題目網址: www.puzzleup.com/2011/puzzle/?237
加分時限: 12/1 7PM - 12/6 7PM
答對可得基本分１００分。答案可上傳５次，每改１次答案從基本分扣２０分。
比賽期間內可隨時上傳答案，加分時限內答對第ｎ天加（６－ｎ）分
另依題目的難易有額外加分（如有８０％的人這題答錯，答對者加８０分）
◆Eight Cubes
You have eight identical unit cubes, each of which is given a different
letter. These eight unit cubes are conjoined to form a 2x2x2 cube. You will
move on these cubes and produce 8-letter codes.
‧ You can begin your tour on any unit cube.
‧ You can pass from that cube to any of the neighboring (ie. cubes sharing a
common surface) cubes.
‧ You will visit each unit cube exactly once.
How many different codes you can produce?
你有八個一模一樣的單位立方體，每個都標一個各不相同的字母。
這八個立方體合成一個2x2x2的立方體。
依照以下的方式得出一個八字母的字串：
‧ 從任一個單位立方體做為起點；
‧ 每次移動可以到達相鄰的立方體 (即共面的立方體)；
‧ 要經過八個立方體正好一次。
試問如此一來能夠得到多少種字串？
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又有種熟悉感...
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LPH [acronym]
= Let Program Heal us
-- New Uncyclopedian Dictionary, Minmei Publishing Co.
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