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24 lines
433 B
Python
24 lines
433 B
Python
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def matches(num):
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previous = ""
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two_adjacents = False
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for digit in str(num):
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if digit == previous:
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two_adjacents = True
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if digit < previous:
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return 0
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previous = digit
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return 1 if two_adjacents else 0
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def main():
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count = 0
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for password in range(271973, 785961 + 1):
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count += matches(password)
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print(count)
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if __name__ == "__main__":
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main()
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