最好按原题来吧()fjy 别卷了/oh
by Daniel_lele @ 2023-03-06 21:28:51
可是我真的被卡爆了(悲)
by fjy666 @ 2023-03-06 21:29:43
应该是有 $O(n\log n)$ 的做法的?
by Daniel_lele @ 2023-03-06 21:34:27