HDU - 6201 - transaction transaction transaction (longest or expense flow of SPFA)
Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=6201
There is a price for goods in each place. You can buy and sell them in any two places. There is also a toll between the two places. Seek the maximum profit finally obtained.
Idea: the topic requires the maximum profit. We set up a super source point and super exchange ...
Posted by agoni on Mon, 18 Nov 2019 10:24:45 -0800
Swoole learning notes: getting started with Hprose
1. What is RPCRPC is a way of communication between processes, the full name is "remote call procedure".When a client sends a request to the server, it is not sent directly to the target server, but to the RPC Server, which schedules it.RPC provides remote calling methods that are no different from calling local methods.
2. Introduct ...
Posted by Eddie Fisher on Sun, 17 Nov 2019 13:45:17 -0800
Commands out of sync; you can't run this command now
If you use mysqli's query method to get the result, you will get an error: Commands out of sync; you can't run this command now sss
Stored procedure:
CREATE PROCEDURE test1()
begin
drop table if exists tb1;
create table tb1
(
val int not null
)engine = innoDB;
insert into tb1(val) values(1),(2),(3) ...
Posted by shoz on Sun, 17 Nov 2019 12:29:04 -0800
HDU 1255 (line segment tree optimized scan line rectangular intersection)
~by Wjvje 2019-5-3
Title Link: http://acm.hdu.edu.cn/showproblem.php?pid=1255
Title Description:
Area covered by
Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 8647 Accepted Submission(s): 4333
Problem Description
Given some rectangles on a plane, the ar ...
Posted by gilsontech on Sun, 17 Nov 2019 10:05:19 -0800
A JavaScript technology stack for you to understand inheritance and prototype chain
By Jeskson
Source: front end tavern of dada
1
In learning JavaScript, we know that it is a flexible language, with object-oriented, functional style programming mode, object-oriented has two points to remember, three features, six principles.
So what are they? What are the three specific characteristics? Keep in mind three major features: E ...
Posted by suge on Sun, 17 Nov 2019 05:51:33 -0800
Code specification - Phan static analysis
Phan
brief introduction
Phan is a PHP static analyzer that tends to minimize false positives. It tries to prove wrong, not right.
It looks for FAQs and verifies the type compatibility of various operations when type information is available or can be inferred.
Extended installation
ast
windows
mac: pecl install ast
pcntl.so
mac: compili ...
Posted by chelerblondi on Sat, 16 Nov 2019 12:23:49 -0800
The use of Baidu map api in the front end
1. Open the official api page of Baidu map
http://lbsyun.baidu.com/
2. Click the development document
3. Select the corresponding api
4. Click DEMO details
5. Get the source code and copy it to your code
1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta http-equiv="Content-Type" cont ...
Posted by mikesmith76 on Sat, 16 Nov 2019 11:13:52 -0800
PHP Array usage
Catalog
What is array
array operator
basic operation
Create array
Traversing array
Create an array of type K=V
Delete
change
check
each( )
list( )
What is array
Array is one of the data structures, which is widely used in Web scenar ...
Posted by k994519 on Sat, 16 Nov 2019 07:54:31 -0800
ThinkPHP6 Core Analysis: System Services
What are system services?System services are bindings that identify the class used by the program before it is used, so that the container can parse it (via the register method of the service class), initialize some parameters, register routes, etc. (not limited to these operations, but mainly look at the needs of a class before it is used, con ...
Posted by amelhedi on Sat, 16 Nov 2019 00:48:56 -0800
Configure Nginx web page optimization in Linux system
Configure Nginx hidden version number
In the production environment, the version number of Nginx needs to be hidden to avoid the leakage of security vulnerabilities
View method
Use fiddler tool to view Nginx version number in Windows client
Use "curl-i web address" command to view in CentOS system
The method of hiding version ...
Posted by ilovetoast on Fri, 15 Nov 2019 13:34:29 -0800