For convenience (both for the students and others), I'm sharing the handouts for my two black MOP classes.

There isn't a solutions file, but instead I've added relevant discussion links to almost all of the problems which will serve just as well (if not better---many of these threads could benefit from further perspectives!).

https://www.dropbox.com/sh/kzf5l6uyzgkk2tj/AAA_xuAMQHX1dlswHAuwi5e8a

Edit: If the link breaks, let me know. This will also be updated on website: http://web.mit.edu/vywang/www/

EDIT 11/2/18: The old links seem to be broken. For the next 4-5 years, please use the following links:
https://web.math.princeton.edu/~vywang/#informal (including MOP 2018 handouts, which I think are more useful than my MOP 2014 ones)
https://web.math.princeton.edu/~vywang/archive.html#resources (older handouts, including MOP 2014 and a Diophantine equations problem list)