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例子
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标记规则n-gon 1,2,…,的顶点,。。。,n.(名词)。
对于n=3,4,5,此处计算的多边形的代表为:
(1,2,3,1),
(1,2,3,4,1), (1,2,4,3,1),
(1,2,3,4,5,1), (1,2,3,5,4,1), (1,2,4,5,3,1), (1,3,5,2,4,1).
对于n=6:
(1,2,3,4,5,6,1), (1,2,3,4,6,5,1), (1,2,3,5,6,4,1),
(1,2,3,6,5,4,1), (1,2,4,3,6,5,1), (1,2,4,6,3,5,1),
(1,2,4,6,5,3,1), (1,2,5,3,6,4,1), (1,2,5,4,6,3,1),
(1,2,5,6,3,4,1), (1,2,6,4,5,3,1), (1,3,5,2,6,4,1).
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