Added Courses by Sudhakar Atchala (#8842)

courses/free-courses-en.md

@@ -344,6 +344,7 @@
 
 * [Compiler Design](https://www.youtube.com/playlist?list=PLLvKknWU7N4zpJWLqk7DXK26JwTB-gFmZ) - Lalit Vashistha
 * [Compiler Design](https://youtube.com/playlist?list=PLBlnK6fEyqRjT3oJxFXRgjPNzeS-LFY-q) - Neso Academy
+* [Compiler Design](https://www.youtube.com/playlist?list=PLXj4XH7LcRfC9pGMWuM6UWE3V4YZ9TZzM) - Sudhakar Atchala (YouTube)
 * [Compilers](https://www.youtube.com/playlist?list=PL6KMWPQP_DM97Hh0PYNgJord-sANFTI3i) - Ghassan Shobaki (YouTube)
 * [Stanford's Compilers](https://www.edx.org/course/compilers)
 

courses/free-courses-te.md

@@ -2,6 +2,7 @@
 
 * [C](#c)
 * [C++](#cpp)
+* [Data Structures](#ds)
 * [Flutter](#flutter)
 * [Java](#java)
 * [Javascript](#javascript)
@@ -19,6 +20,11 @@
 * [C++ Language Tutorials](https://www.youtube.com/playlist?list=PLC2mgeYbYNm9keJjsA95jKa4EUVLd7mQP) - Telugu Computer World (YouTube)
 
 
+### <a id="ds"></a>Data Structures
+
+* [Stacks and Queues in Telugu || Data Structures in Telugu](https://www.youtube.com/playlist?list=PLXj4XH7LcRfBJVCGguyIFbyj__hDSSBm9) - Sudhakar Atchala (YouTube)
+
+
 ### Flutter
 
 * [Dart & Flutter Tutorials in Telugu](https://www.youtube.com/playlist?list=PLv_sM9ZH4RUXoDYMCpMwHNHz875lzTRcH) - Kotha Abhishek (Chintu Tutorials)