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A. FashionabLee

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A. FashionabLee time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Lee is going to fashionably decorate his house for a party, using some regular convex polygons... Lee thinks a regular   𝑛 n -sided (convex) polygon is   beautiful   if and only if he can rotate it in such a way that at least one of its edges is parallel to the   𝑂 𝑋 O X -axis and at least one of its edges is parallel to the   𝑂 π‘Œ O Y -axis at the same time. Recall that a regular   𝑛 n -sided polygon is a convex polygon with   𝑛 n   vertices such that all the edges and angles are equal. Now he is shopping: the market has   𝑑 t   regular polygons. For each of them print   YES   if it is beautiful and   NO   otherwise. Input The first line contains a single integer   𝑑 t   ( 1 ≤ 𝑑 ≤ 10 4 1 ≤ t ≤ 10 4 ) — the number of polygons in the mar...
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Number of triangles

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You are given a polygon of  N  sides with vertices numbered from  1 ,   2 ,   . . . ,   N . Now, exactly   2  vertices of the polygons are colored black and remaining are colored white. You are required to find the number of triangles denoted by  A  such that: The triangle is formed by joining only the white-colored vertices of the polygon. The triangle shares at least one side with the polygon. Input format The first line contains  t   denoting the number of test cases. Next   t   lines contain three space-separated integers   N ,  B 1 , and  B 2  where  N  is the number of sides in the polygon and  B 1 , B 2 denote the vertices that are colored black. Output format For each test case, print the answer   A  representing the number of triangles that can be formed with the given conditions in the problem statement.  Constraints 1...
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MySQL Multi Source Master Slave Replication using GTID

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We are using GTID-based master-slave replication. In this replication, both master and slave should have the same GTID. This blog post aims to provide a step-by-step guide to help you set up MySQL Replication using GTIDs and help you replicate your MySQL data with ease. Prerequisite Master Source 1 Channel name:  DEVELOPMENT Database: mydb1 Enable Replication For Tables testing1 testing2 testing3 Mysql Server Running: 192.168.0.201:3307 Master Source 2 Channel name:  PRODUCTION Database: mydb1 Enable Replication For Tables testing4 testing5 testing6 Mysql Server Running: 192.168.0.201:3308 Slave Mysql Server Running: 192.168.0.209:3306 Configuration of  masters(192.168.0.201:3307/192.168.0.201:3308) and slave (192.168.0.209:3306) my.cnf config for master (192.168.0.201:3307) my.cnf config for master (192.168.0.201:3308) my.cnf config for slave (192.168.0.209:3306) Steps for taking a dump and restoring it Run the following commands in both masters 192.168.0.201:3307 and 1...
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Setting Up PostgreSQL Logical Replication with Docker Compose

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Hi everyone πŸ˜€, SorryπŸ˜… for not posting any blogs; I was stuck in other work. In the previous post, we saw that we enabled MySQL Replication using GTID . Today, we see how to allow Postgres Logical Replication in our local setup using docker-compose.  Environment Setup We have two PostgreSQL instances configured using Docker Compose: Publisher (postgres-1): The source server where changes are captured. Subscriber (postgres-2): The destination server that receives replicated data. Docker Compose Configuration Publisher (docker-compose.yml) version: '3.8' services: postgres-1: build: ./ container_name: postgres-1 environment: POSTGRES_USER: postgresadmin POSTGRES_PASSWORD: admin123 POSTGRES_DB: postgresdb PGDATA: "/data" volumes: - ./postgres-1/pgdata:/data - ./postgres-1/config:/config - ./postgres-1/archive:/mnt/server/archive ports: - "5000:5432" networks: - custom_network ...
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Access and modify all the resources of our Wiki.js using WikiJS API

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Hi everyone 😎 , Today we are going to see how to access or modify WikiJS resources using WikiJS API. WikiJS exposes GraphQL API to access and modify the stuff according to our requirements. So In this blog post, we going to see  How to set up WikiJS's local environment using docker. How to generate an API token in Wikijs. Using API tokens how to access WikiJS resources and how to modify them. First Local Setup using docker Here I am using docker to set up my local isolated WikiJS environment. Below is my docker-compose.yml file written by WikiJS contributors. To build the WikiJS environment we just need to run the following command  docker-compose up -df  [PATH_OF_DOCKER_COMPOSE_YML_FILE] To check the environment is in a running state run the following command docker ps Second Generate API token After setup our local environment we are ready to create our initial Administrator account in our WikiJS. 1. On the browser type localhost:80 2. Create an Administrator acco...
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