Programmer Group

Today, I learned tree dp, and found that tree dp is more difficult to get started, so I decided to send a blog about tree dp. I'm sure you all know the concept of tree dp, so we won't talk about it any more. Go straight to the example. 1, General tree DP P1352 dance without boss Title Description A university has N employees, numbered 1- ...

Data Acquisition for Public Comments - Basic Version Popular Reviews is a third-party food-related review website that is very popular with the general public. Therefore, the site's data is also very valuable.Preferential offers, number of evaluations, positive reviews and other data are also very popular with data companies. Today I wrote a s ...

[overview] There are at least three schemes to realize the identity authentication function based on face recognition: 1. Use the cloud services provided by major platforms, and call based on WEB API. API calls are charged per call. 2. Use SDK, embedded in the device. In this case, you need to develop your own hardware, and the SDK needs to be ...

The where clause is used to find records from tables or temporary datasets that meet the specified conditions, and can be used for conditions in select, update, and delete statements. 1, Generate test data Use the following SQL to create the super girl basic information table (t? Girl) and insert some test data. create table T_GIRL ( id ...

docker compose: a tool for docker automatic arrangement Preface In the last two articles, I played with Dockerfile again, mainly building various service images based on Dockerfile. This paper will introduce and demonstrate the concept and use of docker compose, which is an automatic choreographer tool of docker. What is docker compose? Before ...

Cluster construction helps us to understand how the cluster works, so that we can better understand the high availability, replica fault tolerance mechanism and high performance of es. Role assignment in es Master node Parameter: node.master: true Because the real master node is elected by multiple nodes with master node qualification. Therefo ...

Threads, as the smallest dispatching unit in the operating system, generally have multicore processors in the current operating environment. In order to make better use of CPU, master its correct use, and make the program run more efficiently.It is also an extremely important module in Java interviews. Introduction to Threads A program that ...

1, Source code description Freecplus is a C/C + + open source framework under Linux system. Please go to the C language technology network (www.freecplus.net) to download the source code. This paper introduces the method of log file operation in freecplus framework. The declaration file for functions and classes is freecplus / 65124; freecplus ...

My LeetCode: https://leetcode-cn.com/u/ituring/ My LeetCode source code [GitHub]: https://github.com/izhoujie/Algorithmcii LeetCode 200. Number of islands subject Give you a two-dimensional grid consisting of '1' (land) and '0' (water). Please calculate the number of islands in the grid. Islands are always surrounded by water, and each island ...

My LeetCode: https://leetcode-cn.com/u/ituring/ My LeetCode source code [GitHub]: https://github.com/izhoujie/Algorithmcii LeetCode 466. Count the number of duplicates subject The string s is composed of N connected strings S, which is recorded as S = [s,n]. For example, ["abc",3] = "ABC ABC". If we can remove some charact ...