MAIN is an e-learning portal of Polish Olympiad in Informatics. It was created in Polish in 2005, its English version was added in 2008. We store a problem archive from various programming competitions, including: Polish Olympiad in Informatics, an annual open Polish programming contest Algorithmic Engagements, several international olympiads in informatics (selected editions of CEOI, BOI and IOI) and Polish Collegiate Programming Contest (AMPPZ). We enable on-line automatic grading of the problems.
MAIN is a place where anyone can improve their programming and algorithmic skills. We take effort to continuously improve the portal and extend parts of its content that are available in English. Hope to see you here often!