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blankplank's version, modified solution in Speedy category for Double Substring by Phil15
def double_substring(line):
length = start = 0
for end in range(1, len(line) + 1):
if line[start:end] not in line[end:]:
start += 1
elif end - start > length: # We have a candidate, is it longer than the previous one.
length = end - start
return length
April 21, 2022
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