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This discussion was converted from issue #46 on September 15, 2026 10:47.
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Contest Link
https://atcoder.jp/contests/abc231
Solved problems
A, B, C, D
Brief explanations
A, B, C: 간단
D: 결론만 말하면 연결된 곳이 3개 이상이거나 사이클이 있을 경우 No가 출력되어야 한다.
불친절한 예제로 직접 예외 케이스를 찾아야 한다.
엄청난 삽질.. 끝에 dsu로 풀긴 풀었다.
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