@[Svemit](/user/503792) 题解的有一个分治,是不是cdq我就不知道了,我还没学,我试下莫队可以过不。
by onlyfiee @ 2023-07-16 17:13:27
~~友利~~
by onlyfiee @ 2023-07-16 17:13:45
~~似乎莫队挺好做~~
by onlyfiee @ 2023-07-16 17:15:27