These were the codes discussed in the extra NPTEL TA session Problem Solving Through Programming In C (NOC24 CS42).
Video link: https://youtu.be/w9hLdZr9eu8
Please feel free to raise issues if you have any questions.
Entire playlist: https://www.youtube.com/playlist?list=PLJ5C_6qdAvBFzL9su5J-FX8x80BMhkPy1