As usual, we meet at 4pm in MSC E306.

We'll look at a few combinatorial problems from recent Putnam exams.
(One of them is left over from last time.)  I did not announce these
problems beforehand.

Problems: 2013 A-2, 2013 B-3, 2016 A-4, 2017 A-4, 2022 B-3.

POSTSCRIPT: Thanks to Casey and Matthew for attending.  They solved
two problems, 2013 A-2 and 2016 A-4.  We'll save the rest for next
time, and maybe add some "calculus".