119 lines
3.3 KiB
Python
119 lines
3.3 KiB
Python
def get_input(sample = False, sample_name = "sample"):
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with open(sample_name if sample else "input", "r") as f:
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return [list(l.strip()) for l in f.readlines()]
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def is_there_occupied(range_x, range_y, seats):
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try:
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for x, y in zip(range_x, range_y):
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# print(f"\tChecking: {x}, {y}")
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if seats[y][x] == "#":
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# print(f"\tFound an # at {x}, {y}")
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return True
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elif seats[y][x] == "L":
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return False
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return False
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except IndexError:
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return False
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def count_occupied_direction(center_x, center_y, seats):
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count = 0
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len_x = len(seats[0])
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len_y = len(seats)
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directions = [
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( # N
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[center_x] * center_y,
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range(center_y - 1, -1, -1)
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),
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( # NE
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range(center_x + 1, len_x),
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range(center_y - 1, -1, -1)
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),
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( # E
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range(center_x + 1, len_x),
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[center_y] * (len_x - center_x)
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),
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( # SE
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range(center_x + 1, len_x),
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range(center_y + 1, len_y)
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),
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( # S
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[center_x] * (len_y - center_y),
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range(center_y + 1, len_y)
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),
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( # SW
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range(center_x - 1, -1, -1),
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range(center_y + 1, len_y)
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),
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( # W
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range(center_x - 1, -1, -1),
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[center_y] * center_x
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),
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( # NW
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range(center_x - 1, -1, -1),
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range(center_y - 1, -1, -1),
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)
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]
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for range_x, range_y in directions:
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if is_there_occupied(range_x, range_y, seats):
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count += 1
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return count
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def count_occupied_around(center_x, center_y, seats):
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count = 0
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len_x = len(seats[0])
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len_y = len(seats)
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for y in range(center_y-1, center_y+2):
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for x in range(center_x-1, center_x+2):
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if x in range(len_x) and y in range(len_y) and (x, y) != (center_x, center_y):
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if seats[y][x] == "#" : count += 1
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return count
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def get_dummy_seats(len_x, len_y):
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ret = []
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for y in range(len_y):
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line = ""
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for x in range(len_x):
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line += "."
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ret.append(line)
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return ret
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def get_result(seats: list, part = 1):
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len_x = len(seats[0])
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len_y = len(seats)
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prev_seats = get_dummy_seats(len_x, len_y)
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while prev_seats != seats:
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new_seats = [[item for item in line] for line in seats]
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for y in range(len_y):
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for x in range(len_x):
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place = seats[y][x]
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if place == ".": continue
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count = count_occupied_around(x, y, seats) if part == 1 else count_occupied_direction(x, y, seats)
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if place == "L" and count == 0:
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new_seats[y][x] = "#"
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elif place == "#" and count >= (4 if part == 1 else 5):
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new_seats[y][x] = "L"
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prev_seats = seats
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seats = new_seats
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count = 0
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for line in seats:
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for char in line:
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if char == "#": count += 1
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return count
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if __name__ == "__main__":
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print(get_result(get_input(), part = 2))
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