~~所以你为什么不想正解？~~
by NKL丶 @ 2019-02-17 13:26:28
感觉斜率优化裸题？
by Siyuan @ 2019-02-17 13:33:28
@[Siyuan](/space/show?uid=49725) 自闭了题目没看清。。（上面当我没说 QAQ）
by Siyuan @ 2019-02-17 13:35:21