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观云卷云舒

#1 Created at ... [Delete] [Delete and Lock User]

>>> def move(n,a,b,c):

...     if n==1:

...         print(a,'-->',c)

...     else:

...         move(n-1,a,c,b)

...         move(1,a,b,c)

...         move(n-1,b,a,c)

...

>>> move(3,'A','B','C')

A --> C

A --> B

C --> B

A --> C

B --> A

B --> C

A --> C

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