Hi Aakash,

the best colleges that you can go for in U.P. for b. tech CSE via JEE Mains are:

• Motilal Nehru National Institute of Technology Allahabad Prayagraj
• Zakir Husain College of Engineering and Technology, Aligarh Muslim University, Aligarh
• Amity School of Engineering, Noida
• Dayalbagh Educational Institute, Agra
• Harcourt Butler Technical University, Kanpur
• Jaypee Institute of Information Technology, Noida
• Shiv Nadar University, Greater Noida

You can find the top colleges and their details here:

https://engineering.careers360.com/colleges/ranking/2018/top-engineering-colleges-in-uttar-pradesh

Hope it helps,

Good luck!