http://matholimp.livejournal.com/ ([identity profile] matholimp.livejournal.com) wrote in [personal profile] matholimp 2011-01-28 07:16 pm (UTC)

Секрет в красоте и нестандартности решения. Задача очень трудная, но не требует вообще никаких знаний из школьного курса.

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