倍增练习题. 基环树上倍增一下维护维护最小值和权值和,注意循环的时候$j$这维作为状态要放在外层循环,平时在树上做的时候一个一个结点处理并不会错,因为之前访问的结点已经全部处理过了. 时间复杂度$O(nlogk)$. Code: #include <cstdio> #include <cstring> using namespace std; typedef long long ll; ; ; const int inf = 0x3f3f3f3f; int n, to[N][Lg]…

E. Analysis of Pathes in Functional Graph time limit per test 2 seconds memory limit per test 512 megabytes input standard input output standard output You are given a functional graph. It is a directed graph, in which from each vertex goes exactly o…

http://codeforces.com/contest/702 题意:n个点,n条边,每个点出边只有一条,问从每个点出发经过k条边的边权和,以及边权最小值 思路: f[i][j] 第i个点出发,经过2^j条边后的相连点 其余类似 二进制巧妙解决问题应用太广了 // #pragma comment(linker, "/STACK:102c000000,102c000000") #include <iostream> #include <cstdio> #inc…

题目链接 给一个图, 然后给出每条边的权值和一个k值. 让你求出从每个点出发, 走k次能获得的边权的和以及边权的最小值. 用倍增的思想, 求出每个点走一次能到达的点, 权值和以及最小值, 走两次..四次..八次. 这个很容易计算.然后枚举一下所有点就可以了. #include <iostream> #include <vector> #include <cstdio> #include <cstring> #include <algorithm>…

倍增预处理. 先看一下这张图的结构,因为出度都是$1$,所以路径是唯一的,又因为每个点都有出度,所以必然有环,也就是一直可以走下去. 接下来我们需要记录一些值便于询问: 设$t[i][j]$表示从$i$节点出发,走了${2^j}$步之后,到达的节点编号为$t[i][j]$. 设$s[i][j]$表示从$i$节点出发,走了${2^j}$步之后,路径上的权值和为$s[i][j]$. 设$m[i][j]$表示从$i$节点出发,走了${2^j}$步之后,路径上的权值最小值为$m[i][j]$. 像$RM…

Codeforces 题面传送门 & 洛谷题面传送门 首先假设我们已经填好了所有问号处的值怎样判断是否存在一个合法的构造方案,显然对于一种方案能够构造出合法的基环内向森林当且仅当: \(\forall x,(0,x)\) 的个数为 \(x\) 的倍数,否则不能构成若干个长度为 \(x\) 的环. 设 \(mx_y=\max\{x|(x,y)\in S\}\),其中 \(S\) 为所有二元组构成的集合,那么必然有二元组 \((0,y),(1,y),(2,y),\cdots,(mx_y,y)\in…

CF上的3道小题 终于调完了啊.... T1:CF702E Analysis of Pathes in Functional Graph 题意:你获得了一个n个点有向图,每个点只有一条出边.第i个点的出边指向fi,边权为wi.分别求从每个点出发走k步经过的边权和以及最小的边权值. 分析:倍增嘛...f[i][j]表示j走$2^i$步到达哪个点,然后用这个求出h[i][j]表示j走$2^i$步边权最小值,g[i][j]表示j走$2^i$步边权和. 然后把K二进制拆分一下即可. 代码: #inclu…

比赛链接:http://codeforces.com/contest/702 A. Maximum Increase A题求连续最长上升自序列. [暴力题] for一遍,前后比较就行了. #include <algorithm> #include <iostream> #include <cstdlib> #include <cstring> #include <cstdio> #include <vector> #include &…

Source: Connected Brain Figure above: Bullmore E, Sporns O. Complex brain networks: graph theoretical analysis of structural and functional systems.[J]. Nature Reviews Neuroscience, 2009, 10(3):186-198. Graph measures A graph G consisting of a set of…

转载:http://duanple.blog.163.com/blog/static/70971767201281610126277/   作者:Grzegorz Malewicz, Matthew H. Austern .etc.Google Inc 2010-6 原文:http://people.apache.org/~edwardyoon/documents/pregel.pdf 译者:phylips@bmy 2012-09-14 译文:http://duanple.blog.163.co…

[说明:Pregel这篇是发表在2010年的SIGMOD上,Pregel这个名称是为了纪念欧拉,在他提出的格尼斯堡七桥问题中,那些桥所在的河就叫Pregel.最初是为了解决PageRank计算问题,由于MapReduce并不适于这种场景,所以需要发展新的计算模型去完成这项计算任务,在这个过程中逐步提炼出一个通用的图计算框架,并用来解决更多的问题.核心思想源自BSP模型,这个就更早了,是在上世纪80年代由Leslie Valiant(2010年图灵奖得主)提出,之后在1990的Communicat…

Awesome系列的Java资源整理.awesome-java 就是akullpp发起维护的Java资源列表,内容包括:构建工具.数据库.框架.模板.安全.代码分析.日志.第三方库.书籍.Java 站点等等. 经典的工具与库 (Ancients) In existence since the beginning of time and which will continue being used long after the hype has waned. Apache Ant - Build…

Awesome Java A curated list of awesome Java frameworks, libraries and software. Awesome Java Ancients Bean Mapping Build Bytecode Manipulation Cluster Management Code Analysis Code Coverage Compiler-compiler Configuration Constraint Satisfaction Prob…

1. CodePro AnalytixIt’s a great tool (Eclipse plugin) for improving software quality. It has the next key features: Code Analysis, JUnit Test Generation, JUnit Test Editor, Similar Code Analysis, Metrics, Code Coverage and Dependency Analysis.2. PMDI…

备注: 1.先要安装wheel库:pip install wheel 2.下载wheel,切换至下载路径,然后安装:pip install wheel库名.whl Windows Python Extension Packages by Christoph Gohlke, Laboratory for Fluorescence Dynamics, University of California, Irvine. HoloPy, a tool for working with digital h…

Unofficial Windows Binaries for Python Extension Packages by Christoph Gohlke, Laboratory for Fluorescence Dynamics, University of California, Irvine. This page provides 32- and 64-bit Windows binaries of many scientific open-source extension package…

Organization, development and function of complex brain networks The Brain as a Complex System: Using Network Science as a Tool for Understanding the Brain Rubinov M, Sporns O. Complex network measures of brain connectivity: uses and interpretations.…

http://exploredegrees.stanford.edu/coursedescriptions/cs/ CS 101. Introduction to Computing Principles. 3-5 Units. Introduces the essential ideas of computing: data representation, algorithms, programming "code", computer hardware, networking, s…

求[(5+2√6)2^x+1 ] mod p 的值,其中 0 ≤ x < 232 , p 是个质数,p ≤ 46337 .(这里介绍的是一种暴力的做法) (5+2√6)2^n+1 = an + bn·√6 ----©, (5-2√6)2^n+1 = an - bn·√6 ; 所以(5+2√6)2^n+1 + (5-2√6)2^n+1 = 2an ; 因为5-2√6<1 , 所以[(5+2√6)2^x+1 ] = 2an - 1 ; 然后(5+2√6)2^x+1 = (5+2√6) ·(an-1…

# Redis configuration file example # Note on units: when memory size is needed, it is possible to specify # it in the usual form of 1k 5GB 4M and so forth: # 内存大小的配置,下面是内存大小配置的转换方式 # # 1k => 1000 bytes # 1kb => 1024 bytes # 1m => 1000000 bytes # …

This is a guest blog from Robin Moffatt. Robin Moffatt is Head of R&D (Europe) at Rittman Mead, and an Oracle ACE. His particular interests are analytics, systems architecture, administration, and performance optimization. This blog is also posted on…

# Redis configuration file example # Note on units: when memory size is needed, it is possible to specify# it in the usual form of 1k 5GB 4M and so forth:# 内存大小的配置,下面是内存大小配置的转换方式## 1k => 1000 bytes# 1kb => 1024 bytes# 1m => 1000000 bytes# 1mb =&g…

Cows on Parade Farmer John has two types of cows: black Angus and white Jerseys. While marching 19 of their cows to market the other day, John's wife Farmeress Joanne, noticed that all 16 possibilities of four successive black and white cows (e.g., b…

Statistical approaches to randomised controlled trial analysis The statistical approach used in the design and analysis of the vast majority of clinical studies is often referred to as classical or frequentist. Conclusions are made on the results of…

0.资料 几个主要的网站 angr的github:https://github.com/angr angr的document:https://docs.angr.io/ angr的api:https://angr.io/api-doc/ 1.angr安装 我的实验环境是Ubuntu14.04,显示安装依赖: sudo apt-get install python-dev libffi-dev build-essential virtualenv 然后新建一个python虚拟环境,进入angr环境…

Ubuntu16.04安装Redis并配置 2018年05月22日 10:40:35 Hello_刘 阅读数:29146   Ubuntu16.04安装Redis并配置 1):安装: 1:终端命令下载redis-4.0.9.tar.gz包 wget http://download.redis.io/releases/redis-4.0.9.tar.gz包 2:解压 tar xzf redis-4.0.9.tar.gz 3:移动,放到usr/local⽬录下 sudo mv ./redis-4.0…

运行脚本-Run-time Settings之Preferences设置 by:授客 QQ:1033553122 打开Preferences设置对话框,这里提供了对运行时的参数选择设置 Enable Image and Text Check 开启图片和文本检查.允许用户在回放期间通过web_find(文本检测)或web_image_check(图片检测)验证函数执行验证检查.这个选项仅应用于HTML- based模式录制的记录. 注意: 1.虚拟用户带着验证检查运行比不执行检查的用户会消耗更多内…

http://www.statsblogs.com/2014/12/30/machine-learning-books-suggested-by-michael-i-jordan-from-berkeley/ Machine Learning Books Suggested by Michael I. Jordan from Berkeley December 30, 2014 By Honglang Wang (This article was originally published at…

Customer Industry: Commercial off-the-shelf (COTS) application ,, Food Ingredients or Agricultural Supply Chain trading business Possess broad understanding of SAP capabilities and integration – OTSC:  Order & Trade Settlement to Cash [SD/GTS/GTM] -…

打开Preferences设置对话框,这里提供了对运行时的参数选择设置 Enable Image and Text Check 开启图片和文本检查.允许用户在回放期间通过web_find(文本检测)或web_image_check(图片检测)验证函数执行验证检查.这个选项仅应用于HTML- based模式录制的记录. 注意: 1.虚拟用户带着验证检查运行比不执行检查的用户会消耗更多内存. 2.默认不开启.如果有设置检查点,那么必须开启该选项,否则检查点函数设置无效. Generate Web P…