23 lines
417 B
Python
23 lines
417 B
Python
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# Python!
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import re
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with open('07.txt') as file:
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rows = file.read().splitlines()
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abba = re.compile(r'(\w)(\w)(?<!\1)\2\1')
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hynet_seq = re.compile('\[[^\]]*\]')
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count = 0
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for row in rows:
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valid = False
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stripped = hynet_seq.sub('|', row)
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hynets = hynet_seq.finditer(row)
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if abba.search(stripped): valid = True
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for h in hynets:
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if abba.search(h.group()): valid = False
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if valid: count += 1
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print(count)
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