57 lines
1.4 KiB
Python
57 lines
1.4 KiB
Python
def get_file_input(filename: str):
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ret = set()
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with open(filename, "r") as f:
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for line in f.readlines():
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rule, *pwd = line.split(":")
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pwd = "".join(pwd).strip()
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ret.add((pwd, rule))
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return ret
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def main(use_sample_input = True):
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sample = {
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("abcde", "1-3 a"),
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("cdefg", "1-3 b"),
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("ccccccccc", "2-9 c"),
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}
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expected_result = 2
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res = get_result(sample if use_sample_input else get_file_input("input"))
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if use_sample_input:
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return f"{res} {res==expected_result}"
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else:
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return res
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def check_n_chars(pwd: str, char: str, n_min: int, n_max: int) -> bool: # part 1
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n = 0
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for c in pwd:
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if c == char:
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n += 1
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return n_min <= n and n <= n_max
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def check_pos_chars(pwd:str, char: str, pos1: int, pos2: int) -> bool: # part 2
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return (pwd[pos1] == char) != (pwd[pos2] == char)
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def is_pwd_ok(pwd: str, rule: str) -> bool:
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*delimiters, char = rule.split(" ")
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n_min, n_max = "".join(delimiters).split("-")
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n_min = int(n_min)
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n_max = int(n_max)
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return check_pos_chars(pwd, char, n_min - 1, n_max - 1)
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def get_result(data: dict) -> int:
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ret = 0
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for pwd, rule in data:
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b = is_pwd_ok(pwd, rule)
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ret += 1 if b else 0
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return ret
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print(main(use_sample_input = False))
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