2018年6月26日
[树状数组]Meaningful Mean
摘要： 题目描述 You are given an integer sequence of length N, a= {a1,a2,…,aN}, and an integer K.a has N(N+1)⁄2 non-empty contiguous subsequences, {al,al+1,…,ar} 阅读全文
posted @ 2018-06-26 11:37 l..q 阅读(309) 评论(0) 推荐(0)