@[CCF_](/user/651786) 你的rebuild为啥是j啊,不应该是e[j].v吗
by LgxTpre @ 2022-11-25 17:24:17
@[LgxTpre](/user/66709) 谢谢! 可是[改了也WA.....](https://www.luogu.com.cn/record/95402576)
by yyc_ @ 2022-11-25 17:36:27