Hi Manjunath
Congratulations for getting 180 marks but these score will not get  fetch you to get Top nits in computer science you can get average Nit like

1) NIT Raipur

2) NIT Hamirpur

3) NIT Silchar

4) NIT Jalandhar

5) NIT Durgapur

6) NIT Arunachal Pradesh

7) NIT Mizoram

8) NIT Srinagar

These are some average Nits where you can get computer science in these score

Hope above information is useful for you
If you have any doubt you can comment below I am more than happy to help you

Good luck