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[Codeforces1250E] The Coronation The Coronation 又是一道并查集...最近做的并查集咋这么多... 思路 首先,维护元素间关系的题想到并查集. 因为这里涉及到"翻转"操作.所以我们把反转过后的点\(i\)设为\(i'\),令\(i'=i+n\).然后使用拆点并查集来计算. 我们把需要同时满足的条件放入一个并查集.然后对于任意两个串,都有四种情况: 两个串无论转不转都不相似,显然无解,直接输出-1即可. 两个串无论转不转都相似,因为这两个串之…
解题思路 用2-SAT的思路将题目转化为:已知\(n\)个二元组\(<x,y>\),可以算出有多少属于不同二元组的元素\((a,b)\)存在冲突,要在每个二元组\(<x,y>\)中选择选择一个元素,且要尽可能的少选\(y\),问是否可以选取\(n\)个两两不相互矛盾的元素,若可以输出选取方案. 经过简单的推导可以得到,对于\(<x_i,y_i>\)和\(<x_j,y_j>\) 若\(x_ix_j\)(不)冲突,则\(y_iy_j\)(不)冲突 若\(x_iy…
conscious[英][ˈkɒnʃəs][美][ˈkɑnʃəs]consensus[英][kənˈsensəs][美][kənˈsɛnsəs] scious sensuswaterflood; deluge; flood; flowage; Niagara; spill[英][spɪl][美][spɪl]spell[英][spel][美][spɛl] city urban emperemperortemper irritant Some had begun to build adjacent…
最近试了一下Word2Vec, GloVe 以及对应的python版本 gensim word2vec 和 python-glove,就有心在一个更大规模的语料上测试一下,自然而然维基百科的语料进入了视线.维基百科官方提供了一个很好的维基百科数据源:https://dumps.wikimedia.org,可以方便的下载多种语言多种格式的维基百科数据.此前通过gensim的玩过英文的维基百科语料并训练LSI,LDA模型来计算两个文档的相似度,所以想看看gensim有没有提供一种简便的方式来处理维基…
The Sorrows of Young Werther J.W. von Goethe Thomas Carlyle and R.D. Boylan Edited by Nathen HaskellDole PREFACE I have carefully collected whatever I have been able to learnof the story of poor Werther, and here present it to you , knowing thatyou w…
目录 Contest Info Solutions A. Berstagram B. The Feast and the Bus C. Trip to Saint Petersburg E. The Coronation F. Data Center G. Discarding Game H. Happy Birthday J. The Parade L. Divide The Students M. SmartGarden N. Wires Contest Info Practice Link…
先看demo再看例子 <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title></title> </head> <body> <div id="chart" style="width:600px;height:400px;"></d…
// vol 1   could do with sth   rhinoplasty   angst   the wee small hours   familial   Munich   gladiator   platelet   let/get sb off the hook   make the cut   hard up   get by   chuck   cringe   fussy   tandoori   cut one's teeth (on sth)   scoff   s…
Dunstan, Abbot of Glastonbury Abbey, was one of the most sagacious of these monks. He was an ingenious smith, and worked at a forge in a little cell. This cell was made too short to admit of his lying at full length when he went to sleep as if that d…
CHAPTER 13 ENGLAND UNDER RICHARD THE FIRST, CALLED THE LION-HEART In the year of our Lord one thousand one hundred and eighty-nine, [北宋: 960~1127] Richard of the Lion Heart succeeded to the throne of King Henry the Second, whose paternal heart he had…