题意 给\(2n\)个物品,分别有\(a,b\)属性,对于\(i=1...n\),选择\(i\)个\(a\)属性和\(i\)个\(b\)属性,且每个物品只能作为一种属性的贡献,求最小的值. 分析 看了题解补了两天... 应该叫做可反悔的贪心,或者其实就是网络流?不过因为是特殊的图,所以可以用优先队列来优化. 维护四个优先队列,分别是未使用的\(a\)属性,未使用的\(b\)属性,已使用的\(a\)属性转化为\(b\)属性的花费,已使用的\(b\)属性转化为\(a\)属性的花费. 对一般情况,每次…

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Prior to the publication of the IBM technical paper behind what commonly known today as the Doherty Threshold[1] "... it was thought that a relatively slow response, up to two seconds, was acceptable because the person was thinking about the next tas…

A spectre is haunting Europe – the spectre of communism. All the powers of old Europe have entered into a holy alliance to exorcise this spectre: Pope and Tsar, Metternich and Guizot, French Radicals and German police-spies. Where is the party in opp…

ABSTRACT Recent technological advancement have led to a deluge of data from distinctive domains (e.g., health care and scientific sensors, user-generated data, Internet and financial companies, and supply chain systems) over the past two decades. The…

2013年暑期买到这本书,距离其第一版已经有14年之久,而最早发布在互联网上的文章更是早在1997年.在我阅读的时候,很多事迹已经沉积为历史,很多预言已经成为现实.而这本书的意义却丝毫没有因此淡化,反而更加支持了书里的立论. <大教堂与集市>作者 Eric Raymond, 第一次知道此人还是在天津大学的操作系统原理课程上.大教堂与集市,分别代表两种软件开发模式,大教堂代表着封闭的决策权集中的方式,集市代表开放的,平等透明,共享互动的开源软件开发方式. 本篇博文,主要就一些点展开一些讨论,评价…

英语写作中替换掉用到发腻的↓常用词↓,吐血整理2小时~~   动词替换:   1.Improve 提高:   Promote: 促进AC之间的贸易 promote the trade between A and C; He was promoted to senior manager in this company.   Advance: our understanding of human genetics has considerably(非常的,可换做vastly) advanced.  …

http://www.oracle.com/technetwork/java/javase/documentation/index-137868.html This document describes the style guide, tag and image conventions we use in documentation comments for Java programs written at Java Software, Oracle. It does not rehash r…

Season 1, Episode 6: Riots, Drills and the Devil: Part 1 - Diamond: Just a few more rides. 就再多玩几次吧 Oh, great! Great! 噢太棒了! Then you have to wrap it up. wrap: 包,裹 玩好了就该走了 -Kellerman: Oh, Adam's getting bigger, huh? 噢 Adam看上去长大了点 Ten. Hmm 十岁嗯? - Diamon…

Regionals 2013 :: North America - Southeast USA It Takes a Village As a Sociologist, you are studying a certain kingdom. This kingdom has a capitol city, several villages, and roads between them all. Through your sociological studies, you have been a…