Leetcode HARD

Arrays are one of the most fundamental data structures in programming. Problems involving arrays often require combining, comparing, or transforming elements in specific ways. In this article, we’ll walk through a problem that revolves around replacing adjacent numbers that are non-coprime with their LCM (Least Common Multiple) . We’ll explain the problem clearly, explore the mathematical concepts involved, show how to approach it, and implement solutions in C++ , JavaScript , and Python . Additionally, we'll explain the time and space complexity in simple terms. ✅ Problem Explanation You are given an array nums with integers. The task is to repeatedly find two adjacent numbers that are non-coprime , replace them with their LCM , and keep doing this until no such pair remains. ➤ What is GCD and LCM? GCD (Greatest Common Divisor): The largest integer that divides both numbers. LCM (Least Common Multiple): The smallest number that both integers can divide in...