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Solve day 11
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176
2020/day11_seating.py
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176
2020/day11_seating.py
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import copy
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import functools
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import itertools
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from collections import Counter
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from pprint import pprint
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from typing import List, Tuple, Iterable, Dict, Optional
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import networkx as nx
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def main(filename: str, expected_part_1: int = None, expected_part_2: int = None):
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print(f"\n+ Running on {filename}")
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with open(filename) as f:
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seat_map = f.read()
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seat_map_part_1 = SeatMap(seat_map)
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seat_map_part_1.evolve_until_stable()
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counter_part_1 = seat_map_part_1.total_number_of_occupied()
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seat_map_part_2 = SeatMapPart2(seat_map)
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seat_map_part_2.evolve_until_stable()
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counter_part_2 = seat_map_part_2.total_number_of_occupied()
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print(f"1. Found {counter_part_1}")
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if expected_part_1:
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assert expected_part_1 == counter_part_1
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print(f"2. Found {counter_part_2}")
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if expected_part_2:
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assert expected_part_2 == counter_part_2
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Coordinates = Tuple[int, int]
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class SeatMap:
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OCCUPIED = "#"
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FREE = "L"
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FLOOR = "."
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EMPTY_THRESHOLD = 4
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def __init__(self, seat_map: str):
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self._map = dict() # type: Dict[Coordinates, str]
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rows = seat_map.split("\n")
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for row_id, row in enumerate(rows):
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for col_id, cell in enumerate(row):
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self._map[(row_id, col_id)] = cell
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self._map_height = len(rows)
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self._map_width = len(rows[0])
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def __str__(self):
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final = []
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for row_id in range(0, self._map_height):
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row = []
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for col_id in range(0, self._map_width):
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row.append(self._square_at((row_id, col_id)))
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final.append("".join(row))
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return "\n".join(final) + "\n"
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def _square_at(self, coordinates: Coordinates) -> str:
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return self._map[coordinates]
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def total_number_of_occupied(self) -> int:
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counter = Counter("".join(self._map.values()))
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return counter[self.OCCUPIED]
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def evolve_until_stable(self):
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old_map = self._map
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next_stage_map = self._evolve()
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while next_stage_map != old_map:
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old_map = next_stage_map
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next_stage_map = self._evolve()
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def _evolve(self):
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next_stage_map = dict()
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for coord, square in self._map.items():
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next_stage_map[coord] = self._square_evolve(square, coord)
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self._map = next_stage_map
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return self._map
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def _square_evolve(self, square: str, coordinates: Coordinates) -> str:
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if square == self.FLOOR:
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return square
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occupied_adjacent = self._number_of_occupied_adjacent(coordinates)
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if square == self.FREE and occupied_adjacent == 0:
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return self.OCCUPIED
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if square == self.OCCUPIED and occupied_adjacent >= self.EMPTY_THRESHOLD:
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return self.FREE
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return square
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def _number_of_occupied_adjacent(self, coordinates: Coordinates) -> int:
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count_occupied = 0
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for seat in self._visible_seats(coordinates):
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if seat == self.OCCUPIED:
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count_occupied += 1
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return count_occupied
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def _visible_seats(self, coordinates: Coordinates) -> List[str]:
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adjacent_cells = [
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self._find_top_left(coordinates),
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self._find_top(coordinates),
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self._find_top_right(coordinates),
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self._find_right(coordinates),
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self._find_bottom_right(coordinates),
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self._find_bottom(coordinates),
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self._find_bottom_left(coordinates),
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self._find_left(coordinates),
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]
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return list(map(self._square_at, filter(None, adjacent_cells)))
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@functools.lru_cache(None)
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def _find_top_left(self, coordinates: Coordinates) -> Optional[Coordinates]:
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return self._find_with_delta(coordinates, (-1, -1))
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@functools.lru_cache(None)
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def _find_with_delta(
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self, coordinates: Coordinates, delta: Tuple[int, int]
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) -> Optional[Coordinates]:
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other_coord = (coordinates[0] + delta[0], coordinates[1] + delta[1])
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try:
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self._square_at(other_coord)
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except KeyError:
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return None
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return other_coord
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@functools.lru_cache(None)
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def _find_top(self, coordinates: Coordinates) -> Optional[Coordinates]:
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return self._find_with_delta(coordinates, (-1, 0))
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@functools.lru_cache(None)
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def _find_top_right(self, coordinates: Coordinates) -> Optional[Coordinates]:
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return self._find_with_delta(coordinates, (-1, 1))
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@functools.lru_cache(None)
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def _find_right(self, coordinates: Coordinates) -> Optional[Coordinates]:
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return self._find_with_delta(coordinates, (0, 1))
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@functools.lru_cache(None)
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def _find_bottom_right(self, coordinates: Coordinates) -> Optional[Coordinates]:
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return self._find_with_delta(coordinates, (1, 1))
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@functools.lru_cache(None)
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def _find_bottom(self, coordinates: Coordinates) -> Optional[Coordinates]:
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return self._find_with_delta(coordinates, (1, 0))
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@functools.lru_cache(None)
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def _find_bottom_left(self, coordinates: Coordinates) -> Optional[Coordinates]:
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return self._find_with_delta(coordinates, (1, -1))
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@functools.lru_cache(None)
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def _find_left(self, coordinates: Coordinates) -> Optional[Coordinates]:
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return self._find_with_delta(coordinates, (0, -1))
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class SeatMapPart2(SeatMap):
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EMPTY_THRESHOLD = 5
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@functools.lru_cache(None)
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def _find_with_delta(
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self, coordinates: Coordinates, delta: Tuple[int, int]
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) -> Optional[Coordinates]:
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other_coord = (coordinates[0] + delta[0], coordinates[1] + delta[1])
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try:
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other_square = self._square_at(other_coord)
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while other_square == self.FLOOR:
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other_coord = (other_coord[0] + delta[0], other_coord[1] + delta[1])
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other_square = self._square_at(other_coord)
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except KeyError:
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return None
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return other_coord
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if __name__ == "__main__":
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main("inputs/day11-test1", 37, 26)
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main("inputs/day11", 2324, 2068)
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90
2020/inputs/day11
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90
2020/inputs/day11
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.....LLL..........L.....L..L...LL.....LL...L...L.L....L..L.LL.L.L.LL.L.L.LLL.L.L.L..L.LL.L....LL...
|
||||
LLLLL..LLLLLLLLL.LLLLLLLLL.L.LLLLLLL.LLLL.LLLLLLLLLLLLLLLLLL.LL.LLLLLL.LLLL.LLLL.LLLLLLLL.LL.LLLLLL
|
||||
L.LLLL.LLLLLLLLL.LL.LLLLLL.LL.L..LLLLLLLL.LLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLL..LLLLL..LLLLLLLL.L.L.LL
|
||||
LL.LLLLLLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLLLL.LLLLL.L.LLLLLLL.LLLLL.LLLLLL.LLLL.LLLLL..LLLLLLLLL.LLLLLL
|
||||
LLLLL..LLLLLLLLL.LLLLLLLLLLLLLLLLLL.LLLLL.LLLLLL.LLLLLLLLLLLLLL.LLL.LL.LLLL.LLLLLL.LLLLLLLLL.LLLLLL
|
||||
LL.LLL.LLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLL.L.LLLLLL.LLLLL.LLLLLL.LLLLLLLLLLL.LLLLLLLLL.LLLLLL
|
||||
L.L.....LL........L..L....L.....LLL.L.L.L........L.........L........L..L..L..L.....L....LLL..L..LL.
|
||||
L.LLLL.LLL.LLLLLLL.LLLLLLL.LLLL.LLLLLLLLL.LLLLLL.LLLLLLL..LLLLL.LLLLLLLLLLLLLLLLL..LLLLLLL.L.LLLLLL
|
||||
LLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLLLLLLLL.L.LLLLLL.LLLL.LLLLLL.LLLLLLLLLLLLLLLL
|
||||
LLLLLL.LLLLLLLLL.LLLLLLLLLL.LLLLLLLLLLLL.LLLLLLLLLLLLLLL...LLLL.LLLLLL.LLLLLLLLLLL.LLLLLLLLL.LLLLLL
|
||||
LLLL.L.LL.L.LLLL.LLLLLLLLL.LLLL.LLLLLLLLL.LLLLLL.LLLLLLLL.LLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLL.L.L.LLLL
|
||||
LL.L.L.L..L..L..L....L....L.L.LLL.L.LLL.......L..LL.....LLL......L.L.L.L..L.LLL...L.......L........
|
||||
LLLLLL.LLLLLLLLL.LLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLL.LLLLLL.LLLL.LLLLLL.LLLLLLLLL.LLLLLL
|
||||
LLLLLL.LLLLLLLLL.LL.LLLLLLLLLLLLLLL..LLLL.LLLLLL.LLLLLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLLL
|
||||
LLLLLL.LLLLLLL.L.L.LLLLLLL.LLLL.LLLLLLLLL.LLLLLLLLLLLL.LL.LLLLL.LLLLLL.LLLL.LLLLLLLLLLLLLLLLLLLLLLL
|
||||
LLLLLLLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLLLL.LLLLLL.LLLLL..LLLLLLLLLL.LLL.LLLL..LLLLL.LLLLLLL.LL.LLLLL
|
||||
LLLLLLLLLLLLLLLL.LLLL.LLLL.LLLLLLL.LLLLLL.LLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLL.LLLLLLLLLLLLLLLLLLLLLLL
|
||||
10
2020/inputs/day11-test1
Normal file
10
2020/inputs/day11-test1
Normal file
|
|
@ -0,0 +1,10 @@
|
|||
L.LL.LL.LL
|
||||
LLLLLLL.LL
|
||||
L.L.L..L..
|
||||
LLLL.LL.LL
|
||||
L.LL.LL.LL
|
||||
L.LLLLL.LL
|
||||
..L.L.....
|
||||
LLLLLLLLLL
|
||||
L.LLLLLL.L
|
||||
L.LLLLL.LL
|
||||
29
2020/test_day11_game.py
Normal file
29
2020/test_day11_game.py
Normal file
|
|
@ -0,0 +1,29 @@
|
|||
import pytest
|
||||
|
||||
from day11_seating import SeatMap
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def simple_map():
|
||||
return """L.L
|
||||
L.L
|
||||
.LL
|
||||
"""
|
||||
|
||||
|
||||
def test_adjacent_cells_center_simple_map(simple_map):
|
||||
seat_map = SeatMap(simple_map)
|
||||
adjacent = list(seat_map._visible_seats((1, 1)))
|
||||
assert adjacent == ["L", ".", "L", "L", "L", ".", "L", "L"]
|
||||
|
||||
|
||||
def test_adjacent_cells_left_border_simple_map(simple_map):
|
||||
seat_map = SeatMap(simple_map)
|
||||
adjacent = list(seat_map._visible_seats((1, 0)))
|
||||
assert adjacent == ["L", ".", ".", "L", "."]
|
||||
|
||||
|
||||
def test_adjacent_cells_top_left_corner_simple_map(simple_map):
|
||||
seat_map = SeatMap(simple_map)
|
||||
adjacent = list(seat_map._visible_seats((0, 0)))
|
||||
assert adjacent == [".", ".", "L"]
|
||||
Loading…
Reference in a new issue