kalaspuff/advent-of-code

My solutions to some of the Advent of Code programming puzzles.

👆🧝💻 A custom shell for the device given by the Elves during 2022 - day 7.

Writing solutions

Solutions go in the yearYYYY/dayXX/part1.py and yearYYYY/dayXX/part2.py files. The puzzle input goes into yearYYYY/dayXX/input. Additional example puzzle input could be put in the same folder with any arbitrary file name (example is a good name if there's only one type of example input).

The Python files part1.py and part2.py should have a function called run defined that will be called. The import from values import values is recommended to get easy access to the puzzle input.

Here's an example solution for the puzzle from year 2020, day 3, part 2.

import functools
import operator
from typing import List

from values import values


def cmp(*args: List) -> int:
    return functools.reduce(
        lambda a, b: a or b,
        [
            cmp(*map(lambda v: [v, [v]][isinstance(v, int)], pair))
            if list in map(type, pair)
            else cmp(*map(lambda i: [[]] * i, pair))
            for pair in zip(*args)
        ]
        + [0],
    ) or max(min(1, operator.sub(*map(len, args))), -1)


async def run() -> int:
    divider1 = [[2]]
    divider2 = [[6]]

    rows = [eval(row) for row in values.rows if row] + [divider1, divider2]
    sorted_rows = [[]] + sorted(rows, key=functools.cmp_to_key(cmp))
    return (sorted_rows.index(divider1)) * (sorted_rows.index(divider2))


# [values.year]            (number)  2022
# [values.day]             (number)  13
# [values.part]            (number)  2
# [values.input_filename]  (str)     ./year2022/day13/input
#
# Result: 19570

Running solutions

$ python aoc.py <year> <day> <part> [puzzle input filename]

If no puzzle input filename is specified, the default input file for the puzzle's day will be used as the puzzle input.

Example – to run the solution from the example above (year 2022, day 13, part 2).

$ python aoc.py 2022 13 2

# [values.year]            (number)  2022
# [values.day]             (number)  13
# [values.part]            (number)  2
# [values.input_filename]  (str)     ./year2022/day13/input
#
# Result: 19570