单调队列可是o(n)的w
by fy0123 @ 2017-11-06 23:42:13
@[bestFy](/space/show?uid=19722) 这么神奇，谢谢啊！又要自学一波了XD
by AC自动机 @ 2017-11-07 00:08:57
@[FangHaosb](/space/show?uid=48560) 去看看题解吧有写
by fy0123 @ 2017-11-07 00:12:37