摘要: Codeforces Round #571 (Div. 2) D. Vus the Cossack and Numbers Description Vus the Cossack has nn real numbers aiai. It is known that the sum of all nu 阅读全文
posted @ 2019-07-03 09:38 kaike 阅读(285) 评论(0) 推荐(0) 编辑