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Название: International Olympiad in Informatics 2008 - tasks and solutions
Авторы: Peng R., Tzanov V., Ilic A.
The International Mathematical Olympiad (IMO) is a competition for high school students. China has taken part in the IMO 21 times since 1985 and has won the top ranking for countries 14 times, with a multitude of golds for individual students.