请求修复题面

CF809E Surprise me!

@[chen_zhe](/user/8457)
by Polaris_Dane @ 2020-05-16 18:56:46


$\frac{1}{n(n-1)}\sum_{i=1}^n\sum_{j=1}^n\varphi(a_i*a_j)·dist(i,j)$ 在这似乎是好的
by SUNCHAOYI @ 2020-05-16 19:00:34


@[Polaris_Dane](/user/78290) fixed
by chen_zhe @ 2020-05-16 19:02:04


Aya速度!
by SUNCHAOYI @ 2020-05-16 19:03:28


@[chen_zhe](/user/8457) Thanks (〃'▽'〃)
by Polaris_Dane @ 2020-05-16 19:04:55


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