Most people who skip I think took the class in high school (Princeton has a program with nearby high schools) - it is somewhat difficult (bureaucratically) to do so otherwise.
3 karma · joined November 30, 2016
The algebra introductory courses have different numbers, and are now 345-346 instead of 322-323. There is now an advanced graph theory class (477) that follows the introductory one. Also, there is a theoretical machine learning class (COS 511) and the algorithms/complexity graduate sequence (COS 522-523) may be relevant as well.
I will probably update these changes on the website sometime in the near future...