advent_of_code/2025/4/4.py
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2025 - Day 4 part 1
2025-12-05 17:38:08 +01:00

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Python

#!/usr/bin/env python
# 2025 - Advent Of Code 4
# file = 'input_example.txt'
file = 'input.txt'
# pylint: disable=consider-using-with
input_lines = [line.strip('\n') for line in open(file, encoding="utf-8")]
MAX_X = len(input_lines[0])
MAX_Y = len(input_lines)
accessible = 0
for pos_y in range(0, MAX_Y):
for pos_x in range(0, MAX_X):
if input_lines[pos_y][pos_x] == '@':
rolls = 0
if pos_y > 0 and pos_x > 0 and input_lines[pos_y-1][pos_x-1] == '@':
rolls += 1
if pos_y > 0 and input_lines[pos_y-1][pos_x] == '@':
rolls += 1
if pos_y > 0 and pos_x < MAX_X - 1 and input_lines[pos_y-1][pos_x+1] == '@':
rolls += 1
if pos_x > 0 and input_lines[pos_y][pos_x-1] == '@':
rolls += 1
if pos_x < MAX_X - 1 and input_lines[pos_y][pos_x+1] == '@':
rolls += 1
if pos_y < MAX_Y - 1 and pos_x > 0 and input_lines[pos_y+1][pos_x-1] == '@':
rolls += 1
if pos_y < MAX_Y - 1 and input_lines[pos_y+1][pos_x] == '@':
rolls += 1
if pos_y < MAX_Y - 1 and pos_x < MAX_X - 1 and input_lines[pos_y+1][pos_x+1] == '@':
rolls += 1
if rolls < 4:
accessible += 1
print('x', end='')
else:
print('@', end='')
else:
print('.', end='')
print()
print(accessible)