dear akash singh

first of all check your rank based on your marks then you can refer following links to predict the cutoff of this year comparing with that of previous year's.

https://www.collegepravesh.com/cutoff/nit-manipur-cutoff-2017/

https://collegedunia.com/college/13838-institute-of-engineering-and-technology-iet-lucknow/cutoff-upsee

good luck