Open-source codebase for the world's famous free coding platform, offering complete curricula from beginner to full-stack development.

A comprehensive guide to system design, helping you ace big tech interviews with included flashcards.

This is a comprehensive collection of classic algorithms implemented in Python, suitable for students and job seekers to practice programming basics and prepare for technical interviews, with clear and runnable code.

A complete roadmap for free self-taught computer science education, gathering open course resources from top universities worldwide to help you master computer basics systematically.

This is a curated list of free computer science video courses from top universities globally, saving you search time and leading directly to the knowledge you want, covering basics to advanced topics.