The chances are very low but not zero. Like every engineering college there is a huge crowd opting for CS as a result initially it has the highest cutoff i.e. around 240–250

However after subsequent rounds this cutoff begins to decrease and eventually reaches around 150 in the last rounds.

Now for the year 2018 , the exam was tough and the cut off's have gone down, so it likely possible that the cutoff for admission will also go down. There is a change that you may get CS in third round itself.