Fixed the authenticity of 52 Programming Problems by Tamim Shahriar Subeen (#11215)

* Update free-programming-books-bn.md

Added 52 programming problems by Tamim Shahriar Subeen

* Update free-programming-books-bn.md

updated 52 Programming Problems by Tamim Shahriar Subeen

* Update free-programming-books-bn.md

Added 52 Programming Problems by Tamim Shariar Subeen

* Update books/free-programming-books-bn.md

Co-authored-by: Eric Hellman <eric@hellman.net>

---------

Co-authored-by: Eric Hellman <eric@hellman.net>

books/free-programming-books-bn.md

@@ -64,6 +64,11 @@
 * [SL3 Framework - Code For Brain](https://web.archive.org/web/20201024204437/https://sl3.app) - Stack Learners *(:card_file_box: archived)*
 
 
+### Problem Sets
+
+* [৫২ টি প্রোগ্রামিং সমস্যা](http://cpbook.subeen.com/p/blog-page_11.html) - Tamim Shahriar Subeen (HTML)
+
+
 ### Python
 
 * [পাইথন প্রোগ্রামিং বই](http://pybook.subeen.com) - Tamim Shahriar Subeen