switching majors?

Hi I applied to UCSD and my first choice was comp sci and my second was mech engineering. The acceptance letter says I got in for mech engineering, but i really dont wanna do that anymore. Can i switch into computer science, or is it impossible?

Thanks!

You can try to transfer into Computer Science at the end of each quarter at UCSD. Admission is based solely on GPA. Prior to applying, you need to pass four courses: CSE 8B or 11, CSE 12, CSE 15L, and CSE 20 or Math 15A. The odds of getting in vary from quarter to quarter; it’s difficult, but not impossible. Other engineering departments have a similar process with different prerequisite courses. Many students also consider majoring in Mathematics-Computer Science or other related disciplines.