If you are looking for some fall entertainment that can also get your brain back into gear for the first term, then look no further than the SAC Problem Competition.
While you do not need to be an undergraduate affiliate or a graduate student member of the CAP to participate in this challenge, you do need to be someone who would qualify to become an affiliate or graduate student member – as do all members of your team if you choose to participate as a team. You can see the eligibility requirements for undergraduates here: https://www.cap.ca/membership/undergraduate-student-affiliateship/ and for graduate students here: https://www.cap.ca/membership/graduate-student-membership/
While looking at the criteria, consider joining. There is no fee while an undergraduate student and, for graduate students, your first year as a graduate student member is free.