diff --git a/courses/free-courses-hi.md b/courses/free-courses-hi.md
index 0b23fbd18..a657ad0b5 100644
--- a/courses/free-courses-hi.md
+++ b/courses/free-courses-hi.md
@@ -1,7 +1,8 @@
 ### Index
 
-* [Android](#android)
-* [C](#c)
+* [Algorithms](#algo)
+* [Android](#Android)
+* [C](#C)
 * [C++](#cpp)
 * [Data Structures](#data-structures)
 * [DevOps](#devops)
@@ -20,6 +21,19 @@
   * [Ruby on Rails](#ruby-on-rails)
 
 
+### Algorithms
+
+* [Binary Search | Interview Questions | Coding | Tutorials | Algorithm](https://www.youtube.com/playlist?list=PL_z_8CaSLPWeYfhtuKHj-9MpYb6XQJ_f2) - Aditya Verma
+* [Binary Trees - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiHYxUk8dSu2_G7MR1PaGXN4) - Pepcoding
+* [Dynamic Programming Playlist | Coding | Interview Questions | Tutorials | Algorithm](https://www.youtube.com/playlist?list=PL_z_8CaSLPWekqhdCPmFohncHwz8TY2Go) - Aditya Verma
+* [Generic Trees - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiEmjuIVDrwR9h5i9TT2CEU_) - Pepcoding
+* [Graphs - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiHfqDcLZMcO9SsUDY4S3a-v) - Pepcoding
+* [Recursion & Backtracking - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiFxaBahjslhBD1LiJAV7nKs) - Pepcoding
+* [Recursion & Backtracking - Level 2](https://www.youtube.com/playlist?list=PL-Jc9J83PIiHO9SQ6lxGuDsZNt2mkHEn0) - Pepcoding
+* [Recursion Playlist | Coding | Interview Questions | Algorithm | Tutorials](https://www.youtube.com/playlist?list=PL_z_8CaSLPWeT1ffjiImo0sYTcnLzo-wY) - Aditya Verma
+* [Time and Space - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiFc7hJ5eeCb579PS8p-en4f) - Pepcoding
+
+
 ### Android
 
 * [Android Development Tutorial for Beginners](https://www.youtube.com/playlist?list=PLUcsbZa0qzu3Mri2tL1FzZy-5SX75UJfb) - Anuj Bhaiya
@@ -34,7 +48,7 @@
 * [C Language Tutorials In Hindi](https://www.youtube.com/playlist?list=PLu0W_9lII9aiXlHcLx-mDH1Qul38wD3aR) - CodeWithHarry
 
 
-<h3 id="cpp">C++</h3>
+### C++
 
 * [C++ Full Course | C++ Tutorial \| Data Structures & Algorithms](https://www.youtube.com/playlist?list=PLfqMhTWNBTe0b2nM6JHVCnAkhQRGiZMSJ) - Apna College
 * [C++ Programming in Hindi](https://www.youtube.com/playlist?list=PLDA2q3s0-n15yszaZ2yRKEoxY-WWkuAt4) - Sumit Bisht (Edutainment 1.0)
@@ -44,13 +58,17 @@
 
 ### Data Structures
 
+* [2-D Arrays - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiFkOETg2Ybq-FMuJjkZSGeH) - Pepcoding
 * [All Data Structure Concepts \| Hindi](https://www.youtube.com/playlist?list=PLsFNQxKNzefJNztGGoQC-59UhSwIaiIW3) - Saurabh Shukla
 * [All Sorting algorithms and Programs \| Hindi](https://www.youtube.com/playlist?list=PLsFNQxKNzefJU-Sj__mljvrmJHZVKWbEm) - Saurabh Shukla
 * [C++ Full Course | C++ Tutorial | Data Structures & Algorithms](https://www.youtube.com/playlist?list=PLfqMhTWNBTe0b2nM6JHVCnAkhQRGiZMSJ) - Apna College
 * [Data Structure Programs \| Hindi](https://www.youtube.com/playlist?list=PLsFNQxKNzefK_DAUwnQwBizOmcY7aDLoY) - Saurabh Shukla
 * [Data Structures and Algorithms Course in Hindi](https://www.youtube.com/playlist?list=PLu0W_9lII9ahIappRPN0MCAgtOu3lQjQi) - CodeWithHarry
 * [Dynamic Programming Playlist](https://www.youtube.com/playlist?list=PL_z_8CaSLPWekqhdCPmFohncHwz8TY2Go) - Aditya Verma
+* [Functions and Arrays - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiHOV7lm2uSw4ZiVsIRsGS6r) - Pepcoding
 * [Java + Data Structures + Algorithms](https://www.youtube.com/playlist?list=PLKKfKV1b9e8ps6dD3QA5KFfHdiWj9cB1s) - Apni Kaksha
+* [Linked Lists - Level 1](https://www.youtube.com/playlist?list=PL-Jc9J83PIiF5VZmktfqW6WVU1pxBF6l_) - Pepcoding
+* [Stack Playlist | Interview Questions | Coding | Tutorials | Data Structures](https://www.youtube.com/playlist?list=PL_z_8CaSLPWdeOezg68SKkeLN4-T_jNHd) - Aditya Verma
 
 
 ### DevOps