WELCOME · LESSON 1
Course Introduction
◷ 5 min read▣ Updated September 17, 2026
Welcome to an interactive course designed to help you master Data Structures and Algorithms from scratch.
Interactive visualExplore the fundamentals
Arrays
0
3
1
1
2
9
3
4
4
6
Access any item instantly with its index.
Linked Lists
10
→20
→30
→40
Every node points to the next.
Trees
10╱ ╲
515
Graphs
ABC╲╱
What's inside this course
Build a durable problem-solving foundation through guided visualizations, practical patterns, and short coding challenges that make each idea stick.
✓A structured roadmap
✓Interactive algorithm traces
✓Problem-solving patterns
✓Chapter quizzes and practice