你都改了一点才过的吧，某道sdoi还是noip原题……
by doge233 @ 2018-03-09 14:59:43
$\mathrm{RNG}$ 劲啊！
by zzlzk @ 2018-03-09 15:12:48
@[doge233](/space/show?uid=36102) 哪道啊qwq
by Xeonacid @ 2018-03-09 15:33:17
@[Xeonacid](/space/show?uid=50954)
https://www.luogu.org/problemnew/show/P2491
和树网的核一样
by doge233 @ 2018-03-09 15:39:21