Tony102's Blog - VP: AtCoder Regular Contest 123 (ARC123) 的评论
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link: https://tony102.com/index.php/archives/225/
description: 一场 VP naive 四道题A就是要求：$A_1 +A_3 = 2 \times A_2$有两种方式，取 $\min {(A_1 + A_3 - 2 \times A_2, \frac{A_1...