The Advent of Code has continued for 2016, and 2017.  I worked through the 2017 problems and was able to complete most problems on the day they were released.  My schedule was a bit busy Christmas Eve, so complete both December 24 and 25th problems on Christmas day (fun!).  I also went back and completed all of the problems from 2015 and 2016.  I have been using Java for most of the problems.  The completed tree for 2015 is shown.  You can still complete any of the problems from previous years.