@[liyishao1125](/user/560968) 你这无解的情况判了跟没判断好像没有区别啊（跑完 prim 后 cnt 一定 == n 啊（
by OldDriverTree @ 2024-01-24 09:59:07
@[OldDriverTree](/user/681036) 感谢
[已AC](https://www.luogu.com.cn/record/144075971)
by liyishao1125 @ 2024-01-24 10:03:08