Hello Narendra,
The previous year JEE Advanced cutoff for CSE for IIT Roorkee for ST Category was-
Opening Rank-58
Closing Rank-82
So, you have to achieve more than that.
For more information, please go through the link given below
https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-roorkee
Thanks for query on this platform, you may visit again for further queries.
All the best.