Polycarp's problems time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Polycarp is an experienced participant in Codehorses programming contests. Now he wants to become a problemsetter. He se…

题目链接:http://codeforces.com/contest/727/problem/F 题目大意:有n个问题,每个问题有一个价值ai,一开始的心情值为q,每当读到一个问题时,心情值将会加上该问题的价值.问题只能按顺序读.有m个询问,求当q=bi时,至少要删去多少个问题才能使得在任何时候心情值都>=0 参考这篇:http://blog.csdn.net/aufeas/article/details/53031439 解法一: 贪心 分别求出最多删去i个问题需要的初始心情值的最小值f[i]…

Description 有一个长度为 \(n\) 有正负权值的序列,你一开始有一个值,每次到一个权值就加上,最少需要删掉多少数值才能到序列末尾.\(n \leqslant 750,m \leqslant 2 \times 10^5\) Sol DP+二分. 发现这个东西有后效性,就是前面选不选会影响后面的决策,并且权值太大无法记录. 但是我们可以倒着做,因为后面的决策无法影响前面的决策. \(f[i][j]\) 表示到 \(i\) 删掉 \(j\) 个至少需要的初始权值. 因为初始权值非负,所以…

原题题意 给出长度为n的有序数组,m次询问,每次给出一个正整数x.你要删除数组中最少的元素,使得数组中的前缀和+x都为非负整数.允许离线,n≤750,m≤200,000. 原题思路 首先注意到,x能成功通过测试当且仅当前缀和中最小的数≥x. 将询问从大到小排个序,对于一个新的询问,每次尝试从数组中删除最优的一个数,使得成功的机会更大. 何为最优?我们注意到,ai只会对后面的数造成影响.设当前前缀和最小为now,fi为前i个前缀和中最小的数,则答案会增加 max { min { now-ai ,…

Polycarp is practicing his problem solving skill. He has a list of n problems with difficulties a1,a2,-,an, respectively. His plan is to practice for exactly k days. Each day he has to solve at least one problem from his list. Polycarp solves the pro…

本文是Unity官方教程,性能优化系列的第二篇<Diagnosing performance problems using the Profiler window>的简单翻译. 相关文章: Unity性能优化(1)-官方教程The Profiler window翻译 Unity性能优化(2)-官方教程Diagnosing performance problems using the Profiler window翻译 Unity性能优化(3)-官方教程Optimizing garbage co…

      早晨宁波那边的IT人员打电话告知数据库无法访问了.其实我在早晨也发现Ignite监控下的宁波的数据库服务器出现了异常,但是当时正在检查查看其它服务器发过来的各类邮件,还没等到我去确认具体情况,就收到了电话.我首先检查网络是否畅通,结果发现网络没有问题,然后远程登录到该服务器,查看了一下数据库的服务发现其运行正常,但是在本机使用MSSMS管理工具亦无法连接数据库,当下有两种方案:方案一:使用DAC登录数据库,检查具体情况,方案二:直接去查看错误日志,查看具体错误信息.于是为了快点找到原…

Problems (1) 给一棵带边权的树,求遍历这棵树(每个节点至少经过一次)再回到起点的最短路程. 答案是显然的:边权之和的两倍. (2)给一棵带边权的树,求遍历这棵树(每个节点至少经过一次)的最短路程. (3)给一棵带边权的树T(V,  E ),求T的含K个节点的连通子图的边权和的最小值.…

Polycarp is a music editor at the radio station. He received a playlist for tomorrow, that can be represented as a sequence a1, a2, ..., an, where ai is a band, which performs the i-th song. Polycarp likes bands with the numbers from 1 to m, but he d…

Problems with mmm for mysql posted in MySQL by shlomi 原文:http://code.openark.org/blog/mysql/problems-with-mmm-for-mysql 出于兴趣和研究目的翻译了此文,最近也看了大众点评关于后台使用MMM来做高可用的一些信息(貌似2014年开始转用MHA来做HA),想评估下下MMM在实际生产环境当中的可用性. 正文: 我最近在部署MMM for MySQL的时候遭遇到了一些问题,这使我决定不把它…

Reproduce: Ctrl + H, Select "File Search", will encounter eclipse kinds of bug/error alert: problems encountered during text search Reason: It's because Ctrl + H by default will search disk files, and when the disk files get un-sync with eclipse…

在Ubuntu中安装软件的时候经常碰到E: Unable to correct problems, you have held broken packages.的错误,顾名思义是因为某些软件包冲突导致,幸运的话sudo apt-get update && sudo apt-get upgrade 可以解决,但这种情况属于可遇不可求,更多的适合这么做不济于事.这样一来如何彻底解决就成了一个问题,经过多次摸索之后,将可行的解决方法记录如下: 以安装libxml2-dev时错误为例,安装时提示如…

在用apt 安装软件时,有时会用国内的源以加快下载速度. 但是在使用ubuntu 14.04的过程中,这一过程可能会导致错误“Unable to correct problems, you have held broken packages”. 经测试,网上的apt-get install -f, aptitude等都无效.其实只要将源换成官方的源,然后apt-get update, apt-get upgrade即可解决.…

Description Polycarp is a music editor at the radio station. He received a playlist for tomorrow, that can be represented as a sequence a1, a2, ..., an, where ai is a band, which performs the i-th song. Polycarp likes bands with the numbers from 1 to…

以前做过的题目了....补集+DP        Check the difficulty of problems Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 4091   Accepted: 1811 Description Organizing a programming contest is not an easy job. To avoid making the problems too difficult,…

10 Common Problems Causing Group Policy To Not Apply Group Policy is a solid tool and is very stable. Microsoft has made constant improvements to it since Windows 2000. It allows for the configuration and deployment of pretty much anything in your Ac…

C. Polycarp at the Radio time limit per test: 2 seconds memory limit per test: 256 megabytes input: standard input output: standard output Polycarp is a music editor at the radio station. He received a playlist for tomorrow, that can be represented a…

P54A (*) Check whether a given term represents a binary tree Write a predicate istree which returns true if and only if its argument is a list representing a binary tree. Example: (istree (a (b nil nil) nil)) T (istree (a (b nil nil))) NIL (define (i…

L-99: Ninety-Nine Lisp Problems 列表处理类问题的解答,用Scheme实现,首先定义几个在后续解题中用到的公共过程: ; common procedure (define (check-element xs f) (call/cc (lambda (break) (for-each (lambda (x) (if (f x) (break #t))) xs) #f))) (define (foldl f init xs) (define (iter xs acc)…

在android studio或者eclipse中打开layout文件,发现不能预览布局,提示以下错误: Rendering Problems Exception raised during rendering: Unable to find the layout for Action Bar. 解决办法:切换到design视图,选择低一点的api版本即可.…

Rendering Problems No Android SDK found. Please configure an Android SDK.…

activity_main.xml选择Design显示rendering problems no render target selected 在stackOverflow上找到了答案: You need to run the AVD Manager to add a virtual device that matches the target API version your project is set to. Click Tools->Android->AVD Manager. Clic…

We're using HttpWebRequest to hit HTTPS urls, on iOS. In Debug, local builds, etc. everything works fine. The HTTPS urls we're hitting have valid, commercially signed, perfectly normal certificates, everything checks out there. All is well. The app w…

在android studio中打开layout文件,发现不能预览布局,提示以下错误: Rendering Problems Exception raised during rendering: Unable to find the layout for Action Bar. 解决办法:切换到design视图,选择低一点的api版本即可.…

Check the difficulty of problems Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 5830 Accepted: 2542 Description Organizing a programming contest is not an easy job. To avoid making the problems too difficult, the organizer usually expect…

C. Polycarp at the Radio time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Polycarp is a music editor at the radio station. He received a playlist for tomorrow, that can be represented as a…

Check the difficulty of problems Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 5457   Accepted: 2400 Description Organizing a programming contest is not an easy job. To avoid making the problems too difficult, the organizer usually exp…

by Henry Robinson, April 26, 2010 The 'CAP' theorem is a hot topic in the design of distributed data storage systems. However, it's often widely misused. In this post I hope to highlight why the common 'consistency, availability and partition toleran…

前几天发布应用时出现了如下所示的一段错误提示信息: weblogic.descriptor.DescriptorException: VALIDATION PROBLEMS WERE FOUND problem: cvc-enumeration-valid: string value '3.0' is not a valid enumeration value for web-app-versionType in namespace http://java.sun.com/xml/ns/java…

2013-12-04 22:34:26 转自:http://processors.wiki.ti.com/index.php/Debugging_JTAG_Connectivity_Problems Contents [hide] 1 Strategy for debugging JTAG connectivity problems2 Check your hardware JTAG connection 1.1 If using Spectrum Digital emulators 1.2 I…