@[小粉兔](/user/10703) @[mrsrz](/user/6813)
by vectorwyx @ 2021-01-20 12:05:42
以原题为准吧
而且还有更奇妙的$O(Tnk)$的做法没卡掉
by w23c3c3 @ 2021-01-20 12:52:58
还有加强版可以做CF452F
by w23c3c3 @ 2021-01-20 12:56:09