Freshman Applicants - | University of South Carolina suggests that your ACT is your strongest stat, while your class rank is your weakest stat. Admission seems likely based on the stat ranges listed there, but getting Capstone Scholars or Honors College is harder to assess (more likely if they emphasize ACT, less likely if they emphasize class rank).
If the minimum criteria to change majors after enrolling is any indication, computer science may be a little more competitive than the baseline, but not as competitive as some other majors like nursing and some business majors: Change of Major Requirements - Academic Advising | University of South Carolina