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gcd 题解
摘要：gcd Little White learned the greatest common divisor, so she plan to solve a problem: given \(x, n,\) query \(\sum_{a=1}^n\sum_{b=1}^ngcd(x^a−1,x^b−1) 阅读全文
posted @ 2019-11-23 08:58 ファイナル 阅读(236) 评论(0) 推荐(0)