wgzs，另外求助帖发在这里：[P2240讨论版](https://www.luogu.com.cn/discuss/lists?forumname=P2240)
by caramel_qwq @ 2021-07-28 08:24:30
@[幸运小崽n3](/user/444195) 谢谢（づ￣3￣）づ╭❤～
by haos @ 2021-07-28 09:35:58