My Bookmarks
Learning & OI
Luogu
Chinese platform for algorithm learning and contests
C++ Reference
Official C++ standard library reference
Matrix67 Blog
Math and algorithm blog
OI Wiki
Open-source OI knowledge base
CS Academy Graph Editor
Online graph drawing tool
Codeforces
International competitive programming platform
AtCoder
Japanese programming contest platform
UVa Online Judge
Classic international OJ system
MXOJ
Online judge for OI students
LibreOJ
Open-source online judge platform
USACO
USA Computing Olympiad
Tools
ChatGPT
OpenAI AI chat assistant
AIchatOS
Online AI chat tool
Desmos Calculator
Online graphing calculator
Baidu Translate
Online translation service
Ludwig.guru
English writing assistant
Whiteboard OCR
Online OCR tool
Vote Creator
Online voting tool
Music Direct Link
Search and play music directly
Z4A Image Hosting
Free image upload and hosting
Imgse Image Hosting
Free public image hosting
