5 levels · 25 fundamentals · 70 problemsMaster DSA the
Master DSA the
neon-fast way.
A curated path of 70 problems across 5 difficulty tiers, paired with 25 core fundamentals. Write Java & Python directly in your browser.
70
Problems
5
Levels
25
Concepts
5 difficulty tiers
Initiate → Overlord. Each tier sharpens a different muscle.
Run code in-browser
Write Java or Python, hit Run, see verdicts against test cases.
25 fundamentals
Crisp concept cards covering complexity, structures, and patterns.
The Path
Five tiers. One mastery.
Fundamentals
25 concepts that unlock everything.
Analysis
Time Complexity & Big-O
Measure how runtime grows with input size.
Analysis
Space Complexity
Track auxiliary memory used by an algorithm.
Data Structures
Arrays
Contiguous memory, O(1) random access.
Data Structures
Strings
Immutable sequences of characters.
Data Structures
Linked Lists
Nodes connected by pointers.
Data Structures
Stacks (LIFO)
Last in, first out.
Your first problem is one click away.
Pick a level, write code in Java or Python, run it against the test cases.
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