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Can you Guess ?

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No problem statement. Find the logic from the given sample input/output. And answer Q queries. Constraints : 1 <= Value <= 100000 1<=nunber of query<=10000 SAMPLE INPUT   8 10 30 45 9 69 77 127 150 SAMPLE OUTPUT   8 42 33 4 27 19 1 222
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GCD

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Level  EASY Calculate and return GCD of two given numbers x and y. Numbers are within range of Integer. Input format : x and y (separated by space) Output format : GCD of x and y Sample Input 1: 20 5 Sample Output 1: 5 Sample Input 2: 96 14 Sample Output 2: 2
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Reverse Level Order Traversal

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Level MEDIUM Given a binary tree.Traverse the tree in the manner of reverse level order Example: 5 / \ 6 2 / \ 2 3 / \ 9 7 Reverse level order traversal for this tree is: 7 9 3 2 2 6 5 Input format : Line 1 : Elements in level order form (separated by space) (If any node does not have left or right child, take -1 in its place) Output Format : Print Reverse level order traversal Constraints : 1 <= N <= 10^5 Input: 5 6 2 2 3 -1 -1 9 7 -1 -1 -1 -1 Output : 7 9 3 2 2 6 5
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B. Restore the Permutation by Merger

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B. Restore the Permutation by Merger time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output A permutation of length n is a sequence of integers from 1 to n of length n containing each number exactly once. For example, [1], [4,3,5,1,2], [3,2,1] are permutations, and [1,1], [0,1], [2,2,1,4] are not. There was a permutation p[1…n]. It was merged with itself. In other words, let's take two instances of p and insert elements of the second p into the first maintaining relative order of elements. The result is a sequence of the length 2n. For example, if p=[3,1,2] some possible results are: [3,1,2,3,1,2], [3,3,1,1,2,2], [3,1,3,1,2,2]. The following sequences are not possible results of a merging: [1,3,2,1,2,3], [3,1,2,3,2,1], [3,3,1,2,2,1]. For example, if p=[2,1] the possible results are: [2,2,1,1], [2,1,2,1]. The following sequences are not possible results of a merging: [1,1,2,2], [2,1,1,2], [1,2,2,1]. Your task is to restore t...
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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 😀, Sorry😅 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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Regex 101: An Introduction to Regular Expressions for Developers

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Regular expressions (regex) are a powerful tool for searching and manipulating text. They allow you to describe patterns of characters that you want to match, rather than specifying every possible combination of characters. In this blog, we will go over some common regex operations and provide examples for each one. Matching a literal string: regex: hello will match the string "hello". Matching any character: regex: . will match any single character. Matching a set of characters: regex: [aeiou] will match any single vowel. Matching a range of characters: regex: [a-z] will match any single lowercase letter. Matching a negated set of characters: regex: [^aeiou] will match any single non-vowel character. Matching zero or one occurrence: regex: a? will match either the string "a" or an empty string. Matching zero or more occurrences: regex: a* will match any string that contains zero or more "a" characters. Matching one or more occurrences: regex: a+ will matc...
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