判所加的边数是不是点数-1
by sodak @ 2020-11-25 06:27:23
不嫌麻烦的话写个并查集也不戳嘞√
by Carlotta @ 2020-12-04 21:04:07
实测本题无orz数据
by Blueqwq @ 2020-12-05 19:57:35