shell
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def shell(a):
n=len(a)//2
while n>0:
for i in range(n,len(a)):
key=a[i]
k=i
while k>=n and a[k-n]>key:
a[k]=a[k-n]
k=k-n
a[k]=key
n=n//2
a=[12, 34, 54, 2, 3]
result=shell(a)
print(a)
Python
INFO