free-programming-books/more/problem-sets-competitive-pr...

### Index

* [Competitive Programming](#competitive-programming)
* [CTF Capture the Flag](#capture-the-flag)
* [Data science](#data-science)
* [Information security](#information-security)
* [Problem Sets](#problem-sets)


### Competitive Programming

* [4Clojure](http://www.4clojure.com)
* [A2 Online Judge](https://a2oj.com)
* [AtCoder](https://atcoder.jp)
* [Binary Search](https://binarysearch.com)
* [Caribbean Online Judge](http://coj.uci.cu)
* [COCI](https://hsin.hr/coci/)
* [Codeabbey](http://www.codeabbey.com)
* [Codechef](https://www.codechef.com/contests)
* [Codecombat](https://codecombat.com)
* [Codeeval](https://www.codeeval.com)
* [CodeFights](https://codefights.com)
* [Codeforces](http://codeforces.com/contests)
* [Codeground](https://www.codeground.org)
* [Coderbyte](https://coderbyte.com)
* [Codewars](http://www.codewars.com)
* [Codingame](https://www.codingame.com/start)
* [DMOJ](https://dmoj.ca)
* [E-olymp](https://www.e-olymp.com/en/)
* [Facebook Hackercup](https://www.facebook.com/hackercup)
* [Google Code Jam](https://codingcompetitions.withgoogle.com/codejam)
* [Google Kickstart](https://codingcompetitions.withgoogle.com/kickstart)
* [HackerEarth](https://www.hackerearth.com)
* [Hackerrank](https://www.hackerrank.com)
* [Internet Problem Solving Contest](http://ipsc.ksp.sk)
* [Just another Golf Coding](http://jagc.org)
* [Kattis](https://open.kattis.com)
* [LeetCode](https://leetcode.com)
* [Microcorruption](https://microcorruption.com/login)
* [oj.uz](https://oj.uz)
* [Sphere Online Judge](http://www.spoj.com/contests)
* [Techgig](https://www.techgig.com)
* [Topcoder](https://www.topcoder.com)
* [Toph](https://toph.co)
* [URI Online Judge](https://www.urionlinejudge.com.br/judge/en/login)


### Capture the flag

* [CTFlearn](https://ctflearn.com) (email adress *requested*)
* [Google Ctf](https://capturetheflag.withgoogle.com) (email adress *requested*)
* [Hacker101](https://ctf.hacker101.com) (email adress *requested*)
* [Hackthebox](https://www.hackthebox.eu) (email adress *requested*)
* [Overthewire Wargames fungame to practice CTF](https://overthewire.org/wargames/bandit)
* [Picoctf](https://picoctf.org/resources) (email adress *requested*)
* [TryHackMe](https://tryhackme.com) (email adress *requested*)


### Data science

* [AIcrowd](https://www.aicrowd.com)
* [CodaLab](https://competitions.codalab.org)
* [CrowdANALYTIX](https://www.crowdanalytix.com/community)
* [DrivenData](https://www.drivendata.org)
* [Kaggle](https://www.kaggle.com)
* [KDD Cup](https://www.kdd.org/kdd2019/kdd-cup)


### Information security

* [ångstromCTF](https://angstromctf.com)
* [CTFtime](https://ctftime.org)
* [Hacker101](https://ctf.hacker101.com)
* [InCTF](https://inctf.in)


### Problem Sets

* [500 Data structures and algorithms interview questions and their solutions in C++](https://www.quora.com/q/techiedelight/500-Data-Structures-and-Algorithms-interview-questions-and-their-solutions)
* [A2 Online Judge](https://a2oj.com/ps)
* [Advent Of Code](http://adventofcode.com)
* [Anarchy Golf](http://golf.shinh.org)
* [CareerCup](http://www.careercup.com)
* [CheckIO](http://www.checkio.org)
* [Codeforces](http://codeforces.com/problemset)
* [Codility](https://codility.com/programmers/)
* [Coding Bat](http://codingbat.com/java)
* [CSES Problem Set](https://cses.fi/problemset/)
* [Exercism](http://exercism.io)
* [Geeks For Geeks](http://www.geeksforgeeks.org)
* [Google Code Jam - Practise](https://code.google.com/codejam/contests.html)
* [Hacker.org](http://www.hacker.org)
* [HackerEarth](https://www.hackerearth.com)
* [HDU Online Judge](http://acm.hdu.edu.cn)
* [Interactive Coding Challenge](https://github.com/donnemartin/interactive-coding-challenges)
* [InterviewBit](https://www.interviewbit.com)
* [Kattis](https://open.kattis.com)
* [Leetcode](https://leetcode.com)
* [Mathproblem of the Month - Bilkent University](http://www.fen.bilkent.edu.tr/~cvmath/prob-month.html)
* [PEG Judge](http://wcipeg.com)
* [PKU Online Judge](http://poj.org)
* [Ponder This!](https://www.research.ibm.com/haifa/ponderthis/index.shtml)
* [Practice Python](https://www.practicepython.org)
* [ProblemBook.NET](https://github.com/AndreyAkinshin/ProblemBook.NET)
* [Project Euler](https://projecteuler.net)
* [Python Practice Projects](http://pythonpracticeprojects.com)
* [Rosalind](http://rosalind.info/problems/locations/)
* [Sphere Online Judge](http://www.spoj.com/problems/classical)
* [TalentBuddy](http://www.talentbuddy.co/blog/)
* [Timus Online Judge](http://acm.timus.ru)
* [URI Online Judge](https://www.urionlinejudge.com.br/judge/login)
* [UVa Online Judge](https://uva.onlinejudge.org/index.php?Itemid=8&option=com_onlinejudge)
Created 'problem-sets-en.md' #1191 Mainly its the base we all could (and in my opinion should) build on. 2014-11-16 20:10:38 +01:00			`### Index`
Formatting all files according to guidelines 2015-11-13 14:25:42 +01:00
Created 'problem-sets-en.md' #1191 Mainly its the base we all could (and in my opinion should) build on. 2014-11-16 20:10:38 +01:00			`* [Competitive Programming](#competitive-programming)`
Good resources to learn capture the flags competitions - Cybersecurity+Linux (#3985) * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity with changes * made changes to ctf resources * made changes to ctf resources * made further changes to previous pr * made final changes * made final changes 2020-10-14 15:57:36 +02:00			`* [CTF Capture the Flag](#capture-the-flag)`
Create data science section and add Kaggle to it. 2016-05-25 12:39:23 +02:00			`* [Data science](#data-science)`
add CTFtime to problem-sets-competitive-programming.md (#3468) * -_- * -_- * -_- 2019-12-11 14:33:50 +01:00			`* [Information security](#information-security)`
Fix formatting 2016-05-27 23:19:21 +02:00			`* [Problem Sets](#problem-sets)`
Created 'problem-sets-en.md' #1191 Mainly its the base we all could (and in my opinion should) build on. 2014-11-16 20:10:38 +01:00

			`### Competitive Programming`
Formatting all files according to guidelines 2015-11-13 14:25:42 +01:00
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [4Clojure](http://www.4clojure.com)`
Modification and New Addition of Links (#2016) * Modification and New Addition of Links Modified some links to reach the specific page and added some more links to programming contest and problem set. * Corrected sequence of links * Ruby Interactive Tutorial Added 2016-08-01 14:53:03 +02:00			`* [A2 Online Judge](https://a2oj.com)`
Added new CP websites (#4025) * Added new CP websites * Added new CP websites 2020-10-13 16:05:42 +02:00			`* [AtCoder](https://atcoder.jp)`
			`* [Binary Search](https://binarysearch.com)`
Caribbean Online Judge added (#2655) 2017-11-25 05:00:17 +01:00			`* [Caribbean Online Judge](http://coj.uci.cu)`
Machine learning courses ptbr (#4108) * adding machine learning portuguese courses * adding machine learning portuguese courses * adding machine learning portuguese courses * ajust ordered item - lint 2020-10-15 03:36:27 +02:00			`* [COCI](https://hsin.hr/coci/)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [Codeabbey](http://www.codeabbey.com)`
Update URLs based on redirects 2015-12-13 18:32:57 +01:00			`* [Codechef](https://www.codechef.com/contests)`
Added Python Books 'Think Complexity & 'How to Make Mistakes in Python' 2017-01-03 18:42:16 +01:00			`* [Codecombat](https://codecombat.com)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [Codeeval](https://www.codeeval.com)`
Added Codefights to problem sets and competitive programming 2016-03-08 19:09:54 +01:00			`* [CodeFights](https://codefights.com)`
Modification and New Addition of Links (#2016) * Modification and New Addition of Links Modified some links to reach the specific page and added some more links to programming contest and problem set. * Corrected sequence of links * Ruby Interactive Tutorial Added 2016-08-01 14:53:03 +02:00			`* [Codeforces](http://codeforces.com/contests)`
Add competitive programming website (#4211) * Add competitive programming website * alphabetize Co-authored-by: Eric Hellman <eric@hellman.net> 2020-11-09 18:23:51 +01:00			`* [Codeground](https://www.codeground.org)`
Remove trailing slashes 2015-12-13 22:07:27 +01:00			`* [Coderbyte](https://coderbyte.com)`
			`* [Codewars](http://www.codewars.com)`
Update URLs based on redirects 2015-12-13 18:32:57 +01:00			`* [Codingame](https://www.codingame.com/start)`
Add competitive programming website (#4211) * Add competitive programming website * alphabetize Co-authored-by: Eric Hellman <eric@hellman.net> 2020-11-09 18:23:51 +01:00			`* [DMOJ](https://dmoj.ca)`
Add problemsets and competitive programming sites (#4075) 2020-10-14 16:18:09 +02:00			`* [E-olymp](https://www.e-olymp.com/en/)`
Created 'problem-sets-en.md' #1191 Mainly its the base we all could (and in my opinion should) build on. 2014-11-16 20:10:38 +01:00			`* [Facebook Hackercup](https://www.facebook.com/hackercup)`
Follow up old PRs (#4008) * Add "What I Wish I Knew When Learning Haskell" Follow up #3173. * Update free-programming-books-zh.md Follow up #3330. * added competitive programming link Follow up #3398. 2020-10-13 15:49:52 +02:00			`* [Google Code Jam](https://codingcompetitions.withgoogle.com/codejam)`
Add Google Kickstart to problem-sets-competitive-programming.md (#4742) * Add Google Kickstart to problem-sets-competitive-programming.md * alphabetize Co-authored-by: Eric Hellman <eric@hellman.net> 2020-11-30 17:02:54 +01:00			`* [Google Kickstart](https://codingcompetitions.withgoogle.com/kickstart)`
added link to HackerEarth (#2174) 2017-01-02 21:12:28 +01:00			`* [HackerEarth](https://www.hackerearth.com)`
Fix formatting 2017-01-02 21:19:33 +01:00			`* [Hackerrank](https://www.hackerrank.com)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [Internet Problem Solving Contest](http://ipsc.ksp.sk)`
			`* [Just another Golf Coding](http://jagc.org)`
added Kattis to competitive programming and problem sets (#2143) 2016-11-03 23:06:02 +01:00			`* [Kattis](https://open.kattis.com)`
Update problem-sets-competitive-programming.md (#2890) * Update problem-sets-competitive-programming.md Added LeetCode platform in Competitive Programming section. * Update problem-sets-competitive-programming.md Added LeetCode platform in Competitive Programming 2018-06-11 05:15:29 +02:00			`* [LeetCode](https://leetcode.com)`
Update URLs based on redirects 2015-12-13 18:32:57 +01:00			`* [Microcorruption](https://microcorruption.com/login)`
Add competitive programming website (#4211) * Add competitive programming website * alphabetize Co-authored-by: Eric Hellman <eric@hellman.net> 2020-11-09 18:23:51 +01:00			`* [oj.uz](https://oj.uz)`
Modification and New Addition of Links (#2016) * Modification and New Addition of Links Modified some links to reach the specific page and added some more links to programming contest and problem set. * Corrected sequence of links * Ruby Interactive Tutorial Added 2016-08-01 14:53:03 +02:00			`* [Sphere Online Judge](http://www.spoj.com/contests)`
Add TechGig, check_urls=problem-sets-competitive-programming.md (#5130) 2020-11-16 00:20:25 +01:00			`* [Techgig](https://www.techgig.com)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [Topcoder](https://www.topcoder.com)`
added cp sites (#3730) * added cp sites * removed trailing slash from toph url 2020-10-01 15:58:06 +02:00			`* [Toph](https://toph.co)`
			`* [URI Online Judge](https://www.urionlinejudge.com.br/judge/en/login)`
Created 'problem-sets-en.md' #1191 Mainly its the base we all could (and in my opinion should) build on. 2014-11-16 20:10:38 +01:00

Good resources to learn capture the flags competitions - Cybersecurity+Linux (#3985) * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity with changes * made changes to ctf resources * made changes to ctf resources * made further changes to previous pr * made final changes * made final changes 2020-10-14 15:57:36 +02:00			`### Capture the flag`

Add ctflearn in Problem Sets (#4578) * add python di prograte course in bahasa * add c# course in bahasa * delete python no playlist course * fixing index c# in course bahasa * add ctflearn in probsets * Remove trailing slash in CTFlearn * reordering menu 2020-10-22 02:27:46 +02:00			`* [CTFlearn](https://ctflearn.com) (email adress requested)`
Good resources to learn capture the flags competitions - Cybersecurity+Linux (#3985) * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity with changes * made changes to ctf resources * made changes to ctf resources * made further changes to previous pr * made final changes * made final changes 2020-10-14 15:57:36 +02:00			`* [Google Ctf](https://capturetheflag.withgoogle.com) (email adress requested)`
Add CTF resource, check_urls=problem-sets-competitive-programming.md (#5133) 2020-11-16 00:35:08 +01:00			`* [Hacker101](https://ctf.hacker101.com) (email adress requested)`
Good resources to learn capture the flags competitions - Cybersecurity+Linux (#3985) * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity * Added resources to learn capture the flags cybersecurity with changes * made changes to ctf resources * made changes to ctf resources * made further changes to previous pr * made final changes * made final changes 2020-10-14 15:57:36 +02:00			`* [Hackthebox](https://www.hackthebox.eu) (email adress requested)`
			`* [Overthewire Wargames fungame to practice CTF](https://overthewire.org/wargames/bandit)`
			`* [Picoctf](https://picoctf.org/resources) (email adress requested)`
			`* [TryHackMe](https://tryhackme.com) (email adress requested)`


Fix formatting 2016-05-27 23:19:21 +02:00			`### Data science`

AIcrowd competition platform for AI & Data Science (#4388) AIcrowd enables data science experts and enthusiasts to collaboratively solve real-world problems, through challenges. 2020-10-18 20:55:25 +02:00			`* [AIcrowd](https://www.aicrowd.com)`
Update problem-sets-competitive-programming.md (#4444) * Update problem-sets-competitive-programming.md * Update problem-sets-competitive-programming.md 2020-10-20 01:42:45 +02:00			`* [CodaLab](https://competitions.codalab.org)`
Update problem-sets-competitive-programming.md (#4346) * Update problem-sets-competitive-programming.md * Update problem-sets-competitive-programming.md * Update problem-sets-competitive-programming.md * alphabetize, remove commentary Co-authored-by: Eric Hellman <eric@hellman.net> 2020-11-12 04:11:15 +01:00			`* [CrowdANALYTIX](https://www.crowdanalytix.com/community)`
Update problem-sets-competitive-programming.md (#4421) * Update problem-sets-competitive-programming.md * Update problem-sets-competitive-programming.md * Update problem-sets-competitive-programming.md 2020-10-19 16:53:23 +02:00			`* [DrivenData](https://www.drivendata.org)`
Fix formatting 2016-05-27 23:19:21 +02:00			`* [Kaggle](https://www.kaggle.com)`
Update problem-sets-competitive-programming.md (#4346) * Update problem-sets-competitive-programming.md * Update problem-sets-competitive-programming.md * Update problem-sets-competitive-programming.md * alphabetize, remove commentary Co-authored-by: Eric Hellman <eric@hellman.net> 2020-11-12 04:11:15 +01:00			`* [KDD Cup](https://www.kdd.org/kdd2019/kdd-cup)`
Fix formatting 2016-05-27 23:19:21 +02:00

add CTFtime to problem-sets-competitive-programming.md (#3468) * -_- * -_- * -_- 2019-12-11 14:33:50 +01:00			`### Information security`

add angstromctf.com (#3582) * -_- * add refactoring * add refactoring Co-authored-by: rndd <you@example.com> 2020-04-16 17:20:44 +02:00			`* [ångstromCTF](https://angstromctf.com)`
add materials about swift (#4106) * add materials about swift * fix spaces * add new material * fix build * fix build * fix build * fix 2020-10-15 20:30:26 +02:00			`* [CTFtime](https://ctftime.org)`
added more links to information security (#3961) * Update problem-sets-competitive-programming.md * Update problem-sets-competitive-programming.md * Update problem-sets-competitive-programming.md * alphabetize Co-authored-by: Eric Hellman <eric@hellman.net> 2020-11-06 19:08:50 +01:00			`* [Hacker101](https://ctf.hacker101.com)`
			`* [InCTF](https://inctf.in)`
add CTFtime to problem-sets-competitive-programming.md (#3468) * -_- * -_- * -_- 2019-12-11 14:33:50 +01:00

Created 'problem-sets-en.md' #1191 Mainly its the base we all could (and in my opinion should) build on. 2014-11-16 20:10:38 +01:00			`### Problem Sets`
Formatting all files according to guidelines 2015-11-13 14:25:42 +01:00
Add and fix CP resources, check_urls=problem-sets-competitive-program… (#5072) * Add and fix CP resources, check_urls=problem-sets-competitive-programming.md * Remove tech delight link since not CP 2020-11-04 20:06:44 +01:00			`* [500 Data structures and algorithms interview questions and their solutions in C++](https://www.quora.com/q/techiedelight/500-Data-Structures-and-Algorithms-interview-questions-and-their-solutions)`
Modification and New Addition of Links (#2016) * Modification and New Addition of Links Modified some links to reach the specific page and added some more links to programming contest and problem set. * Corrected sequence of links * Ruby Interactive Tutorial Added 2016-08-01 14:53:03 +02:00			`* [A2 Online Judge](https://a2oj.com/ps)`
Added advent of code. Closes #1773 2016-01-31 04:20:48 +01:00			`* [Advent Of Code](http://adventofcode.com)`
Corrected alphabetical ordering for advent of code 2016-02-02 07:37:09 +01:00			`* [Anarchy Golf](http://golf.shinh.org)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [CareerCup](http://www.careercup.com)`
			`* [CheckIO](http://www.checkio.org)`
Added Python Books 'Think Complexity & 'How to Make Mistakes in Python' 2017-01-03 18:42:16 +01:00			`* [Codeforces](http://codeforces.com/problemset)`
Removed typo 2015-06-10 16:29:41 +02:00			`* [Codility](https://codility.com/programmers/)`
Created 'problem-sets-en.md' #1191 Mainly its the base we all could (and in my opinion should) build on. 2014-11-16 20:10:38 +01:00			`* [Coding Bat](http://codingbat.com/java)`
Add problemsets and competitive programming sites (#4075) 2020-10-14 16:18:09 +02:00			`* [CSES Problem Set](https://cses.fi/problemset/)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [Exercism](http://exercism.io)`
changed https to http for geeksforgeeks.org link 2016-03-12 17:42:10 +01:00			`* [Geeks For Geeks](http://www.geeksforgeeks.org)`
Created 'problem-sets-en.md' #1191 Mainly its the base we all could (and in my opinion should) build on. 2014-11-16 20:10:38 +01:00			`* [Google Code Jam - Practise](https://code.google.com/codejam/contests.html)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [Hacker.org](http://www.hacker.org)`
			`* [HackerEarth](https://www.hackerearth.com)`
New resources for competitive programming 2016-07-04 12:13:21 +02:00			`* [HDU Online Judge](http://acm.hdu.edu.cn)`
Update problem-sets-competitive-programming.md 2017-04-03 15:50:03 +02:00			`* [Interactive Coding Challenge](https://github.com/donnemartin/interactive-coding-challenges)`
Add InterviewBit to problem sets 2015-12-02 14:53:02 +01:00			`* [InterviewBit](https://www.interviewbit.com)`
added Kattis to competitive programming and problem sets (#2143) 2016-11-03 23:06:02 +01:00			`* [Kattis](https://open.kattis.com)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [Leetcode](https://leetcode.com)`
Created 'problem-sets-en.md' #1191 Mainly its the base we all could (and in my opinion should) build on. 2014-11-16 20:10:38 +01:00			`* [Mathproblem of the Month - Bilkent University](http://www.fen.bilkent.edu.tr/~cvmath/prob-month.html)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [PEG Judge](http://wcipeg.com)`
			`* [PKU Online Judge](http://poj.org)`
Update URLs based on redirects 2015-12-13 18:32:57 +01:00			`* [Ponder This!](https://www.research.ibm.com/haifa/ponderthis/index.shtml)`
Added Problem Set (#4792) * Update problem-sets-competitive-programming.md Added Practice Python to Problem Sets * Update problem-sets-competitive-programming.md 2020-10-28 15:28:44 +01:00			`* [Practice Python](https://www.practicepython.org)`
Fix Broken Links (#2603) * Replace homepage with GitHub repository link problem-sets-competitive-programming.md: Replace homepage link of problembook with github repository link which contains downloadable pdf links. * Remove broken links Remove broken links and update available links from web.archive.org. * Update broken link with updated link. Update the description for the updated link. * Update broken links with links from web.archive.org Remove dead links. * Restore path to original link instead of web.archive.org The link seems to be working fine. It was not loading on my network, probably due to regional restrictions. * Remove github link which is no longer maintained. Github link consisted of list of Big Data resources. The repository has been deleted by the user. Hence deleting the entry. 2017-10-23 15:53:01 +02:00			`* [ProblemBook.NET](https://github.com/AndreyAkinshin/ProblemBook.NET)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [Project Euler](https://projecteuler.net)`
			`* [Python Practice Projects](http://pythonpracticeprojects.com)`
Update problem-sets-competitive-programming.md 2015-01-27 18:00:32 +01:00			`* [Rosalind](http://rosalind.info/problems/locations/)`
Modification and New Addition of Links (#2016) * Modification and New Addition of Links Modified some links to reach the specific page and added some more links to programming contest and problem set. * Corrected sequence of links * Ruby Interactive Tutorial Added 2016-08-01 14:53:03 +02:00			`* [Sphere Online Judge](http://www.spoj.com/problems/classical)`
Update URLs based on redirects 2015-12-13 18:32:57 +01:00			`* [TalentBuddy](http://www.talentbuddy.co/blog/)`
Remove all trailing slashes 2015-11-13 21:52:57 +01:00			`* [Timus Online Judge](http://acm.timus.ru)`
Update problem-sets-competitive-programming.md 2015-01-27 16:57:24 +01:00			`* [URI Online Judge](https://www.urionlinejudge.com.br/judge/login)`
Update URLs based on redirects 2015-12-13 18:32:57 +01:00			`* [UVa Online Judge](https://uva.onlinejudge.org/index.php?Itemid=8&option=com_onlinejudge)`