Codeforces Round #647 (Div. 2) 題解

A. Johnny and Ancient Computerspa 查看題解 位運算 B. Johnny and His Hobbies.net 查看題解 暴力 C. Johnny and Another Rating Dropblog 查看題解 位運算 D. Johnny and Contributionci 查看題解 圖+模擬 E. Johnny and Grandmasterget 查看題解

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