摘要: 题目链接:https://www.luogu.com.cn/problem/AT2442 或 https://atcoder.jp/contests/joi2017ho/tasks/joi2017ho_a 差分的博客:https://www.luogu.com.cn/blog/RPdreamer/c 阅读全文
posted @ 2020-05-30 18:20 coastal_taipan 阅读(202) 评论(0) 推荐(0)