After getting AC after 13 Time Limit Exceeded verdicts on a geometry problem, Kuroni went to an Italian restaurant to celebrate this holy achievement. Unfortunately, the excess sauce disoriented him, and he’s now lost!

The United States of America can be modeled as a tree (why though) with n vertices. The tree is rooted at vertex r, wherein lies Kuroni’s hotel.

Kuroni has a phone app designed to help him in such emergency cases. To use the app, he has to input two vertices u and v, and it’ll return a vertex w, which is the lowest common ancestor of those two vertices.

However, since the phone’s battery has been almost drained out from live-streaming Kuroni’s celebration party, he could only use the app at most ⌊n2⌋ times. After that, the phone would die and there will be nothing left to help our dear friend!

Codeforce-Ozon Tech Challenge 2020-D. Kuroni and the Celebration（交互题+DFS)的更多相关文章

  1. Codeforce-Ozon Tech Challenge 2020-C. Kuroni and Impossible Calculation(鸽笼原理）

    To become the king of Codeforces, Kuroni has to solve the following problem. He is given n numbers a ...

  2. Codeforce-Ozon Tech Challenge 2020-B. Kuroni and Simple Strings（贪心）

    B. Kuroni and Simple Strings time limit per test1 second memory limit per test256 megabytes inputsta ...

  3. Codeforce-Ozon Tech Challenge 2020-A. Kuroni and the Gifts

    the i-th necklace has a brightness ai, where all the ai are pairwise distinct (i.e. all ai are diffe ...

  4. codeforce AIM tech Round 4 div 2 B rectangles

    2017-08-25 15:32:14 writer:pprp 题目: B. Rectangles time limit per test 1 second memory limit per test ...

  5. Codechef May Challenge 2020 Division 1 记录

    目录 Triple Sort Sorting Vases Buying a New String Chef and Bitwise Product Binary Land Not a Real Wor ...

  6. Codechef July Challenge 2020 Division 1 记录

    目录 Missing a Point Chefina and Swaps Doctor Chef Chef and Dragon Dens LCM Constraints Weird Product ...

  7. Codechef June Challenge 2020 Division 1 记录

    目录 The Tom and Jerry Game! Operations on a Tuple The Delicious Cake Convenient Airports Guessing Gam ...

  8. Codeforce#331 (Div. 2) A. Wilbur and Swimming Pool(谨以此题来纪念我的愚蠢)

    C time limit per test 1 second memory limit per test 256 megabytes input standard input output stand ...

  9. Codeforces Round #596 (Div. 2, based on Technocup 2020 Elimination Round 2) C. p-binary 水题

    C. p-binary Vasya will fancy any number as long as it is an integer power of two. Petya, on the othe ...

随机推荐

  1. Spring （六）：整合Mybatis

    本文是按照狂神说的教学视频学习的笔记,强力推荐,教学深入浅出一遍就懂!b站搜索狂神说或点击下面链接 https://space.bilibili.com/95256449?spm_id_from=33 ...

  2. NullPointerException的处理新方式，Java14真的太香了

    在Java语言中,处理空指针往往是一件很头疼的事情,一不小心,说不定就搞出个线上Bug,让你的绩效考核拿到3.25.最近新出的Java14,相信大家都有所耳闻,那么今天就来看看,面对NullPoint ...

  3. python3中的nonlocal 与 global

    nonlocal 与 global nonlocal翻译是非本地,global翻译是全局,它们都是python3的新特性.如果以类C语言的思维去看这2个关键字,很可能觉得它们差不多.但实际上它们很不一 ...

  4. 中阶d03.2 JDBC联合properties使用，通过读取本地配置文件为代码传递参数

    * 使用properties读取本地配置文件为代码传递参数 * url.用户名.密码.驱动地址等配置可以在配置文件中使用 main package zj_1_JDBC.properties; impo ...

  5. ubuntu 虚拟机复制后打开蓝屏解决办法

    sudo apt-get install xserver-xorg-lts-utopic sudo dpkg-reconfigure xserver-xorg-lts-utopic reboot

  6. JAVA开发中相对路径，绝对路径全面总结

    JAVA开发中相对路径,绝对路径全面总结 博客分类: Java综合 JavaJSP应用服务器Servlet网络应用 1.基本概念的理解 绝对路径:绝对路径就是你的主页上的文件或目录在硬盘上真正的路径, ...

  7. [转] Roguelike开发建议

    该文所述的Roguelike为典型的Roguelike游戏,而非带着Roguelike元素的游戏. 以下内容为他在今年Roguelike开发者大会上的发言文字版. 引言 几年前召开的首届Rogueli ...

  8. java接口工厂模式理解

    作为实际java开发经验还不到一年的我,第一次写博客,诚惶诚恐,怕把自己的谬误公之于众,误人子弟,不过转念一想,若是能有同行加以指点评判,将他们的真知灼见描述出来,那这篇文章就算抛转引玉了. 最近在阅 ...

  9. ORCAD常用元件库说明

    以下是ORCAD自带库文件的说明,路径:Cadence\Cadence_SPB_16.6\tools\capture\library 1' AMPLIFIER.OLB共182个零件,存放模拟放大器IC ...

  10. python高级特性之封包与解包

    前言 文的文字及图片来源于网络,仅供学习.交流使用,不具有任何商业用途,版权归原作者所有,如有问题请及时联系我们以作处理. 作者:kwsy PS:如有需要Python学习资料的小伙伴可以加点击下方链接 ...