Hello aspirant, hope you are doing good.

So, firstly I'll mention the cutoffs for different subjects in UIET, chandigarh:

• B.E. in Computer Science and Engineering- 40073
• B.E. in Information Technology- 56098
• B.E. in Electronics and Communication Engineering- 71565
• B.E. in Electrical and Electronics Engineering- 88989
• B.E. in Mechanical Engineering-118987
• B.E. in Biotechnology Engineering-986251

Now that your rank  is not too high for computer science, and the fact that you have an ex serviceman quota, you definitely have a chance of getting CSE in UIET.

If you want to know about all the possible colleges that you can get into with your JEE Mains rank. you can get it here:

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope this helps you. Good Luckk!!