Sphere Online Judge (SPOJ) progress

SPOJ is one of the main sites that host programming challenges. The problems in SPOJ are for the most part much easier than the ones in Project Euler (which I have also posted about, although I have neglected it for several months...), so they are quite nice to try to solve in new programming languages. At this moment there are >10K users who have submitted at least one correct solution to one of the programs, so the place is very active. The graph below will show my progress in SPOJ, although I don't really intend to compete. I will only look for problems that look interesting to develop my programming skills.