Master programming by recreating your favorite technologies from scratch.

🔥 Clone and recreate any website as a modern React app in seconds

Performance-portable, length-agnostic SIMD with runtime dispatch

Hit the bongos like Bongo Cat!

C++ library to develop competitive programming problems

Draggable Item

Visualizes user data from codeforces.com using the official API

OI / ACM-ICPC essays and learning materials

🌟 Wiki of OI / ICPC for everyone. （某大型游戏线上攻略，内含炫酷算术魔法）