I get 98.7 percentile in jee main can I get admission in daiict or nirma in cs

Hello Aspirant,
As you want to take admission in DAIICT or in NIRMA, the premier institute like these accept 50% of the seats based on JEE Mains rank. So in order to get admission in any of the two colleges you need to get a very decent rank.
According to previous year cut-off trends you need to have percentile of around 99% to get a seat in DAIICT and around 97-98% in NIRMA. Therefore you can easily get CS branch in NIRMA but for DAIICT I would suggest you to wait for the last rounds of the counselling.
Hope it helps !