Algoritmika is site for online contests, articles, news, and other people who are interested in algorithms!
The site
launched in 2009 and was created by medalists from international competitions. On-line arenahosted 12 competitions in the school year. On this website you will find lectures, tutorials, articles, news, forum, calendar, and basically everything a player needs.
The project aims to collect in an accessible and organized way, any kind of useful resources and tasks to promote the improvement of computer science in Bulgaria and to promote information technology as a whole.
Links:
Algoritmika
Algoritmika arena