你怎么不去做做数学题
by LCuter @ 2018-10-02 21:13:17
~~本来想用线段树写的，但发现自己太蒻了写不对，还是糊了个模拟~~
by Ureka_Gestalt @ 2018-10-02 21:22:52
就是，数据范围就该开到n<=100！就不该有修改查询！
by ArachnidaKing @ 2018-10-30 19:32:15
……
by tfptfp @ 2019-01-24 21:14:01