Hey,

IIIT cut off for CSE was 285 for 1st round of counselling last year and it would fall somewhere near by the same score this year aswell.  And it is 256 was the cut off for the 4th round of the counselling. Hence, you should be somehwere in between the cut offs of the first and the last counselling though cut off may vary in 10-15 marks. Attend all the counselling sessions. Wait till the end. 

Hope this helped. 

Thankyou and keep asking