PY
py
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def specialsum(li):
x = 0
length = len(li)
for i in range(length):
x += li[i]**(length-i-1)
return x
def len_and_specialsum_sort(li):
li.sort(key=len)
sublists = [[]]
counter = 0
for i in li:
if len(i) == counter:
sublists[counter].append(i)
else:
counter += 1
sublists.append([i])
for i in sublists:
i.sort(key=specialsum)
newlist = []
for i in sublists:
newlist.extend(i)
return newlist
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OUTPUT
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