一个简单的数学问题
~~二分吧~~
by Masna_Kimoyo @ 2021-02-27 20:47:38
@[caijianhong](/user/390033) [P6685](https://www.luogu.com.cn/problem/P6685)
by hensier @ 2021-02-27 20:53:54
@[caijianhong](/user/390033) $\texttt{May be?}$
by liuzimingc @ 2021-02-27 20:56:27
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