Level 1
Understanding Dynamic Programming: The Smart To-Do List
Discover how dynamic programming works through an engaging shopping list analogy. Learn the power of remembering past work.
Author
Mr. Oz
Duration
5 mins
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Master software development through structured content organized by difficulty levels. From beginner basics to advanced internals.
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Level 2
Understanding Dynamic Programming — Level 2
Memoization, tabulation, common DP patterns, and production-ready implementation strategies.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Dynamic Programming — Level 3
Memory layout, CPU cache performance, collision resolution internals, and when to use DP vs alternatives.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Recursion: The Mirror Room
Discover how recursion works through an engaging mirror room analogy. Learn the elegance of functions that call themselves.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Recursion — Level 2
Implementation details, base cases, recursive cases, and common patterns.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Recursion — Level 3
Call stack internals, tail recursion optimization, and memory considerations.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Arrays vs Strings: The Library Analogy
Learn the difference between arrays and strings through a simple library analogy. Discover how computers organize and manipulate data.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Arrays vs Strings — Level 2
Implementation details, memory layout, mutability, character encoding, and performance considerations.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Arrays vs Strings — Level 3
CPU cache, memory alignment, SIMD instructions, string interning, and hardware-level optimization techniques.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Two Pointers: The Treasure Hunt
Learn how two pointers technique works through an engaging treasure hunt analogy. Discover why tracking two positions simultaneously is often more efficient than one.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Two Pointers — Level 2
Implementation details, opposite vs same direction pointers, common patterns, and code examples.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Two Pointers — Level 3
Advanced optimization, cache considerations, and when to use two pointers vs. alternatives.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Stacks: The Pancake Stack
Learn how stacks work through a delicious pancake stack analogy. Discover why the last one in is the first one out.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Stacks — Level 2
Implementation details, array vs linked list stacks, and common operations.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Stacks — Level 3
Memory layout, call stacks, recursion, and performance considerations.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Tree Traversals: The Library Explorer
Learn how tree traversals work through an engaging library exploration analogy. Discover why the order you visit nodes matters.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Tree Traversals — Level 2
Recursive vs iterative approaches, stack-based implementations, and production-ready code.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Tree Traversals — Level 3
Memory layout, CPU cache performance, recursion stack overhead, and advanced optimization techniques.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Merge Algorithms: The Card Game
Discover how merge algorithms work through an engaging card game analogy. Learn why combining sorted data is different from combining unsorted data.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Merge Algorithms — Level 2
Technical implementation, dummy node pattern, and common pitfalls to avoid when working with merge algorithms.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Merge Algorithms — Level 3
Memory layout, CPU cache performance, SIMD optimizations, and real-world performance benchmarks.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Sliding Window: The Train Window
Discover how sliding window technique works through an engaging train window analogy. Learn why two pointers are better than one for many problems.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Sliding Window — Level 2
Two pointer techniques, fixed vs variable-size windows, and production-ready patterns for common problems.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Sliding Window — Level 3
Memory layout, CPU cache performance, and advanced optimization. When to use sliding window vs. other approaches.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Hash Tables: The Magical Catalog
Discover how hash tables work through an engaging library catalog analogy. Learn why instant lookups make them one of computer science's most powerful tools.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Hash Tables — Level 2
Hash functions, collision resolution strategies, and common operations for production-ready hash tables.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Hash Tables — Level 3
Memory layout, CPU cache performance, and advanced optimization. When to choose hash tables over arrays or trees.
Author
Mr. Oz
Duration
12 mins
Level 2
Understanding Linked Lists — Level 2
Pointer manipulation, traversal algorithms, insertion and deletion operations for production-ready code.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Linked Lists — Level 3
Memory layout, CPU cache performance, and low-level optimization. When to choose linked lists over arrays.
Author
Mr. Oz
Duration
12 mins
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1
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Browse categories and find the topic you want to learn. Each topic is covered in multiple levels.
2
Start at Your Level
Begin with Level 1 for basics, or jump to your current understanding. No prerequisites needed.
3
Level Up
Progress through levels to deepen your understanding. Each level builds on the previous one.