Add books for Algorithms & Data Structures

[colmwoods]

What does this PR do?

✅ Add resource(s)

IMPORTANT

• Read our contributing guidelines.
• Not a revision of a previous PR.

For resources

Description

Adds a new "Data Structures and Algorithms" section under subjects.md, containing three free and verified resources.

Why is this valuable (or not)?

Organizes Data Structures and Algorithms content under the correct category in subjects.md, improving clarity and navigation for learners.

How do we know it's really free?

All resources are publicly accessible from verified sources (GitHub, textbookequity.org, Open Textbook Library).

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

All listed entries are books.

Checklist:

• Search for duplicates.
• Included author(s) and file type (PDF).
• Entries are alphabetized and properly formatted.
• Used an informative PR title.
• Added a meaningful description.

Follow-up

Checked that GitHub Actions pass. Will address any formatting or link issues if flagged.

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Resources Added

• A Common-Sense Guide to Data Structures & Algorithms - Jay Wengrow (PDF)
• Algorithms and Data Structures - Jürg Nievergelt, Klaus Hinrichs (PDF)
• An Open Guide to Data Structures and Algorithms - Paul W. Bible, Lucas Moser (PDF)

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Related Issue

Fixes #12048

[colmwoods]

new pr sorry, closed the other one and updated the latest. Then did DSA changes. moved into subjects.md instead of lang aswell.

merge please, Thanks

[eshellman]

It seem our existing section is "Algorithms & Data Structures"

[github-actions]

Linter failed, fix the error(s):

free-programming-books/books/free-programming-books-subjects.md
97:1-139:181  warning  Alphabetical ordering: swap l.138 and l.137  alphabetize-lists  remark-lint

[colmwoods]

Have a look there now all under 1 DSA category.

Thanks

[colmwoods]

sorry aswell can you add hacktoberfest-accepted label aswell to this pr, so i can get the 6.

Thanks

[eshellman]

no need for special label

[colmwoods]

Is there a way u can do something like combine the old and new pr as closed it by mistake. I had old pr opened in October but new one opened today And won’t count for Hacktoberfest