commit 04e3f385b8c66a213f33dc377b2db7026521be4b · kot.pink/aoc

+34 -19

4.py

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       import sys

     

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       available_rolls = 0

     

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       file = '4.input' if len(sys.argv) <= 1 else sys.argv[1]

     

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       grid = list(map(str.strip, open(file).readlines()))

     

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       def check_occupied(y: int, x: int) -> int:

     

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           try:

     

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               return x >= 0 and y >= 0 and grid[y][x] == "@"

     

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           except IndexError:

     

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               return False

     

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       for y in range(len(grid)):

     

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           row = grid[y]

     

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           for x in range(len(row)):

     

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               if row[x] != "@": continue

     

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               adj = sum([

     

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                   check_occupied(y-1, x-1), check_occupied(y-1, x), check_occupied(y-1, x+1),

     

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                   check_occupied(y, x-1), check_occupied(y, x+1),

     

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                   check_occupied(y+1, x-1), check_occupied(y+1, x), check_occupied(y+1, x+1)

     

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               ])

     

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               if adj < 4:

     

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                   available_rolls += 1

     

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       print(f'p1: {available_rolls}')

     

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       # print(f'p2: {}')

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       import sys

     

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       from typing import List, Optional, Tuple

     

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       removed_rolls = 0

     

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       file = '4.input' if len(sys.argv) <= 1 else sys.argv[1]

     

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       grid = list(map(list, map(str.strip, open(file).readlines())))

     

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       def check_occupied(y: int, x: int) -> Optional[Tuple[int, int]]:

     

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           try:

     

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               if x >= 0 and y >= 0 and grid[y][x] == "@":

     

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                   return (y, x)

     

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           except IndexError: pass

     

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           return None

     

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       def compute_adj(y: int, x: int) -> List[Optional[Tuple[int, int]]]:

     

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           return [

     

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               check_occupied(y-1, x-1), check_occupied(y-1, x), check_occupied(y-1, x+1),

     

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               check_occupied(y, x-1), check_occupied(y, x+1),

     

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               check_occupied(y+1, x-1), check_occupied(y+1, x), check_occupied(y+1, x+1)

     

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           ]

     

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       def search_removable() -> List[Tuple[int, int]]:

     

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           removable = []

     

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           for y in range(len(grid)):

     

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               for x in range(len(grid[y])):

     

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                   if grid[y][x] != "@": continue

     

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                   adj = compute_adj(y, x)

     

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                   if sum(map(bool, adj)) < 4:

     

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                       removable.append((y, x))

     

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           return removable

     

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       removable = search_removable()

     

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       print(f'p1: {len(removable)}')

     

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       while len(removable):

     

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           for (y, x) in removable:

     

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               grid[y][x] = "."

     

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               removed_rolls += 1

     

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           removable = search_removable()

     

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       print(f'p2: {removed_rolls}')
     

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