아닌 점들로 계속 탐색을 이어갔다.(dfs)
탐색 중에 모순이 발생하면 해가 없고, 그렇지 않으면 두 팀을 출력해줬다.
⏳ 회고
문제에 두 팀으로 나누라고 되어있어서, N = 1인 경우에는 당연히 불가능인 줄 알았는데, 팀이 비어있어도 되는 거였다.
너무 화가 난다