I got 39,562 rank based on ews category ,in which colleges there is a chance of getting cse and in which round

With a rank of 39,562 the chances of getting CSE is quite slim. However, you can expect to get admission at NIT Puducherry at round 5 with this rank. You can also wait for CSAB counselling and cutoff to be released by the authorities. Till then you can check the List of NITs for JEE Main 2024 rank 25,000 to 50,000.