58 lines
1.6 KiB
Python
58 lines
1.6 KiB
Python
|
#!/usr/bin/env python
|
||
|
|
|
||
|
|
import itertools
|
||
|
|
import re
|
||
|
|
import sys
|
||
|
|
from typing import Dict, List
|
||
|
|
|
||
|
|
|
||
|
|
def parse_rule(raw_rules: List[str]) -> str:
|
||
|
|
parsed: Dict[int, str] = {}
|
||
|
|
rules = {int(num): rule.strip() for num, rule in (i.split(":") for i in raw_rules)}
|
||
|
|
|
||
|
|
for n, r in rules.items():
|
||
|
|
if '"' not in r:
|
||
|
|
continue
|
||
|
|
parsed[n] = r.replace('"', "")
|
||
|
|
|
||
|
|
while 0 not in parsed:
|
||
|
|
for num in parsed:
|
||
|
|
if num not in rules:
|
||
|
|
continue
|
||
|
|
rules.pop(num)
|
||
|
|
|
||
|
|
for num, r in rules.items():
|
||
|
|
nums = list(reversed(sorted(map(int, re.findall("(\\d+)", r)))))
|
||
|
|
if all(n in parsed for n in nums):
|
||
|
|
for n in nums:
|
||
|
|
r = re.sub(str(n), parsed[n], r) # Bigger numbers replaced first
|
||
|
|
r = r.replace(" ", "{x}" if num == 11 else "")
|
||
|
|
if num == 11:
|
||
|
|
r = "(" + r + "{x})"
|
||
|
|
r = "(" + r + ")"
|
||
|
|
if num == 8:
|
||
|
|
r = "(" + r + "+)"
|
||
|
|
parsed[num] = r
|
||
|
|
return parsed[0]
|
||
|
|
|
||
|
|
|
||
|
|
def solve(raw: List[str]) -> int:
|
||
|
|
pattern = parse_rule(list(itertools.takewhile(len, raw)))
|
||
|
|
|
||
|
|
def matches(repeats: int) -> int:
|
||
|
|
pat = re.compile(pattern.replace("x", str(repeats)))
|
||
|
|
return sum(
|
||
|
|
pat.fullmatch(line) is not None for line in itertools.dropwhile(len, raw)
|
||
|
|
)
|
||
|
|
|
||
|
|
return sum(itertools.takewhile(bool, map(matches, itertools.count(1))))
|
||
|
|
|
||
|
|
|
||
|
|
def main() -> None:
|
||
|
|
input = [line.strip() for line in sys.stdin.readlines()]
|
||
|
|
print(solve(input))
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
main()
|