Resolves review: https://github.com/EbookFoundation/free-programming-books/pull/6073#discussion_r740551665
Closes #6073

* Update a Brasilian competitive programming website.

* Apply suggestions from code review to the file, after the domain was checked.
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NFernando Pimenta <fernandopimenta@tecnosys.com.br>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* geeksforgeeks.com is website, But their problem solving protal is https://practice.geeksforgeeks.org/

* Removed '/' from previous commit

* added a new problem set: acmp

* made a note that acmp is a Russian site

* rename acmp > школа программиста

* Added codechef's problem set

A vast range of unique problems, some of which are also part of Indian ICPC Preliminary Rounds and Regionals Rounds.

* Added codedrills' comeptitive problem set

Codedrills is the platform responsible for Indian ICPC contests currently (from 2020-present). It has many original & pure algorithmic problems.

* Add GNU Emacs refcard to more/free-programming-cheatsheets.md file under ide/editors category

* Add alphabetical order and PDF indication for the adding emacs refcard

* Added PDF indication

* Add HackThisSite in CTF and corrected address spelling

* Removed slash from the end of the URL

* reorganize files

1. make it easier to find files
2. reduce scrolling to get to README on main view of repo

* remove tr.txt again

* Add Google Kickstart to problem-sets-competitive-programming.md

* alphabetize
Co-authored-by: NEric Hellman <eric@hellman.net>

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* alphabetize, remove commentary
Co-authored-by: NEric Hellman <eric@hellman.net>

* Add competitive programming website

* alphabetize
Co-authored-by: NEric Hellman <eric@hellman.net>

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* alphabetize
Co-authored-by: NEric Hellman <eric@hellman.net>

* Add and fix CP resources, check_urls=problem-sets-competitive-programming.md

* Remove tech delight link since not CP

* Update problem-sets-competitive-programming.md

Added Practice Python to Problem Sets

* Update problem-sets-competitive-programming.md

* 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

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

* Update problem-sets-competitive-programming.md

AIcrowd enables data science experts and enthusiasts to collaboratively solve real-world problems, through challenges.

* add materials about swift

* fix spaces

* add new material

* fix build

* fix build

* fix build

* fix

* adding machine learning portuguese courses

* adding machine learning portuguese courses

* adding machine learning portuguese courses

* ajust ordered item - lint

* 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

* Added new CP websites

* Added new CP websites

* 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.

* added cp sites

* removed trailing slash from toph url

* -_-

* add refactoring

* add refactoring
Co-authored-by: Nrndd <you@example.com>

* -_-

* -_-

* -_-

*   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

* remove broken links

* remove broken links

* remove broken links

* fix broken links

* fix broken links

* fix broken links

* fix broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* remove broken links

* replace dead link

* 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.