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Add solution for this day

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Isaac Shoebottom
2025-12-04 11:26:18 -04:00
parent cf5207cca3
commit 7075b217c3
4 changed files with 180 additions and 19 deletions
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88
2024/04/solution.py
View File

@@ -1,3 +1,91 @@
from aocd import get_data
data = get_data(day=4, year=2024)
table = data.split()
table.reverse()
table = [list(row) for row in table]
def east(x1, y1):
try:
if table[y1][x1] == "X" and table[y1][x1 + 1] == "M" and table[y1][x1 + 2] == "A" and table[y1][x1 + 3] == "S":
print(table[y1][x1], table[y1][x1 + 1], table[y1][x1 + 2], table[y1][x1 + 3])
return True
except IndexError:
return False
def west(x1, y1):
try:
if table[y1][x1] == "X" and table[y1][x1 - 1] == "M" and table[y1][x1 - 2] == "A" and table[y1][x1 - 3] == "S":
print(table[y1][x1], table[y1][x1 - 1], table[y1][x1 - 2], table[y1][x1 - 3])
return True
except IndexError:
return False
def north(x1, y1):
try:
if table[y1][x1] == "X" and table[y1 + 1][x1] == "M" and table[y1 + 2][x1] == "A" and table[y1 + 3][x1] == "S":
print(table[y1][x1], table[y1 + 1][x1], table[y1 + 2][x1], table[y1 + 3][x1])
return True
except IndexError:
return False
def south(x1, y1):
try:
if table[y1][x1] == "X" and table[y1 - 1][x1] == "M" and table[y1 - 2][x1] == "A" and table[y1 - 3][x1] == "S":
print(table[y1][x1], table[y1 - 1][x1], table[y1 - 2][x1], table[y1 - 3][x1])
return True
except IndexError:
return False
def northeast(x1, y1):
try:
if table[y1][x1] == "X" and table[y1 + 1][x1 + 1] == "M" and table[y1 + 2][x1 + 2] == "A" and table[y1 + 3][x1 + 3] == "S":
print(table[y1][x1], table[y1 + 1][x1 + 1], table[y1 + 2][x1 + 2], table[y1 + 3][x1 + 3])
return True
except IndexError:
return False
def northwest(x1, y1):
try:
if table[y1][x1] == "X" and table[y1 + 1][x1 - 1] == "M" and table[y1 + 2][x1 - 2] == "A" and table[y1 + 3][x1 - 3] == "S":
print(table[y1][x1], table[y1 + 1][x1 - 1], table[y1 + 2][x1 - 2], table[y1 + 3][x1 - 3])
return True
except IndexError:
return False
def southeast(x1, y1):
try:
if table[y1][x1] == "X" and table[y1 - 1][x1 + 1] == "M" and table[y1 - 2][x1 + 2] == "A" and table[y1 - 3][x1 + 3] == "S":
print(table[y1][x1], table[y1 - 1][x1 + 1], table[y1 - 2][x1 + 2], table[y1 - 3][x1 + 3])
return True
except IndexError:
return False
def southwest(x1, y1):
try:
if table[y1][x1] == "X" and table[y1 - 1][x1 - 1] == "M" and table[y1 - 2][x1 - 2] == "A" and table[y1 - 3][x1 - 3] == "S":
print(table[y1][x1], table[y1 - 1][x1 - 1], table[y1 - 2][x1 - 2], table[y1 - 3][x1 - 3])
return True
except IndexError:
return False
total = 0
for y in range(len(table)):
for x in range(len(table[y])):
if east(x, y):
total += 1
if west(x, y):
total += 1
if north(x, y):
total += 1
if south(x, y):
total += 1
if northeast(x, y):
total += 1
if northwest(x, y):
total += 1
if southeast(x, y):
total += 1
if southwest(x, y):
total += 1
print(total)

72
2025/04/solution.py Normal file
View File

@@ -0,0 +1,72 @@
from aocd import get_data
data = get_data(day=4, year=2025)
table = [list(row) for row in data.split()]
roll = '@'
empty = '.'
count = 0
directions = [
(0, 1), # east
(0, -1), # west
(1, 0), # north
(-1, 0), # south
(1, 1), # northeast
(1, -1), # northwest
(-1, 1), # southeast
(-1, -1) # southwest
]
# pad the table with the empty character
padded_table = table.copy()
padded_table.insert(0, [empty] * len(table[0]))
padded_table.append([empty] * len(table[0]))
for i in range(len(padded_table)):
padded_table[i].insert(0, empty)
padded_table[i].append(empty)
# check 8 directions, if there is fewer than four rolls, count it as a valid position and continue
for y in range(1, len(padded_table) - 1):
for x in range(1, len(padded_table[0]) - 1):
if padded_table[y][x] == roll:
roll_count = 0
for direction in directions:
dx, dy = direction
try:
if padded_table[y + dy][x + dx] == roll:
roll_count += 1
except IndexError:
continue
if roll_count < 4:
count += 1
print(count)
# part 2
count_two = 0
def remove_rolls(count, table):
for y in range(1, len(table) - 1):
for x in range(1, len(table[0]) - 1):
if table[y][x] == roll:
roll_count = 0
for direction in directions:
dx, dy = direction
try:
if table[y + dy][x + dx] == roll:
roll_count += 1
except IndexError:
continue
if roll_count < 4:
count += 1
table[y][x] = empty
return count, table
prev = -1
table_two = padded_table.copy()
while prev != count_two:
prev = count_two
count_two, table_two = remove_rolls(count_two, table_two)
print(count_two)
print(count_two)

2
pyproject.toml
View File

@@ -5,5 +5,5 @@ description = "Add your description here"
readme = "README.md"
requires-python = ">=3.11"
dependencies = [
"advent-of-code-data>=2.0.4",
"advent-of-code-data>=2.1.0",
]

37
uv.lock generated
View File

@@ -1,20 +1,21 @@
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