The CSE department of IIIT Hyderabad is one of the best in the country. IIIT Hyderabad as we have seen over the years..ends up getting the top ranked students of JEE-Mains
Now if you see the trend..in general IIIT Hyderabad CSE closes at around 1200-1300 AIR
but since you're asking for the worst condition.. I would say AIR 1500 is the maximum you can hope for.
All the best
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