https://111qqz.com/en/tags/%E6%A0%91%E5%A5%97%E6%A0%91/Recent content in 树套树 on 111qqz's blogHugo -- gohugo.ioen© 2015-2026 111qqzSun, 04 Sep 2016 13:47:07 +0000https://111qqz.com/en/post/acm-icpc/2016/2016-09-04-cf19d/Sun, 04 Sep 2016 13:47:07 +0000https://111qqz.com/en/post/acm-icpc/2016/2016-09-04-cf19d/<p><a href="http://codeforces.com/problemset/problem/19/D" target="_blank" rel="noreferrer">题目链接</a></p> <p>题意：</p> <blockquote><p>在二维坐标平面内进行_n_ (1 ≤ <em>n</em> ≤ 2·105) 次操作。一共有三种类型操作。</p>