Thank you for posting this!! I'll be starting college in the fall for Computer Science, so this is a great way for me to stay in practice AND improve before then!
I've done CodingBat as part of the AP Comp Sci curriculum, but the problems are relatively simple for someone studying Computer Science, and are better for practicing skills I already have, not improving them and learning new ones. These ones are real challenges, and I love it!!
And, well... if Karthik approves of it, how can I not!
