Update problem-sets-competitive-programming.md

[Sanober494]

Add GeeksforGeeks

What does this PR do?

Add resource(s) | Remove resource(s) | Add info | Improve repo
Adds resource

For resources

Description

Have included GeeksforGeeks website,

Why is this valuable (or not)?

Extremely, since it is a very popular website among developers.

How do we know it's really free?

It has tons of free materials to look into and study from.

For book lists, is it a book? For course lists, is it a course? etc.

It has documentations, practice problems and many more.

Checklist:

• Read our contributing guidelines.
• Search for duplicates.
• Include author(s) and platform where appropriate.
• Put lists in alphabetical order, correct spacing.
• Add needed indications (PDF, access notes, under construction).
• Used an informative name for this pull request.

Follow-up

• Check the status of GitHub Actions and resolve any reported warnings!

[github-actions]

Linter failed, fix the error(s):

free-programming-books/more/problem-sets-competitive-programming.md
36:3-36:50  warning  Remove trailing slash (https://www.geeksforgeeks.org)  no-url-trailing-slash  remark-lint

[eshellman]

should this replace the listing under "Problem Sets"? We don't like duplicative links.

[Sanober494]

should this replace the listing under "Problem Sets"? We don't like duplicative links.

Yes

[3R1Dev]

GeeksforGeeks appears to have replaced the practice with courses which is the old link in the "Problem Sets". They do have community problems section to solve and that can be found here: https://www.geeksforgeeks.org/explore

The courses they offer are not free, but the community problems do appear to be free after creating an account with them.

@Sanober494 the link you added is just the landing page, if @eshellman is okay with the link I suggested you can use https://www.geeksforgeeks.org/explore instead of the one you used and then you can complete your pull request.

[github-actions]

This Pull Request has been automatically marked as stale because it has not had recent activity during last 60 days 😴

It will be closed in 30 days if no further activity occurs. To unstale this PR, draft it, remove stale label, comment with a detailed explanation or push more commits.

There can be many reasons why some specific PR has no activity. The most probable cause is lack of time, not lack of interest.

Thank you for your patience ❤️

[github-actions]

This Pull Request has been automatically closed because it has been inactive during the last 30 days since being marked as stale.

As author or maintainer, it can always be reopened if you see that carry on been useful.

Anyway, thank you for your interest in contribute ❤️