6 lines
175 B
Python
6 lines
175 B
Python
def problem_p03723(input_data):
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a, b, c = list(map(int, input_data.split()))
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e = (a - b) | (b - c)
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return bool(e | (a | b | c) % 2) * (e ^ ~-e).bit_length() - 1
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