Hello,

With a JEE Main rank of 140,000, it's unlikely to get a Computer Science seat in top NITs or IITs, but there are still a few options to consider:

1. State Government Colleges: Many state engineering colleges may have seats available for candidates with a higher rank, especially in the later rounds of counseling.

2. Private Engineering Colleges: Consider applying to private institutions with a good reputation in computer science, like BITS, VIT, SRM, or LPU. These colleges often have their own entrance exams, and you may have a good chance in their counseling process.

3. Backup Options: If Computer Science is your first preference, try opting for related branches like Information Technology or Software Engineering in some colleges that offer these as alternatives.

Make sure to also look into college-specific counseling processes to see if there are any opportunities for you to get a seat.

Hope it helps !