if n == 1:
print(a, '-->', c)
return
move(n-1,a,c,b)
move(n-1,b,a,c)
move(3, 'A', 'B', 'C')
A --> C
A --> B
C --> B
B --> A
B --> C
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宇宙计时器
if n == 1:
print(a, '-->', c)
return
move(n-1,a,c,b)
print(a, '-->', c)
move(n-1,b,a,c)
A --> C
A --> B
C --> B
A --> C
B --> A
B --> C
A --> C