The most popular computer science contest among schoolchildren in Russia. Since 2008, it has gathered about 300,000 schoolchildren annually (participants include residents of Russia and 4 countries in Europe and Asia). It is held in a test format and divided by classes: 1, 2-3, 4-5, 6-7, 8-9, and 10-11. There are 30 tasks with 5 answer options, from which the correct one must be selected. One hour is allocated for completion.