I did Google Code Jam this year, which was really rewarding. Topcoder looks like it could be even better, especially with the frequency of competitions. As for

I did Google Code Jam this year, which was really rewarding. Topcoder looks like it could be even better, especially with the frequency of competitions. As for IOI, my school only has a robotics team (which I am a member of), so I might start a group to compete in that. Thanks!