WARNING:

I'm fairly certain the tests are bugged for the Python version of this problem (unsure of others). The issue has to do with the following line in the problem description:

"Any activities completed that are ranking 2 levels or more lower than the user's ranking will be ignored"

Tests I've run indicate some of the tests account for this properly, while other tests still provide 1 point of progress for all problem ranks below the user's rank. As far as I can tell, the tests will need to be fixed before a solution can be properly validated. As it stands my program fails one set of tests when built one way, and fails the other set of tests when built the other.