c++里最快的io方式是什么呢? 详见这里. 同时给出一个比较常用的方式,就是用fread.然后自己解析文本,而不是用cin或者scanf,见这里: //fast io test #include <cstdio> #include <cstdlib> const int MAXS = 30* 1024* 1024; char buf[MAXS]; void io_parse(char *buf, int len = MAXS){ //重点修改此方法,自己解析输入. int i;…

因为4月初要参加微软的online.所以今天把微软的面试题拿出来做了,自己解答了题目.下面附上我的解答代码. -----------16年9月校招:  第一道题:Farthest Point(最远的整数点) 题目: #1237 : Farthest Point 时间限制:5000ms 单点时限:1000ms 内存限制:256MB 描述 Given a circle on a two-dimentional plane. Output the integral point in or on the…

今日遇见一个开超市的朋友,真没想到在高校开超市一个月可以达到月净利润50K,相比起我们程序员的工资,真是不可同日而语,这个世道啊,真是做程序员不如经商开超市, 我们高科技的从业者,真是造原子弹不如卖茶叶蛋. 请见代码详细注释 //  修复涉及后视列表的Win2K兼容性 //  Fixes Win2K compatibility regarding lookaside lists. // #ifndef _WIN2K_COMPAT_SLIST_USAGE // Add content(增加内容)…

最近在做mariadb的性能,感觉io 有瓶颈,就使用fio 来测试一下磁盘.下文为转载文章(温馨提示:此命令很伤硬盘,测试前请备份数据,- -我就写坏了一个.) FIO 是测试IOPS的非常好的工具,用来对硬件进行压力测试和验证,支持13种不同的I/O引擎,包括:sync,mmap, libaio, posixaio, SG v3, splice, null, network, syslet, guasi, solarisaio 等等.fio 官网地址:http://freshmeat.net…

Gunner  Accepts: 391  Submissions: 1397  Time Limit: 8000/4000 MS (Java/Others)  Memory Limit: 65536/65536 K (Java/Others) Problem Description Long long ago, there is a gunner whose name is Jack. He likes to go hunting very much. One day he go to the…

Negative and Positive (NP) Time Limit: 3000/1500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2177    Accepted Submission(s): 556 Problem Description When given an array (a0,a1,a2,⋯an−1) and an integer K, you are…

转载请注明出处: http://www.cnblogs.com/fraud/          ——by fraud Gunner Time Limit: 8000/4000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Problem Description Long long ago, there is a gunner whose name is Jack. He likes to go hunting very…

Problem Description Long long ago, there is a gunner whose name is Jack. He likes to go hunting very much. One day he go to the grove. There are n birds and n trees. The i−thbird stands on the top of the i−th tree. The trees stand in straight line fr…

Gunner II Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1740    Accepted Submission(s): 635 Problem Description Long long ago, there was a gunner whose name is Jack. He likes to go hunting ve…

The Experience of Love Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) [Problem Description] A girl named Gorwin and a boy named Vivin is a couple. They arrived at a country named LOVE. The country consisting of N…

1.0 Overview and history    ------------------------ fio was originally written to save me the hassle of writing special test case programs when I wanted to test a specific workload, either for performance reasons or to find/reproduce a bug. The proc…

原文地址:http://blog.csdn.net/yuesichiu/article/details/8722417 Fio压测工具和io队列深度理解和误区 这个文档是对fio-2.0.9 HOWTO文档的翻译,fio的参数太多了,翻译这个文档时并没有测试每一个参数的功能和使用方法,只有少量参数做了试验,大部分的参数采用的是根据字面翻译或是个人理解的翻译,必然有些出入,先发出来,以后有使用的时候再被充和修改.在另一个文档中会对fio自带的实例进行分析,可能会更为清晰一些. fio这个工具实在太…

Minfilter过滤框架 优势 与传统的Sfilter过滤驱动相比,有这样几个优势 1. Minfilter加载顺序更易控制,Sfilter加载是随意的,也就是说它在IO设备栈上的顺序是根据其创建的顺序决定的,越晚创建的,越排在设备栈的顶部,而Minfilter根据它的一个全局变量--altitude规定了它在设备栈上的顺序 2. 具有可卸载能力,一般的hook或者过滤框架在卸载时可能仍然有程序在访问它们的代码,所以如果在有程序访问其代码,而它又被卸载时容易导致蓝屏,这样就不具备可卸载能力.而…

Swordsman Time Limit: / MS (Java/Others) Memory Limit: / K (Java/Others) Total Submission(s): Accepted Submission(s): Problem Description Lawson ,ai,,ai,,…,ai,k. If v1≥ai, and v2≥ai, and v3≥ai, and … and vk≥ai,k, Lawson can kill the i-th monster (eac…

文件系统除了处理正常的IRP 之外,还要处理所谓的FastIo.FastIo是Cache Manager 调用所引发的一种没有irp 的请求.换句话说,除了正常的Dispatch Functions 之外,你还得为DriverObject 撰写另一组Fast Io Functions.这组函数的指针在driver->FastIoDispatch. I/O管理起在进行I/O操作时,首先查看该设备是否支持fast io.也就是fast io dispach 的哪张表项是否为空,如果不为空,则调用之,…

通过pyqt做了一个大数据最佳实践检查的gui界面 1.首先是需要用到的模块 from PyQt5.QtWidgets import QApplication from PyQt5.QtWidgets import QMainWindow from PyQt5.QtWidgets import QWidget from PyQt5.QtWidgets import QMessageBox from PyQt5.QtGui import QIcon from PyQt5.QtWidgets imp…

题目2 : Professor Q's Software 时间限制:10000ms 单点时限:1000ms 内存限制:256MB 描述 Professor Q develops a new software. The software consists of N modules which are numbered from 1 to N. The i-th module will be started up by signal Si. If signal Si is generated mul…

The Experience of Love Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 645    Accepted Submission(s): 216 Problem Description A girl named Gorwin and a boy named Vivin is a couple. They arrived…

传送门 The Experience of Love Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 221    Accepted Submission(s): 91 Problem Description A girl named Gorwin and a boy named Vivin is a couple. They arriv…

# Python implementation of the MySQL client-server protocol # http://dev.mysql.com/doc/internals/en/client-server-protocol.html # Error codes: # http://dev.mysql.com/doc/refman/5.5/en/error-messages-client.html from __future__ import print_function f…

#include<bits/stdc++.h> using namespace std; #define ll long long #define ull unsigned long long #define all(x) x.begin(), x.end() #define mem(x, y) memset(x, y, sizeof(x)) #define what_is(x) cerr << "Line " << __LINE__ <<…

传送门 题目2 : Professor Q's Software 时间限制:10000ms 单点时限:1000ms 内存限制:256MB 描述 Professor Q develops a new software. The software consists of N modules which are numbered from 1 to N. The i-th module will be started up by signal Si. If signal Si is generated…

Swordsman Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 2587    Accepted Submission(s): 791 Problem Description Lawson is a magic swordsman with k kinds of magic attributes v1,v2,v3,…,vk. No…

 Gunner II Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1724    Accepted Submission(s): 631 Problem Description Long long ago, there was a gunner whose name is Jack. He likes to go hunting…

由于你的驱动将要绑定到文件系统驱动的上边,文件系统除了处理正常的IRP 之外,还要处理所谓的FastIo.FastIo是Cache Manager 调用所引发的一种没有irp 的请求.换句话说,除了正常的Dispatch Functions 之外,你还得为DriverObject 撰写另一组Fast Io Functions.这组函数的指针在driver->FastIoDispatch. 首先需要了解的是:FastIo 是独立于普通的处理IRP 的分发函数之外的另一组接口.但是他们的作用是一样的…

Return value/code Description 0x00030200 STG_S_CONVERTED The underlying file was converted to compound file format. 0x00030201 STG_S_BLOCK The storage operation should block until more data is available. 0x00030202 STG_S_RETRYNOW The storage operatio…

题目链接:HDU 5183 Problem Description When given an array \((a_0,a_1,a_2,⋯a_{n−1})\) and an integer \(K\), you are expected to judge whether there is a pair \((i,j)(0≤i≤j<n)\) which makes that \(NP−sum(i,j)\) equals to \(K\) true. Here \(NP−sum(i,j)=a_i−…

hackme.inndy.tw的一些Writeup(6月3日更新) 原文链接:http://www.cnblogs.com/WangAoBo/p/7706719.html 推荐一下https://hackme.inndy.tw/scoreboard/,上边有一些很好的针对新手的题目,但网上能搜到的Writeup很少,因此开了这篇博文记录一下部分目前解出的题目(主要是pwn和re),以后会跟着解题进度的推进逐步更新,同时遵循inndy师傅的规矩,只放思路,不放flag. zwhubuntu师傅的部…

OneIndex-Serverless 教程:https://zhuanlan.zhihu.com/p/74538287 https://github.com/LiuChangFreeman/OneIndex-Serverless Onelist https://51.ruyo.net/12396.html #利用免费的IBM Cloud Lite部署 https://wangdalao.com/2757.html https://www.moerats.com/archives/1016/ h…

Description 若带点权.边权的树上一对 \((u, v)\) 为 friend,那么需要满足 \(\text{dist}(u, v) \le r_u + r_v\),其中 \(r_x\) 为点 \(x\) 的权,\(\text{dist}(u, v)\) 表示 \(u, v\) 的树上距离,即 \(u, v\) 间的简单路径上的边权和. 一开始树为空,之后有 \(n\) 次加点操作,每次各处该点需要连接的结点.点权以及边权.对于每次加点之后得到的树,你需要输出当前树上 friends…