18:35 3.6 Dijkstra Algorithm - Single Source Shortest Path - Greedy Method Abdul Bari
4.6M views · 72.1K likes · 8 years ago
What Is Binary Tree?
Binary Tree Data Structure
A binary tree is a tree where each node has at most two children (left and right). A Binary Search Tree (BST) adds ordering: left child < parent < right child, enabling O(log n) search, insertion, and deletion. Self-balancing BSTs (AVL, Red-Black) maintain O(log n) guarantees.
How Binary Tree Works
BST lookup: search for 7. Start at root (10). 7 < 10, go left (5). 7 > 5, go right (7). Found! Each comparison eliminates half the tree. Balanced trees guarantee O(log n); unbalanced trees degrade to O(n) — a linked list in the worst case.
Key Concepts
- BST Property — Left subtree values < node < right subtree values — enables binary search on tree structure
- Traversals — In-order (sorted output), pre-order (copy tree), post-order (delete tree), level-order (BFS)
- Balanced Trees — AVL and Red-Black trees self-balance after insertions/deletions — guarantee O(log n) height
- Heap — A complete binary tree where parent ≥ children (max-heap) — used in priority queues and heapsort
Learn Binary Tree — Top Videos
18:35 
36:54 But what is quantum computing? (Grover's Algorithm) 3Blue1Brown
3.1M views · 84.5K likes · 10 months ago
48:57 Acing Google Coding Interview as an 18 year old High School Student William Lin (tmwilliamlin168)
2.9M views · 50.1K likes · 5 years ago
8:26 Namaste DSA 🚀 - Zero to Hero course for Data Structures & Algorithm Akshay Saini
2.5M views · 3.1K likes · 9 months ago
Binary Tree Educators
Gate Smashers
@gatesmashers
Data Science
Welcome to Gate Smashers, one of the fastest-growing EdTech communities with 2.6 M+ learners. 🎓 We provide complete lec...
2.6M Subs
2K Videos
13.8K Avg Views
1.58% Engagement
NeetCode
@neetcode
CS
Current NEET and ex-Google SWE, also I love teaching! N.E.E.T. = (Not in education, employment or training) Preparing ...
1.1M Subs
414 Videos
128.4K Avg Views
3.99% Engagement
NeuralNine
@neuralnine
Web Dev
NeuralNine is an educational brand focusing on programming, machine learning and computer science in general! Let's deve...
461K Subs
1K Videos
14.3K Avg Views
4.77% Engagement
Greg Hogg
@greghogg
Data Science
Today, Greg is driven by a single mission: to help engineers master the complex technical skills required to land roles ...
309K Subs
1.3K Videos
9.1K Avg Views
3.31% Engagement
Frequently Asked Questions
When are binary trees used in practice?
Database indexes (B-trees), in-memory sorted data, priority queues (heaps), expression parsing, Huffman encoding, and many interview problems.
Want a structured learning path?
Plan a Binary Tree Lesson →