Solution -「洛谷 P5355」「YunoOI 2017」由乃的玉米田
DescriptionLink.见 Link。Solution前三个操作就是小清新人渣的本愿。这里简单讲解一下。记录两个 bitset cla 和 inv。我们考虑莫队。cla[x]==1 表示...
In mathematics you don't understand things, you just get used to them.
In mathematics you don't understand things, you just get used to them.