What problem does it solve? Technical interview preparation often involves abstract, disconnected problems with no guidance on recognizing underlying patterns, leaving candidates unprepared for real coding interviews. ## Core Features & Use Cases - Interactive Code Playgrounds: Generates browser-based HTML coding environments with test execution, progressive hints, and solution reveal for hands-on practice. - Pattern-Based Curriculum: Teaches 20 essential coding patterns (two pointers, sliding window, BFS/DFS, dynamic programming, heaps, tries) mapped to real product scenarios from companies like Instagram, Uber, and Netflix. - Multi-Language Support: Provides implementations and practice in Python, TypeScript, Kotlin, and Swift with progressive difficulty from Easy to Expert. - Use Case: Ask for a medium-difficulty graph problem framed as a LinkedIn connection-finder, and receive a complete interactive playground with test cases, hints, and a BFS solution template. ## Quick Start Ask for an interactive coding playground on a specific pattern, difficulty level, or real product scenario to start practicing.