You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
10 months ago
|
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)
|