题目网址: http://www.puzzleup.com/2015/
http://www.puzzleup.com/2015/puzzle/?9
答题时限: ９月24日７ＰＭ－比赛结束（约12月16日）
加分时限: ９月24日７ＰＭ－９月29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）　　
◆CUBE TRAVEL
http://www.puzzleup.com/2015/img/puzzle/2015/09.jpg
You will make a travel through the edges of two cubes connected by their
vertices as shown in the figure.
- You will start on A, and finish on B.
- You can pass through the vertices more than once except the finishing
vertex B.
- You can't pass through the edges more than once.
In how many different ways can this travel be done?
Note: Two travels having same edges in different order will be considered as
different.
你将从上图这两个立方体在一个顶点相接的图形的边上进行移动。
- 路线从 A 开始，到 B 结束。
- 除了 B 之外的任一顶点皆可以经过多于一次。
- 任一条边不能经过多于一次。
试问如此的移动有多少种不同的走法？
注意: 两个走法若仅是经过的边顺序不同依然视为不同走法。