Google Code Jam 2010: Phew!
I've just qualified for Round 1 on CodeJam 2010. I've found the exercises interesting but I was stuck with Fair Warning and I failed the large problem set for the Theme Park. Snapper Chain was the easiest (IMHO) as far as you saw the connection with binary numbers. One more year I'm ready to bite the dust on Round 1.
Update: Yep, as expected I failed to move beyond Round 1. I solved two first problems but failed the large data on the second because of my insistence to use int instead of long integers.