题目网址: http://www.puzzleup.com/2015/ http://www.puzzleup.com/2015/puzzle/?2 答题时限: ８月６日７ＰＭ－比赛结束（约12月16日） 加分时限: ８月６日７ＰＭ－８月11日６：５９ＰＭ 答对可得基本分１００分。答案可上传５次，每改１次答案从基本分扣２０分。　 比赛期间内可随时上传答案，加分时限内答对第ｎ天加（６－ｎ）分　 　　 　　 另依题目的难易有额外加分（如有８０％的人这题答错，答对者加８０分）　　 ◆COLORED CUBES You have red, blue and green unit cubes. You will create a 2x2x2 cube by using 8 of these unit cubes. What is the maximum number of different cubes you can create? Note: If a cube can be obtained by rotating another one, these two cubes are not considered to be different. If the problem was asked for only red and blue unit cubes, the answer would be 23. 你有一些红、蓝、绿的单位立方体。你使用其中八个建构 2x2x2 的立方体。 试问你能做出几种不同的立方体？ 注: 若一个立方体能经由旋转成为另一个，则两者视为相同。 若问题改问红蓝两色，则答案为 23。 -- 'Oh, Harry, don't you see?' Hermione breathed. 'If she could have done one thing to make absolutely sure that every single person in this school will read your interview, it was banning it!' ---'Harry Potter and the order of the phoenix', P513 --

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