Sum Root to Leaf Numbers | Binary Tree DFS Explained | LeetCode Interview Problem скачать в хорошем качестве

Sum Root to Leaf Numbers | Binary Tree DFS Explained | LeetCode Interview Problem

In this video, we solve the “Sum Root to Leaf Numbers” problem using Depth-First Search (DFS) on a binary tree. You’ll learn: How to form numbers while traversing from root to leaf Why DFS + backtracking is the most natural approach How to carry the current number efficiently Common mistakes to avoid in recursion Time & space complexity analysis This problem is frequently asked in FAANG interviews and is a great test of: ✔ Recursion ✔ Tree traversal ✔ Problem-solving clarity 📌 Problem Summary: Each root-to-leaf path represents a number. Your task is to calculate the sum of all such numbers formed. 💡 Example: For paths 1 → 2 → 3 and 1 → 2 → 4, the numbers are 123 and 124. Final Answer = 247 📚 Ideal for: Coding interview preparation Data Structures & Algorithms practice LeetCode / Binary Tree mastery 🔔 Like, share, and subscribe for more DSA + Interview Problems explained clearly!