it's a test

balabala

 

 $x=\frac{{-b}\pm\sqrt{b^2-4ac}}{2a}$

#include<>
#dzdbcl
int main(){}

 

balashenme

posted @ 2020-02-08 16:36  shenben's_bro  阅读(236)  评论(0编辑  收藏  举报