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brute force solution in Clear category for Double Substring by MrPod
def double_substring(line):
for i in range(len(line) // 2, 0, -1):
for j in range(len(line) - i):
if line[i + j:].find(line[j:i + j]) != -1:
return len(line[j:i + j])
return 0
May 1, 2018