Spring 2016 math

Hey there. I’m a junior at a local high school, and I’m planning on taking math concurrently at UC Berkeley for the Spring semester. I was hoping to enroll in either linear algebra/diff equations or Multivariable calculus. As a concurrent enrollment student I can’t apply until December 1st, and even then all actual students at Berkeley have priority over me. I’ve been monitoring the schedule of classes and have noticed that only a handful of classes have room for me to add in to. Do people drop classes as it gets closer to spring, or if all the classes are filled by the end of fall should I just give up and not try to get added in? Thanks!

by the way Liner algebra/diff equations = math 54 and multivariable= math 53