Programmer Group

The page navigation of wordpress classification page is the previous page and the next page by default. Sometimes we want it to display the digital page. How do we operate it? Most of them think that it can be solved by installing a plug-in. As a developer who likes to research, they will naturally implement it in code. Let's take a look at it ...

Luogu Title Page Portal & CodeForces title page portal Given a tree(T=(V,E),|V|=2^n-2,|E|=2^n-3, output all \(x), so that there exists a full binary tree\(T'), delete a son of\(x\) and connect all sons of the son to\(x\\\\\\\\\ Output in ascending order. \(n\le17\). The title does not say which point is the root, that is, each poin ...

brief introduction At present, a connection trace quintuple is the source destination IP, the transport layer protocol, and the source destination port. In multi-tenant environment, the private address network of tenants may overlap. If only one CT is distinguished by these five elements, it can not meet the needs of multi-tenants. So the conce ...

Mutual Exclusive Locks with Shared/Exclusive Access Rights and Upgrade/Downgrade Functions   introduce My goal is to create objects that can act as read/write locking mechanisms. Any thread can lock it for reading, but only one thread can lock it for writing. All other threads will wait until the write thread releases it. Writing threads do ...

EVPN Centralized L3 Gateway--Trans-subnet Message Forwarding spine configuration Interface Configuration sudo ip link add vbdif10 type bridge sudo ip link add vbdif20 type bridge sudo ip link set vbdif10 up sudo ip link set vbdif20 up sudo ip link add vxlan20 type vxlan id 20 local 192.168.59.130 dstport 4789 nolearning sudo ip link add vxlan1 ...

Catalog 3.1 Introduction to Thymeleaf View 3.2 Create SpringBook Project 3.2 Configuration of Thymeleaf 3.3 Writing Demo 3.4 Summary 3.1 Introduction to Thymeleaf View First look at the introduction of the official website: == Thymeleaf is a modern server-side Java template engine fo ...

T1 rainbow subject [Title Description] Mr.Raju and one of his extended families are on vacation. They want to enjoy the scenery in the rainbow, but there are some problems. In their family, if one wants to ride a rainbow, all the people he likes and everyone who likes him must ride on the rainbow together. If a person does not like him and ...

The idea of quick sorting is dichotomy. Ideally, every dichotomy can divide the data sequence equally, so the recursive hierarchy is logN. The worst case is that every dichotomy is divided into 0 and n, which will be infinitely recursive, and eventually stack overflow. Or each time is divided into 1 and n-1, which will recurse n times. If n is ...

This paper mainly records the building process of PX4 environment under Ubuntu 18.04. Because I installed ROS Melodic before installing PX4 environment, and gazebo was installed at the same time when installing ROS, it is impossible to determine whether the subsequent problems were caused by installing ROS first. This paper is divided into the ...

T1 Dynamic Inverse Sequence Pair subject [Title Description] This paper gives a permutation a with length n (the number of N occurs once in each sequence). Exchange two numbers at a time to find the result of the inverse logarithm% 2. Inverse order pair: for two numbers a[i],a[j] (i < j), if a [i] > a [j], then (a[i],a[j]) is an inver ...