摘要: Problem Description There is a number sequence A1,A2....An,you can select a interval [l,r] or not,all the numbers Ai(l≤i≤r) will become f(Ai).f(x)=(... 阅读全文
posted @ 2015-11-29 10:54 (慎独) 阅读(160) 评论(0) 推荐(0) 编辑