@[minstdfx](/user/100250)
@[Maxmilite](/user/274993)
by Yizhixiaoyun @ 2023-01-15 11:43:52
$\dfrac{n}{2}$
by liangbowen @ 2023-01-15 12:06:45
```\frac{1}{2}```
$\frac{1}{2}$
by rsy_ @ 2023-01-15 12:13:14
@[liangbowen](/user/367488) 啊，改的时候忘了用分数了
by Yizhixiaoyun @ 2023-01-15 12:38:54
@[Yizhixiaoyun](/user/590864) Done, thx.
by Maxmilite @ 2023-01-15 15:57:33