Happily, there is a simple opt out mechanism. There are two ways to get into any company: through HR and the resume -> interview -> offer process, and the other way. (Convince a decisionmaker within the company that you, specifically, are the answer to their prayers. Get hired. Skip slush pile.)
Pick door number two. If you get your jollies off of sorting linked lists you can do so after having received the moral equivalent of an offer (which should decrease the stress to the point where you can successfully sort a linked list).