main
HeNine 11 months ago
parent ea5dacf69c
commit 838f8c9654

@ -0,0 +1,10 @@
467..114..
...*......
..35..633.
......#...
617*......
.....+.58.
..592.....
......755.
...$.*....
.664.598..

@ -0,0 +1,140 @@
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@ -0,0 +1,36 @@
import re
def do_task(lines):
lines = (
["." * (len(lines[0]) + 2)]
+ ["." + line.strip() + "." for line in lines]
+ ["." * (len(lines[0]) + 2)]
)
symbol_sum = 0
for y in range(1, len(lines) - 1):
for m in re.finditer(r"\d+", lines[y]):
if re.search(
r"[^.0-9]",
lines[y - 1][m.start() - 1 : m.end() + 1]
+ lines[y][m.start() - 1] + lines[y][m.end()]
+ lines[y + 1][m.start() - 1 : m.end() + 1],
):
symbol_sum += int(m[0])
return symbol_sum
with open("day03/data/input100.txt") as infile:
lines = infile.readlines()
result = do_task(lines)
print(result)
print(result == 4361)
with open("day03/data/input101.txt") as infile:
lines = infile.readlines()
result = do_task(lines)
print(result)
print(result == 525181)

@ -0,0 +1,48 @@
def do_task(lines):
lines = (
["." * (len(lines[0]) + 2)]
+ ["." + line.strip() + "." for line in lines]
+ ["." * (len(lines[0]) + 2)]
)
gears = dict()
for y in range(1, len(lines) - 1):
n = 0
ni = []
for x, c in enumerate(lines[y]):
if c in "0123456789":
n = n * 10 + int(c)
ni.append(x)
elif n != 0:
for i in range(min(ni) - 1, max(ni) + 2):
if lines[y-1][i] == "*":
if (i, y-1) not in gears:
gears[(i, y-1)] = []
gears[(i, y-1)].append(n)
if lines[y][i] == "*":
if (i, y) not in gears:
gears[(i, y)] = []
gears[(i, y)].append(n)
if lines[y+1][i] == "*":
if (i, y+1) not in gears:
gears[(i, y+1)] = []
gears[(i, y+1)].append(n)
n = 0
ni = []
return sum([ns[0] * ns[1] if len(ns) == 2 else 0 for ns in gears.values()])
with open("day03/data/input100.txt") as infile:
lines = infile.readlines()
result = do_task(lines)
print(result)
print(result == 467835)
with open("day03/data/input101.txt") as infile:
lines = infile.readlines()
result = do_task(lines)
print(result)
print(result == 84289137)
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