@[lovely_codingcow](/user/765847) 我求树的重心不用特判也能过。[提交记录](https://www.luogu.com.cn/record/134506823) by xudongyi1 @ 2024-01-23 10:03:26
《特判》 by Y_QWQ_Y @ 2024-05-05 16:18:37