n=len(a)
for i in range(n//2-1):
for j in range(n-2,2*i,-2):
if a[j]<a[j-2]:
a[j],a[j-2]=a[j-2],a[j]
该程序段实现的功能是( )
def move(n,a,b,c):
if n==1:
print(a,"->",c) return
move(n-1,a,c,b)
move(1,a,b,c)
move(n-1,b,a,c)
执行语句 move(2,"A","B","C"),输出的第一行内容是( )