rodrigogiraoserrao

# === Parsing ===

obstacles = set()
walls = set()
initial_position = None
with open("input.txt", "r") as f:
    for y, line in enumerate(iter(f.readline, "\n")):
        for x, char in enumerate(line.strip()):
            if char == "@":
                initial_position = (x, y)

rodrigogiraoserrao

# === Parsing ===
import re

LINE_RE = re.compile(r"p=(\d+),(\d+) v=(-?\d+),(-?\d+)")
WIDTH = 101
HEIGHT = 103

robots = []
with open("input.txt", "r") as f:
    for line in f:

rodrigogiraoserrao

# === Parsing ===
from fractions import Fraction as F
from itertools import batched
import re

BUTTON_RE = re.compile(r"Button .: X\+(\d+), Y\+(\d+)")
PRIZE_RE = re.compile(r"Prize: X=(\d+), Y=(\d+)")

games = []
with open("input.txt", "r") as f:

rodrigogiraoserrao

# === Parsing ===

from collections import defaultdict

garden = defaultdict(str)
with open("input.txt", "r") as f:
    for y, line in enumerate(f):
        for x, plot in enumerate(line.strip()):
            garden[x, y] = plot
    WIDTH = x + 1

rodrigogiraoserrao

# === Parsing ===

with open("input.txt", "r") as f:
    nums = map(int, f.read().split())


# === Part 1 ===
from collections import Counter

rodrigogiraoserrao

# === Parsing ===
from collections import defaultdict

map = defaultdict(lambda: -1)
with open("input.txt", "r") as f:
    for y, line in enumerate(f):
        for x, char in enumerate(line.strip()):
            map[x, y] = int(char)
    MAX_X = x
    MAX_Y = y

rodrigogiraoserrao

# === Parsing ===

with open("input.txt", "r") as f:
    filesystem_string = f.read().strip()

filesystem = [
    [(idx // 2 if idx % 2 == 0 else None, int(char))]
    for idx, char in enumerate(filesystem_string)
]

rodrigogiraoserrao

# === Parsing ===

antennas = {}
with open("input.txt", "r") as f:
    for y, line in enumerate(f):
        for x, char in enumerate(line.strip()):
            if char != ".":
                antennas.setdefault(char, set()).add((x, y))

    max_x = x

rodrigogiraoserrao

# === Parsing ===

equations = []
with open("input.txt", "r") as f:
    for line in f:
        target, _, operands = line.partition(":")
        equations.append(
            (
                int(target),
                [int(num) for num in operands.split()],

rodrigogiraoserrao

# === Parsing ===

obstacles = set()  # (x, y) positions of the obstacles.
initial_position = None
with open("input.txt", "r") as f:
    for y, line in enumerate(f):
        for x, char in enumerate(line):
            if char == "#":
                obstacles.add((x, y))
            elif char == "^":