Arseniy Akopyan, IST Fellow at IST Austria, e-mail: akopjan@gmail.com.

Alexander Smirnov, Leading Researcher at Laboratory of Algebra and Number Theory of St. Petersburg Department of V.A. Steklov Institute of Mathematics(RAS), e-mail: smirnov@pdmi.ras.ru.

Alexey A. Zaslavsky, Senior Research Fellow at the Central Economics and Mathematics Institute, Moscow, Russia. Chairman of the Jury of International Geometrical Olympiad. e-mail: zaslavsky@mccme.ru

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