2020年3月25日
[CF743C] Vladik and fractions
摘要： [toc] Description Vladik and Chloe decided to determine who of them is better at math. Vladik claimed that for any positive integer $n$ he can represe 阅读全文
posted @ 2020-03-25 18:44 OItby 阅读(263) 评论(0) 推荐(0) 编辑