[network flow] maximum flow: algorithm template, bipartite graph matching
Algorithm template
Time complexity of Ek algorithm: O(nm2)O(nm^2)O(nm2)
Give a flow network and maintain the residual network.
while(){
①Find Zengguang road in the current residual network(bfs):f'
②Update residual network:Put the current residual network Gf Residual network updated to new stream G(f+f')
}
① Simple traversal, bfsbfsbfs can b ...
Posted by caraldur on Wed, 25 May 2022 10:15:55 +0300
.net6+fruit+sqlsugar+senparcsdk develop wechat official account series 3: access to official account
1, Access overview
To access wechat public platform development, developers need to follow the following steps:
1. Fill in server configuration
2. Verify the validity of the server address
3. Implement business logic according to interface documents
2, Fill in server configuration
Fill in your own server configuration with wechat official accou ...
Posted by B0b on Wed, 25 May 2022 10:10:59 +0300
Design pattern: adapter
Adapter (adapter mode)
In real life, there are often instances where two objects cannot work together due to incompatible interfaces. At this time, a third party needs to adapt. For example, a Chinese speaker needs an interpreter when talking to an English speaker, a power adapter when using a DC laptop to connect to an AC power supply, a card ...
Posted by Locust on Wed, 25 May 2022 09:43:53 +0300
redis-cluster is built according to wiki learning records, adding and deleting nodes, and failover
Node planning
Three masters and three slaves
master
slave
node-1
192.168.0.142 6379
192.168.0.142 26379
node-2
192.168.0.143 6379
192.168.0.143 26379
node-3
192.168.0.144 6379
192.168.0.144 26379
16379 Messaging port
36379 Messaging port
Directory Planning
installation manual
/usr/local/redis4
config file directory
/u ...
Posted by RTT on Wed, 25 May 2022 09:21:28 +0300
Java Facade
1, Lead to the question of building a home theater:
There are DVD player, projector, automatic screen, surround sound and popcorn machine in the home theater. It is required to complete the function of using the home theater. The process is as follows:
• direct remote control: coordinate the switch of each equipment
• popcorn opener
& ...
Posted by intenseone345 on Wed, 25 May 2022 09:09:47 +0300
You say you want to play crawler, but you say you don't understand Python regular expressions, I believe you, so why don't you come and see?
foreword
A regular expression is a special sequence of characters that can help you easily check whether a string matches a certain pattern.
The re module also provides exactly the same functions as these methods, which take a pattern string as their first argument.
re.match function
re.match attempts to match a pattern from the beginning of th ...
Posted by cahva on Wed, 25 May 2022 09:02:15 +0300
Dynamic watermark design of audio and video RTMP push and GB28181 docking on Android platform
Technical background
With the development of mobile individual soldier, smart vehicle, smart security, smart home, industrial simulation, GB28281 technology docking and other industries, the scene is no longer limited to the collection of video data, coding, packaging and sending or docking to the streaming media server. Most scenes have highe ...
Posted by White_Coffee on Wed, 25 May 2022 08:58:54 +0300
@Usage of Query annotation (Spring Data JPA)
Reference article: http://www.tuicool.com/articles/jQJBNv
1. A simple example of @ Query annotation
@Query(value = "select name,author,price from Book b where b.price>?1 and b.price<?2")
List<Book> findByPriceRange(long price1, long price2);
2. Like expression
@Query(value = "select name,author,price from Book b where b.name ...
Posted by sandthipe on Wed, 25 May 2022 08:55:33 +0300
[2020HDU multi calibration 6: interval dp] fragment numbers
HDU6831 : Fragrant numbers
[difficulty]
3.5/103.5/103.5/10
In fact, the very simple interval dp
But I didn't have time to think about it at that time//
[title]
Let SSS be an infinite string "1145141919" spliced together to become "114514191911451419114514191919..." "11451419114514191145141919 \ cdots" "1145141 ...
Posted by Nile on Wed, 25 May 2022 08:38:36 +0300
Explain the custom functions in Python with the story of "restaurant packaging"
Note: The blogger is not a Python professional programmer. He is 12 years old and Python is less than 1 year old. 😃 Hope to help some Python novices through this column!
Hi~ Hello everyone! As we said in the last blog post, if there are some functions that can only be implemented with tens of thousands of lines without a library, you can only w ...
Posted by dkode on Wed, 25 May 2022 08:36:48 +0300