確 率 人
松浦將國個人の備忘録兼掲示板です．
British MO, 2009, Round 2, Q1
解自体を探すのであれば表計算ソフトの方が早いが，論証でしっかり詰めるのはわりと大変だろう．そんな計算例．
https://www.youtube.com/watch?v=quECgYPNCXw
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