摘要: ## Problem[NOIp2018Day1T2 P5020 货币系统](https://www.luogu.org/problem/P5020)## Proposition定义$ n$元集合$A=\left\{ a_1,a_2,...,a_n \right\}$ 为 $\left( n,a \r 阅读全文
posted @ 2020-06-27 14:33 te5555 阅读(41) 评论(0) 推荐(0)