LeetCode 2872 Explained Simply | Maximum Number of K-Divisible Components (Tree DFS Trick) скачать в хорошем качестве

LeetCode 2872 Explained Simply | Maximum Number of K-Divisible Components (Tree DFS Trick)

n this video, I break down LeetCode 2872 – Maximum Number of K-Divisible Components in a simple and intuitive way. This problem looks complex at first because it involves trees, divisibility, and components counting — but once you see the core idea, it becomes surprisingly elegant. What you will learn: ✅ How to use DFS on trees ✅ How to exploit the modulo trick to form valid components ✅ Why post-order traversal is the key ✅ How to identify valid cuts efficiently ✅ Time & space complexity explained clearly Key Insight: If the sum of a subtree is divisible by k, we can cut it as a valid component without affecting the rest of the tree. This video walks you through: Problem intuition Step-by-step algorithm Clean Python solution Example walkthrough If you’re preparing for coding interviews or improving your tree problem skills, this is a must-watch! 👍 Like, comment, and subscribe if this helps you understand tree DFS better!