@[strangers](/space/show?uid=52452) <https://www.luogu.org/problem/U83734>
by 仰望半月的夜 @ 2019-08-16 18:52:03
我前天at了管理员加题，但是至今未回复
by 仰望半月的夜 @ 2019-08-16 18:52:47
~~P1197~~
by Presentation_Emitter @ 2019-10-13 10:12:13
~~金刚石版本呢？~~
by 骗分过样例 @ 2020-02-20 19:42:28