Resources - Training & Resources

Books

Book	Author	Best for
Competitive Programmer’s Handbook	Antti Laaksonen	Beginners–Intermediate (free PDF)
Guide to Competitive Programming	Antti Laaksonen	Intermediate (expanded version)
Introduction to Algorithms (CLRS)	Cormen et al.	Reference for algorithm theory
Competitive Programming 4	Steven & Felix Halim	Comprehensive CP reference

Online judges

Platform	Best for	Link
Codeforces	Contests, problemset by rating	codeforces.com
AtCoder	High-quality contests	atcoder.jp
CSES	Curated problem set	cses.fi
LeetCode	Interview prep	leetcode.com
SPOJ	Classic problems	spoj.com
UVa	Large archive	onlinejudge.org

Learning resources

Resource	Type	Link
CP-Algorithms	Algorithm encyclopedia	cp-algorithms.com
USACO Guide	Structured curriculum	usaco.guide
Errichto’s YouTube	Video tutorials	YouTube
Colin Galen’s YouTube	Advanced topics	YouTube
Competitive Programming Playlist	Beginner series	YouTube

Tools

Tool	Purpose	Link
CP Editor	Dedicated CP editor	cpeditor.org
Competitive Companion	Auto-parse problems	Browser extension
StopStalk	Track your progress	stopstalk.com
CF Visualizer	Visualize CF stats	cfviz.netlify.app
Vjudge	Multi-judge contests	vjudge.net

C++ reference

Resource	Link
cppreference.com	en.cppreference.com
C++ STL cheatsheet	GitHub

All the books and resources listed here are either free or available through university library access. If you need help accessing any resource, ask in our community group.