打错了 是4281
by PolandBallOffical @ 2019-07-16 23:30:25
https://www.luogu.org/recordnew/show/20955788
MLE记录
by PolandBallOffical @ 2019-07-16 23:31:16
N=50也不行
by PolandBallOffical @ 2019-07-16 23:31:45