Update free-courses-en.md (#9012)

* Update free-courses-en.md

* Update courses/free-courses-en.md

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

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

courses/free-courses-en.md

@@ -135,6 +135,7 @@
 * [Binary Trees - by LoveBabbar](https://youtube.com/playlist?list=PLDzeHZWIZsTo87y1ytEAqp7wYlEP3nner) - CodeHelp - by Babbar
 * [C Programming & Data Structures](https://youtube.com/playlist?list=PLBlnK6fEyqRhX6r2uhhlubuF5QextdCSM) - Neso Academy
 * [Complete C++ Placement DSA Course](https://www.youtube.com/playlist?list=PLDzeHZWIZsTryvtXdMr6rPh4IDexB5NIA) - CodeHelp - by Babbar
+* [Computer Sc - Programming and Data Structure](https://www.youtube.com/playlist?list=PLD9781AC5EBC9FA16) - P.P. Chakraborty
 * [Data Structure and Algorithm](https://www.youtube.com/playlist?list=PLLvKknWU7N4y_eGpQdg1Y-hORO7cxtoLU) - Lalit Vashistha
 * [Data Structures](https://www.youtube.com/playlist?list=PL2_aWCzGMAwI3W_JlcBbtYTwiQSsOTa6P) - mycodeschool
 * [Data Structures](https://stepik.org/course/579/syllabus) - Niema Moshiri, Liz Izhikevich (Stepik)