摘要: T1 A 题目大意:给定长度为$n$的序列$a_i$,求$\sum\limits_{p} \frac{1}{a_{p_1}\times (a_{p_1}\times a_{p_2})\times \cdots \times (a_{p_1}\times \cdots \times a_{p_n})} 阅读全文
posted @ 2020-11-12 16:00 我亦如此向往 阅读(158) 评论(0) 推荐(0) 编辑