题目数据太弱（ by LIUZHIYU1 @ 2023-08-01 22:46:30
@[LIUZHIYU1](/user/683780) 最好还是这么写： ```cpp if(dis>-1e-10&&dis<1e-10) ``` by Falling_Sakura @ 2023-08-02 07:52:14