Danny Engelbarts

@witchdoc.bsky.social

Linux, python, nerd, programmer, maker.

$import re regex = re.compile(r"\$?(?P<val>[\d\.]+)(?P<mil>M)?(?P<bil>B)?", re.I) def cap_str_to_mln_float(cap: str) -> float: if match := regex.match(cap.strip()): return float(match["val"]) * (1000 if match["bil"] else 1) return 0.0$

Landscape picture of a country road winding through fields and forest on a sunny day.

Hitachi D40 PLC complete with programmer console.

Forest road with shadowy trees and sunbeams, nearly overexposed.

Sunbeams shining on two hay bales at the edge of a forest.

$import re from itertools import product input = [] with open("./input_day7.txt", "r") as fin: for line in fin.readlines(): input.append(line.strip()) def mul(a, b): return str(int(a) * int(b)) def sum(a, b): return str(int(a) + int(b)) def concat(a, b): return f"{a}{b}" total = 0 for prod, _, *vars in [re.split(":| ", line) for line in input]: operations = mul, sum # add concat for part II for ops in product(operations, repeat=len(vars)-1): t = vars[0] for v, op in zip(vars[1:], ops): t = op(t, v) if t == prod: total += int(prod) break print(total)$