Hello chaithra,
Based on your rank it is difficult for you to get a seat in IIIT Banglore. The minimum percentile required to get into is 99.08 (for CSE) . If you scored this percentile this makes you safe for seat into IIIT-B. But there are few chances for you, irrespective of the branch. If you really feel IIIT Banglore as your dream college. Then you can attempt an exam separately for admission into it.
I am providing you the link to check the cutoff into Top IIIT's below :
https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits
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