摘要: 牛客一 J题 树状数组 题目描述 Given a sequence of integers a1, a2, ..., an and q pairs of integers (l1, r1), (l2, r2), ..., (lq, rq), find count(l1, r1), count(l2, 阅读全文
posted @ 2018-07-25 00:51 house_cat 阅读(201) 评论(0) 推荐(0) 编辑