10/20/2013 -- Beginners Circle: Catch-up day (Oleg Gleizer)
We will go over all the problems in the second and third handout that some students could not figure out themselves. It will be mostly students explaining their solutions to fellow students. The teachers will only help if there is on one else to solve a problem. If any time remains, we will do some olympiad-style problems on the pigeonhole principle.