Codeforces Round #647 (Div. 2) A~D題解

目錄ios A. Johnny and Ancient Computerthis B. Johnny and His Hobbiesspa C. Johnny and Another Rating Dropcode D. Johnny and Contribution排序 A. Johnny and Ancient Computer 題意：給定兩個數A，B，問A能不能不斷經過乘或除二、四、8（能整

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