这是弱化版啊,O(n^2)水过。。。
by yhf2000 @ 2017-02-26 21:58:03
所以就应该再出个加强版啊(雾)
by wzf2000 @ 2017-07-12 14:37:23
其实是ioi2002
by qiangxinwei @ 2019-10-29 14:09:27