2020-12-06 20:08:50 +00:00
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with open("input.txt","r") as f:
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groups = f.read().split('\n\n')
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2020-12-06 22:27:34 +00:00
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sets = [list(map(set, group.split('\n'))) for group in groups]
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reduce = lambda fn: sum(len(fn(*s)) for s in sets)
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print(reduce(set.union), reduce(set.intersection))
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