摘要: 6990: Sequence II 题目描述 We define an element ai in a sequence "good", if and only if there exists a j(1≤ j < i) such that aj < ai.Given a permutation p 阅读全文
posted @ 2018-05-23 20:18 lglh 阅读(165) 评论(0) 推荐(0) 编辑