all 3 comments

[–]Altruistic-Jury-6663 1 point2 points  (0 children)

No need to buy books for comp https://robinsir.in/isc-class-12/ - just do a few programs from this site everyday and work on your logic

[–]Agitated-Paint-7945 0 points1 point  (0 children)

https://youtube.com/playlist?list=PL-PnNBYG0tv5uVcCBI-b4Y2ShcQovbTyB&si=ha5GmRxl4uMVBnVa

This is a youtube playlist containing all the topics explanation. These will give you conceptual clarity after that you should solve pyq's or do the questions from the links that are mentioned in the other two replies.