Скачать или смотреть Why Total Sum Matter | Maximum Product of Splitted Binary Tree | LeetCode 1339

In this video, we solve LeetCode 1339. Maximum Product of Splitted Binary Tree using a clear intuition-driven DFS approach.

The key idea is to realize that:
👉 removing one edge splits the tree into two subtrees, and
👉 the product depends only on the sum of one subtree and the remaining sum.

So instead of trying all splits explicitly, we:
1️⃣ Compute the total sum of the tree
2️⃣ Run another DFS to compute every subtree sum
3️⃣ At each split, calculate
subtreeSum × (totalSum − subtreeSum)
and keep the maximum

This transforms the problem into a simple two-pass DFS solution.

This problem is part of today’s LeetCode Daily Problem of the Day (POTD).

🔹 What you’ll learn:
• Why total tree sum is the key insight
• How each edge represents a valid split
• How DFS helps evaluate all possibilities

🔹 Topics:
• Binary Tree
• Depth-First Search (DFS)
• Subtree Sum

Clear problem explanation, intuition-first walkthrough, and clean Java implementation.

Problem link - https://leetcode.com/problems/maximum...

Java Code - https://pastebin.com/ij9TNyhN
Python Code - https://pastebin.com/2J6rn2n1

Time complexity - O(N)
Space Complexity - O(N)

Page Marker Extension - https://chromewebstore.google.com/det...

Video Chapters -
00:00 - Problem Statement
02:04 - Approach
07:28 - Code
12:05 - Time and Space Complexity


Leetcode daily playlist -    • LeetCode Daily Problems  

LeetCode Easy POTD playlist -    • LeetCode Easy  

LeetCode Medium POTD playlist -    • LeetCode Medium  

LeetCode Hard POTD playlist -    • LeetCode Hard  

If you want to practice daily and improve your problem-solving skills, this is the place to follow along.

#leetcode #dsa #tree #dfs #binarytree #leetcodeproblemoftheday #algorithm #java #python #code #leetcodechallenge #codinginterview #problemsolving