【題解】codeforces1047D[Codeforces Round #511 (Div. 2)]D.Little C Loves 3 II 數學知識

題目鏈接 Description Little C loves number «3» very much. He loves all things about it. Now he is playing a game on a chessboard of size n×m. The cell in the x-th row and in the y-th column is called (x,y

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