Awesome Competitive Programming

A curated list of awesome Competitive Programming, Algorithm and Data Structure resources.

Created with a view to connecting people to information, this list below contains a complete collection of all the fantastic resources I've collected over the course of my 11-year competitive programming career. I hope you'll find it useful :)

What is competitive programming? - Quora

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List of Lists
Syllabuses
Tutorial Websites
Open Courses
- Open Courses for Algorithms and Data Structures
Books
- Books for Algorithms | Books for Mathematics
Sites for Practice
- Problem Classifiers | Contest Calendars
Camps and Trainings
Sites for Questions
Implementations
Language Specifics
- C/C++ | Java | Miscellaneous
Tools
- IDEs | Personal use | Contest Preparation
Community
- Blogs | Youtube and Livestreams | Quora
Other Awesome Resources
- Articles | FAQs | Awesome Lists | Interview Questions
License

List of Lists

Awesome curated lists classified by topics.

☆	Name	Description
★★★	Good Blog Post Resources about Algorithm and Data Structures - Codeforces	A collection of fantastic tutorial blog posts written by Codeforces users. Some intriguing ones include Palindromic Trees, Policy Based Data Structures, and a lot more.
★★★	All of the good tutorials found on codeforces - Codeforces	Another good collection of tutorial blog posts written by Codeforces users.
★★★	Data Structures and Algorithms - CodeChef Discuss	A very complete list of competitive programming resources. A must-have in your browser bookmark.
★★★	How to prepare for ACM - ICPC? - GeeksforGeeks	A detailed walk-through of the preparations for ACM-ICPC.

Syllabuses

Find out what topics you need to learn.

☆	Name	Description
★★★	IOI Syllabus	A detailed syllabus on which IOI contestants will be tested. This is still somewhat relevant to ACM-ICPC.
★★★	How to prepare for ACM - ICPC? - GeeksforGeeks	A detailed walk-through of the preparations for ACM-ICPC.
★★☆	Programming Camp Syllabus	A list of important topics in competitive programming with exercise problems.
★★☆	Juniors Training Sheet, by Mostafa Saad Ibrahim	~800 ordered problems for newcomers to be good up to Div2-D

Tutorial Websites

Awesome websites with great tutorials.

☆	Name	Description
★★★	Topcoder Data Science Tutorials	A list of tutorials written by respected Topcoder members. Many top programmers started learning data sciences from here.
★★★	E-Maxx (Russian), (English)	A tutorial website widely used and referenced in the Russian-speaking competitive programming community. Most of the articles of the original site have been translated into English, Google Translate works okay for the remaining ones.
★★☆	Algorithms - GeeksforGeeks	A website with a large archive of nicely written articles on different topics. It is a great complimentary resource for algorithm courses.
★★☆	PEGWiki	A website with amazing in-depth wiki-like writeups on many topics. It's far better than those on Wikipedia in my opinion.
★★☆	Notes - HackerEarth	A great crowdsourcing platform for tutorials. Also visit Code Monk.
★★☆	USA Computing Olympiad (USACO)	Contains several training pages on its website which are designed to develop one's skills in programming solutions to difficult and varied algorithmic problems at one's own pace.
★★☆	basecs	A blog with in-depth, illustrated tutorials on basic algorithms and data structures.
★★☆	Competitive Programming - Commonlounge	Short video tutorials for beginner and intermediate concepts. Advanced tutorials selected from the best ones available on various CP blogs.
★☆☆	OLYMPIADS IN INFORMATICS	An international journal focused on the research and practice of professionals who are working in the field of teaching and learning informatics to talented student.
★☆☆	algolist (Russian)	A Russian website devoted to algorithms of all sorts. Some topics listed on this website seems pretty interesting.
★★☆	演算法筆記 (Algorithm Notes) (Chinese)	One of the most popular tutorial websites among the Taiwanese competitive programming community. The maintainer for this website spends immense efforts on researching algorithms.
★★☆	国家集训队论文 1999-2015 (Papers from Chinese IOI training camps) (Chinese)	Papers from the Chinese IOI training camps. It's interesting for the fact that one can tell different regions emphasize different things.
★★★	Mini-Editorials, by Mostafa Saad Ibrahim trainees	Solutions with mini-editorials for many problems, including UVA/SPOJ/IOI/Olympiad problems
★★☆	OI Wiki (Competitive Programming) (Chinese)	OI Wiki is committed to being a free and open continuously updated programming competition (competitive programming) knowledge integration site. This wiki is a sort of companion or guide for the competitive programmer who's trying to learn something

Open Courses

Consider beginning your competitive programming journey with these awesome courses!

☆	Name	Description
★★☆	Code Monk, by HackerEarth	A fantastic step-by-step tutorial on the essential topics in competitive programming.
★★★	Stanford CS 97SI: Introduction to Competitive Programming Contests	Offers comprehensive lecture slides and a short list of exercise problems.
★★☆	How to Win Coding Competitions: Secrets of Champions	A course by ITMO University on competitive coding on edX.
★★☆	Codechef's Indian Programming Camp	Video Lectures from Codechef's Indian Programming Camp 2016. Lectures given by top competitive programmers like Sergey Kulik, Kevin Charles Atienza and Anudeep Nekkanti. Primarily focused on exploring these concepts by applying them to actual competitive contest problems.
★★☆	Reykjavik T-414-ÁFLV: A Competitive Programming Course	An awesome course taught by Bjarki Ágúst Guðmundsson (SuprDewd). These lectures feature neat slides and a nice list of problems to practice.
★★☆	NCTU DCP4631: Problem Solving and Programming Techniques	A course on basic topics featuring good lecture slides.
★☆☆	Materials (English) from Arabic Competitive Programming YouTube Channel	Some materials (slides & source codes) covering a broad range of algorithmic topics by Mostafa Saad Ibrahim.

Open Courses for Algorithms and Data Structures

☆	Name	Description
★★★	prakhar1989/awesome-courses#algorithms	A fantastic list of open courses offered by notable institutions (MIT, Stanford, UC Berkeley ... etc.).
★★★	MIT SMA 5503: Introduction to Algorithms	Lectured by Prof. Charles Leiserson (one of the coauthors of Introduction to Algorithms) and Prof. Erik Demaine (a brilliant professor who has made remarkable breakthroughs in data science), the course offers great materials, accompanied by intuitive and comprehensive analyses.
★★☆	UIUC Algorithm Course	lecture notes, homeworks, exams, and discussion problems covering a broad range of algorithmic topics

Books

A list of recommended books for competitive programming.

☆	Name	Description
★★☆	Competitive Programming, by Steven and Felix Halim	This book contains a collection of relevant data structures, algorithms, and programming tips. It's a well-received book. ... The first edition is free for download (pdf).
★★☆	Programming Challenges: The Programming Contest Training Manual, by Steven Skiena and Miguel Revilla	This book includes more than 100 programming challenges, as well as the theory and key concepts necessary for approaching them. Problems are organized by topic, and supplemented by complete tutorial material.
★★☆	Competitive Programmer's Handbook, by Antti Laaksonen	An introduction to competitive programming for aspiring IOI and ICPC contestants. Free to download (pdf).
★★☆	Algorithmic Thinking: A Problem-Based Introduction, by Daniel Zingaro	A book that teaches data structures and algorithms using competitive programming problems (IOI, USACO, CCC/CCO, etc.).
★★☆	Computational Geometry: Algorithms and Applications, by Mark de Berg, Otfried Cheong, Marc van Kreveld, Mark Overmars	This is a well-written book which covers a broad range of computational geometry problems.
★☆☆	The Hitchhiker’s Guide to the Programming Contests, by Nite Nimajneb	This book is free for download (pdf). This book covers various topics relevant to competitive programming.
★★★	プログラミングコンテストチャレンジブック (Japanese), by 秋葉拓哉, 岩田陽一, 北川宜稔	An absolutely phenomenal book. The contents, organized in a very coherent manner, are nothing short of amazing. ... 培養與鍛鍊程式設計的邏輯腦：世界級程式設計大賽的知識、心得與解題分享 (Chinese Traditional)
★★☆	算法竞赛入门经典 (Chinese), by 刘汝佳	The Art of Algorithms and Programming Contests (English), 打下好基礎：程式設計與演算法競賽入門經典 (Chinese Traditional)
★★☆	算法竞赛入门经典——训练指南 (Chinese), by 刘汝佳, 陈锋	提升程式設計的解題思考力─國際演算法程式設計競賽訓練指南 (Chinese Traditional)
★★★	算法艺术与信息学竞赛 (Chinese), by 刘汝佳, 黄亮	An old-time classic. It's old but the contents in this book are still considered to be very difficult by today's standards.

Books for Algorithms

☆	Name	Description
★★★	Introduction to Algorithms, by Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest and Clifford Stein	Also known as CLRS (taken from name initials), this book is often referred to as the "bible" for algorithms and data structures. It's one of the most popular textbooks for university algorithm courses. This book covered various algorithms and data structures in great detail. The writing is more rigorous and can be difficult to some.
★★☆	Algorithm Design, by Jon Kleinberg and Éva Tardos	This book revolves around techniques for designing algorithms. It's well-organized and written in a clear, understandable language. Each chapter is backed with practical examples and helpful exercises. The chapter on network flow is highly praised by lots. ... The lecture slides that accompany the textbook are available on its official website.
★★☆	The Algorithm Design Manual, by Steven S. Skiena	The book is written in more readable text. Some find it comprehensive than other books. You can also find some good resources (including the author's own video lectures) on its official website.
★★★	Algorithms, by Robert