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[NOI2006] network charge
An interesting question for thieves. Think about converting the cost into something. Watch If we define the state of leaf node ,}, the state of non le...
Travel by one (Dijkstra)
Problem Description Although Caoer is a road crazy (i.e. he has been in Hangzhou Electric Power for more than a year, and even lost his way in the ca...
Spring Boot cache technology (ehcache, SpringData Redis)
Spring boot integrates Ehcache Spring boot integrates spring dataredis I. spring boot integrates Ehcache 1. Import related maven dependencies <pro...
Example code of message board function implemented in PHP
The example of this paper shares the realization idea of php message board for your reference. The specific content is as follows: 1. Create a file na...
Talk about deadlock analyzer of elastic search
order This paper focuses on the deadlock analyzer of elastic search DeadlockAnalyzer elasticsearch-7.0.1/server/src/main/java/org/elasticsearch/monito...
PHP method of generating order number
The first way to generate unique order number in PHP PHP code $str = date('Ymd') . str_pad(mt_rand(1, 99999), 5, '0', STR_PAD_LEFT...
Traversal of P3961 graph in Luogu
Source of topic There are many ways to do this problem. I'll just mention one here It's the Archmage. Reverse edge building can be used, sta...
The principle and code of avoiding domain name link blocked and blocked by wechat
The domain name link is blocked by wechat, that is, it cannot be opened in wechat environment. You need to click the top right corner to select a bro...
Deep optimization of apache working mode, ab stress test, apache directory attribute
ab pressure test Apache has its own stress testing tool ab, which is simple and easy to use. It can simulate various conditions to make a test reques...
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if if conditional statements in Go do not need parentheses. A variable can be declared in conditional statements. Any variable declared here can be us...
Set generate Dump file on C + + Crash
The Dump file is the memory image of the process, which can save the execution state of the program to the Dump file through the debugger. The Dump f...
Mycat distributed database architecture solution -- details of schema.xml
Echo editor, welcome to reprint, reprint please state the source of the article. Welcome to add echo wechat (wechat: t2421499075) for communication an...
Using python to call pinpoint interface to realize pin alarm
Use python to call the pinpoint interface to implement the pin alarm. 1. When the application monitored on the pinpoint is called incorrectly and the...
Python homework 5 - Zhu Mingquan
Exercise 1: read in the file pmi_days.csv, and complete the following operations:1. Count the days corresponding to the quality level, for example:Exc...
Introduction to mybatis Series II - configuration (mybatis source Chapter)
Note: reproduced from Nan Ke Meng In the previous article, "getting started with Mybatis series (I) - Introduction to Mybatis", a Demo was w...
HDU2023 average - biaobiao88
Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=2023 Average performance Problem Description Suppose that there are n (n < = 50) students in ...
A complicated socket program under Windows
In the previous section, I demonstrated the socket program under Linux. In this section, I will take a look at the socket program under Windows. Othe...
How to batch insert data in mysql with php
If I have such a table, I want to insert a lot of data into it 1 CREATE TABLE IF NOT EXISTS `user_info` ( 2 `id` int(11) NOT NULL AUTO_INCREMENT COMME...
Deep analysis of thread pool in java thread series
(it's more convenient to see the source code on the horizontal screen of mobile phone) Note: java source code analysis part is based on java ver...
PHP analyzes the dependency injection function of Laravel framework from another perspective
Fundamentally speaking, dependency injection is not to let an object create a dependency, nor let a factory object create an object, but to turn the r...
Ranking analysis of application access regions
Application access region ranking Topic content: given Nginx AccessLog (multiple files, estimated to be about 66G) for a period of time, find the five...
iOS knowledge combing asynchronous programming - coobjc learning
Asynchronous programming is a hot topic in recent years. Today, we will talk about asynchronous programming and coobjc in iOS platform. First of all, ...
Built in methods for basic data types
Basic data type built-in method I. conversion between base numbers Example ''' Binary to decimal 110 Manual calculation: 1 * (2 * * 2) ...
How does SpringBoot start?
This article is about the spring boot startup process sorted out by looking at the spring boot source code. The overall direction is to start with sim...
Spring cloud responsive microservice series tutorial (Chapter 10): complete code example of responsive RESTful service
This is the tenth chapter of the series of practical spring cloud responsive microservices. This chapter gives a complete code example of responsive R...
The problem of a parseInt function found by javascript random number
A few days ago, I wanted to forge some data and used random numbers. I didn't write it myself, so I searched the Internet and found this article:...
Solution of Mycat distributed database architecture
Echo editor, welcome to reprint, reprint please state the source of the article. Welcome to add echo wechat (wechat: t2421499075) for communication an...
Java GC learning practice
Recently, I often go to the customer's site. If there is a problem on the site, I will send it to the company's leaders (I really don'...
Time tuple and time date in Python
I. time tuple (time.struct_time) Time tuple is an important type in python. Through time tuple, we can get information such as month, day, hour, minut...
java array definition, usage, and array memory analysis
Preface This paper is mainly from the concept of container to the concept of array to the three definitions of array and the analysis of array memory ...