AS results help...

Hi,
Today I got my AS results. I got:

A - OCR Computer Science AS (NEW SPEC)
A - AQA Drama & Theatre AS (NEW SPEC)
D - Edexcel Mathematics AS (modular old spec)

I really want to go to university to study computer science, some universities are specific about the mathematics grade so i am retaking core 1 and core 2 (I got an E and D respectively, I got a B in S1) in an attempt to boost my mark. I am continuing all 3 subjects to A2.

I was wondering what kind of universities should I apply for, like what entry critera would be a good idea for me to aim for? lets say for a secure and also for a realistic 'aspirational'. I'm confused as the grade combination AAD is not a combination that is commonly advertised for a course so i would wonder how i would go about finding one suitable for myself...

Any advice is appreciated... thanks.