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Re:Codility - Automated tests of programming skills by tsiki on Friday January 08, 2010 @10:55AM (#1039748)
Thanks for the tip, topcoder looks pretty interesting in general, too.
Re:Codility - Automated tests of programming skills by eru on Friday January 08, 2010 @12:24PM (#1039951)
Also Project Euler might be worth a look. It focusses on solving math-related problems with progams.