Two years ago (or something like that) GCJ problemsetters announced commandline-tool, which can download input, make submissions, and view current contest state. It support was not very long, but before last contest it worked as is (at least downloading and submitting).
Before last contest I discovered, it can't login to google account because it get HTTP 404 error. Any ideas what got wrong and how to fix it?
Also I'm interested if anyone else, except me, use it?
It seems the problem is in changed Authentication mechanism. https://developers.google.com/identity/protocols/AuthForInstalledApps
Deprecated URL is used here: https://code.google.com/p/codejam-commandline/source/browse/trunk/lib/google_login.py#103