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35 lines
1.1 KiB
35 lines
1.1 KiB
def main():
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with open("day4.txt", "rt") as input_file:
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first_line = input_file.readlines()[0]
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lower_bound, upper_bound = tuple(first_line.strip().split("-"))
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solve(int(lower_bound), int(upper_bound))
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def solve(lower_bound, upper_bound):
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validity_map = map(lambda v: int(is_valid(v)), range(lower_bound, upper_bound))
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print("Num valids:", sum(validity_map))
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def is_valid(value):
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return has_adjacents(value) and is_increasing(value)
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def has_adjacents(value):
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digits = [get_digit(value, index) for index in range(6)]
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adjacent_digits = []
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for i in range(6 - 1):
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if digits[i] == digits[i + 1]:
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adjacent_digits.append(digits[i])
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return any(sum(a == d for d in adjacent_digits) == 1 for a in set(adjacent_digits))
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def is_increasing(value):
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digits = [get_digit(value, index) for index in range(6)]
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for i in range(6 - 1):
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if digits[i + 1] < digits[i]:
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return False
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return True
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def get_digit(value, index):
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return int(str(value)[index])
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if __name__ == "__main__":
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main()
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