Algorithm Academy

156 interactive lessons across 22 topics. Each lesson includes visual explanations, step-by-step animations, and runnable code in JavaScript & Python.

Arrays & Strings4 topics

Array Operations String Manipulation Matrix Traversal Two-Dimensional Arrays

Sorting8 topics

Bubble Sort Quick Sort Merge Sort Heap Sort Insertion Sort Selection Sort Counting Sort Radix Sort

Searching4 topics

Linear Search Binary Search Depth-First Search Breadth-First Search

Trees5 topics

Binary Search Tree AVL Tree Trie Segment Tree Binary Heap

Graphs7 topics

Dijkstra's Algorithm Bellman-Ford Floyd-Warshall Kruskal's MST Prim's MST Topological Sort Connected Components

Dynamic Programming7 topics

Fibonacci 0/1 Knapsack Longest Common Subsequence Coin Change Edit Distance House Robber Longest Increasing Subsequence

Linked Lists3 topics

Singly Linked List Doubly Linked List Circular Linked List

Stacks & Queues4 topics

Stack Queue Deque Priority Queue

Hash Tables2 topics

Hash Table (Chaining)Hash Table (Open Addressing)

Advanced3 topics

Union-Find Bloom Filter Skip List

Patterns9 topics

Two Pointers Sliding Window Prefix Sum Backtracking Divide and Conquer Greedy Algorithms Monotonic Stack Interval Problems Recursion

Math & Number Theory4 topics

GCD and LCM Modular Arithmetic Combinatorics Sieve of Eratosthenes

Design Patterns23 topics

Coding Principles13 topics

Single Responsibility Open/Closed Principle Liskov Substitution Interface Segregation Dependency Inversion DRY KISS YAGNI Composition over Inheritance Law of Demeter Separation of Concerns Fail Fast Convention over Configuration

OOP8 topics

Classes & Objects Encapsulation Inheritance Polymorphism Abstraction Method Overriding Interfaces & Abstract Classes Association & Composition

Functional Programming8 topics

Pure Functions Immutability Higher-Order Functions Closures Currying Function Composition Map, Filter, Reduce Recursion in FP

Process & Thread7 topics

What is a Process What is a Thread Process vs Thread Process Lifecycle Thread Lifecycle Inter-Process Communication Context Switching

Concurrency10 topics

Mutex & Locks Semaphores Deadlock Race Conditions Producer-Consumer Problem Readers-Writers Problem Thread Pool Async/Await Pattern Event Loop Concurrency vs Parallelism

Bitwise Operations8 topics

AND, OR, XOR, NOT Left Shift & Right Shift Bit Masking Check/Set/Clear/Toggle Bit Count Set Bits Power of Two Check Swap Without Temp Bit Manipulation Tricks

Networking7 topics

OSI Model TCP vs UDP HTTP/HTTPS DNS REST API WebSocket TLS/SSL Handshake

Relational Database7 topics

Tables, Rows & Columns Primary & Foreign Keys SQL Joins Indexing Normalization ACID Properties Transactions

System Design5 topics

URL Shortener Rate Limiter Chat System News Feed Distributed Cache