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day11.py
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#!/usr/bin/env python3
import pytest
input_list = []
input_2darray = []
with open('day11.txt', 'r') as f:
strings = f.read().splitlines()
for item in strings:
if item:
input_list.append(item)
input_2darray.append([x for x in item])
example = []
example_2darray = []
with open('example_day11.txt', 'r') as f:
strings = f.read().splitlines()
for item in strings:
if item:
example.append(item)
example_2darray.append([x for x in item])
# EXAMPLES
example_it0 = ["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"]
example_it1 = ["#.##.##.##",
"#######.##",
"#.#.#..#..",
"####.##.##",
"#.##.##.##",
"#.#####.##",
"..#.#.....",
"##########",
"#.######.#",
"#.#####.##"]
example_it2 = ["#.LL.L#.##",
"#LLLLLL.L#",
"L.L.L..L..",
"#LLL.LL.L#",
"#.LL.LL.LL",
"#.LLLL#.##",
"..L.L.....",
"#LLLLLLLL#",
"#.LLLLLL.L",
"#.#LLLL.##"]
example_it3 = ["#.##.L#.##",
"#L###LL.L#",
"L.#.#..#..",
"#L##.##.L#",
"#.##.LL.LL",
"#.###L#.##",
"..#.#.....",
"#L######L#",
"#.LL###L.L",
"#.#L###.##"]
example_it4 = ["#.#L.L#.##",
"#LLL#LL.L#",
"L.L.L..#..",
"#LLL.##.L#",
"#.LL.LL.LL",
"#.LL#L#.##",
"..L.L.....",
"#L#LLLL#L#",
"#.LLLLLL.L",
"#.#L#L#.##"]
example_it5 = ["#.#L.L#.##",
"#LLL#LL.L#",
"L.#.L..#..",
"#L##.##.L#",
"#.#L.LL.LL",
"#.#L#L#.##",
"..L.L.....",
"#L#L##L#L#",
"#.LLLLLL.L",
"#.#L#L#.##"]
example_final = ["#.#L.L#.##",
"#LLL#LL.L#",
"L.#.L..#..",
"#L##.##.L#",
"#.#L.LL.LL",
"#.#L#L#.##",
"..L.L.....",
"#L#L##L#L#",
"#.LLLLLL.L",
"#.#L#L#.##"]
def print_grid(grid):
print("\n".join(grid))
print("\n")
@pytest.mark.parametrize("subgrid, new_seat", [
(["LLL", "L.L", "LLL"], "."),
(["LLL", "LLL", "L.L"], "#"),
(["#LL", "L#L", "##L"], "#"), # 3
(["#L#", "L#L", "##L"], "L"), # 4
(["###", "L#L", "##L"], "L"), # 5
])
def test_process_seat(subgrid, new_seat):
print(subgrid)
print_grid(subgrid)
assert process_seat(subgrid) == new_seat
def pad_with_floor(grid):
new_grid = []
new_grid.insert(0, "." * (len(grid[0]) + 2))
for row in grid:
new_row = "." + row + "."
new_grid.append(new_row)
new_grid.append("." * (len(grid[0]) + 2))
assert (len(grid) + 2) == len(new_grid)
assert (len(grid[0]) + 2) == len(new_grid[1])
return new_grid
def pad_2d_with_floor(array):
new_array = []
new_array.insert(0, list("." * (len(array[0]) + 2)))
for row in array:
new_row = row[:]
new_row.append(".")
new_row.insert(0, ".")
new_array.append(new_row)
new_array.append(list("." * (len(array[0]) + 2)))
return new_array
def process_seat(subgrid):
"""3x3 grid
if seat is empty, and no occupied seats adjacent, it becomes occupied
if a seat is occupied, and 4 or more seats adjacent are occupied, the seat becomes empty
otherwise, no change
"""
assert len(subgrid) == 3
assert len(subgrid[0]) == 3
assert len(subgrid[1]) == 3
assert len(subgrid[2]) == 3
seat = subgrid[1][1]
adjacent_seats = subgrid[0] + subgrid[1][0] + subgrid[1][2] + subgrid[2]
if seat == ".":
return "."
elif seat == "L":
if "#" not in adjacent_seats:
return "#"
elif seat == "#":
if adjacent_seats.count("#") >= 4:
return "L"
return seat
part2_example = [
[".","#","#",".","#","#","."], # basic example w/ none found
["#",".","#",".","#",".","#"],
["#","#",".",".",".","#","#"],
[".",".",".","L",".",".","."],
["#","#",".",".",".","#","#"],
["#",".","#",".","#",".","#"],
[".","#","#",".","#","#","."]]
part2_example2 = [
[".",".",".",".",".",".",".",".",".",".",".",".","."],
[".","L",".","L",".","#",".","#",".","#",".","#","."], # only "sees" one
[".",".",".",".",".",".",".",".",".",".",".",".","."]]
part2_example_diag1 = [["#",".","#"],
[".","L","."],
["#",".","#"]]
part2_example_diag2 = [["#",".","#"],
[".","#","."],
["#",".","#"]] # 4 -> stays filled
part2_example_diag3 = [["#",".","#"],
[".","#","."],
["#","#","#"]] # 5 -> goes to empty
def process_seat_part2(i, j, grid):
max_y = len(grid) - 1
max_x = len(grid[0]) - 1
seat = grid[i][j]
# print("seat: {}".format(seat))
if seat == ".":
return ".", 0
else:
count = 0
idx = j-1
while idx >= 0: # LEFT
if grid[i][idx] == "#":
count += 1
break
elif grid[i][idx] == "L":
break
idx = idx - 1
idx = j+1
while idx <= max_x: # RIGHT
if grid[i][idx] == "#":
count += 1
break
elif grid[i][idx] == "L":
break
idx = idx + 1
idx = i-1
while idx >= 0: # UP
if grid[idx][j] == "#":
count += 1
break
elif grid[idx][j] == "L":
break
idx = idx - 1
idx = i+1
while idx <= max_y: # DOWN
if grid[idx][j] == "#":
count += 1
break
elif grid[idx][j] == "L":
break
idx += 1
idx = j-1
idy = i-1
while idx >= 0 and idy >= 0: # UP-LEFT
if grid[idy][idx] == "#":
count += 1
break
elif grid[idy][idx] == "L":
break
idx = idx-1
idy = idy-1
idx = j+1
idy = i-1
while idx <= max_x and idy >= 0: # UP-RIGHT
if grid[idy][idx] == "#":
count += 1
break
elif grid[idy][idx] == "L":
break
idx = idx+1
idy = idy-1
idx = j-1
idy = i+1
while idx >= 0 and idy <= max_y: # DOWN-LEFT
if grid[idy][idx] == "#":
count += 1
break
elif grid[idy][idx] == "L":
break
idx = idx-1
idy = idy+1
idx = j+1
idy = i+1
while idx <= max_x and idy <= max_y: # DOWN-RIGHT
if grid[idy][idx] == "#":
count += 1
break
elif grid[idy][idx] == "L":
break
idx = idx+1
idy = idy+1
if seat == "L" and count == 0:
return "#", count
elif seat == "#" and count >= 5:
return "L", count
else:
return seat, count
part2_it0 = [
["L",".","L","L",".","L","L",".","L","L"],
["L","L","L","L","L","L","L",".","L","L"],
["L",".","L",".","L",".",".","L",".","."],
["L","L","L","L",".","L","L",".","L","L"],
["L",".","L","L",".","L","L",".","L","L"],
["L",".","L","L","L","L","L",".","L","L"],
[".",".","L",".","L",".",".",".",".","."],
["L","L","L","L","L","L","L","L","L","L"],
["L",".","L","L","L","L","L","L",".","L"],
["L",".","L","L","L","L","L",".","L","L"],
]
part2_it1 = [
["#",".","#","#",".","#","#",".","#","#"],
["#","#","#","#","#","#","#",".","#","#"],
["#",".","#",".","#",".",".","#",".","."],
["#","#","#","#",".","#","#",".","#","#"],
["#",".","#","#",".","#","#",".","#","#"],
["#",".","#","#","#","#","#",".","#","#"],
[".",".","#",".","#",".",".",".",".","."],
["#","#","#","#","#","#","#","#","#","#"],
["#",".","#","#","#","#","#","#",".","#"],
["#",".","#","#","#","#","#",".","#","#"],
]
part2_it2 = [
["#",".","L","L",".","L","L",".","L","#"],
["#","L","L","L","L","L","L",".","L","L"],
["L",".","L",".","L",".",".","L",".","."],
["L","L","L","L",".","L","L",".","L","L"],
["L",".","L","L",".","L","L",".","L","L"],
["L",".","L","L","L","L","L",".","L","L"],
[".",".","L",".","L",".",".",".",".","."],
["L","L","L","L","L","L","L","L","L","#"],
["#",".","L","L","L","L","L","L",".","L"],
["#",".","L","L","L","L","L",".","L","#"],
]
part2_it3 = [
["#",".","L","#",".","#","#",".","L","#"],
["#","L","#","#","#","#","#",".","L","L"],
["L",".","#",".","#",".",".","#",".","."],
["#","#","L","#",".","#","#",".","#","#"],
["#",".","#","#",".","#","L",".","#","#"],
["#",".","#","#","#","#","#",".","#","L"],
[".",".","#",".","#",".",".",".",".","."],
["L","L","L","#","#","#","#","L","L","#"],
["#",".","L","#","#","#","#","#",".","L"],
["#",".","L","#","#","#","#",".","L","#"],
]
part2_it4 = [
["#",".","L","#",".","L","#",".","L","#"],
["#","L","L","L","L","L","L",".","L","L"],
["L",".","L",".","L",".",".","#",".","."],
["#","#","L","L",".","L","L",".","L","#"],
["L",".","L","L",".","L","L",".","L","#"],
["#",".","L","L","L","L","L",".","L","L"],
[".",".","L",".","L",".",".",".",".","."],
["L","L","L","L","L","L","L","L","L","#"],
["#",".","L","L","L","L","L","#",".","L"],
["#",".","L","#","L","L","#",".","L","#"],
]
part2_it5 = [
["#",".","L","#",".","L","#",".","L","#"],
["#","L","L","L","L","L","L",".","L","L"],
["L",".","L",".","L",".",".","#",".","."],
["#","#","L","#",".","#","L",".","L","#"],
["L",".","L","#",".","#","L",".","L","#"],
["#",".","L","#","#","#","#",".","L","L"],
[".",".","#",".","#",".",".",".",".","."],
["L","L","L","#","#","#","L","L","L","#"],
["#",".","L","L","L","L","L","#",".","L"],
["#",".","L","#","L","L","#",".","L","#"],
]
part2_it6 = [
["#",".","L","#",".","L","#",".","L","#"],
["#","L","L","L","L","L","L",".","L","L"],
["L",".","L",".","L",".",".","#",".","."],
["#","#","L","#",".","#","L",".","L","#"],
["L",".","L","#",".","L","L",".","L","#"],
["#",".","L","L","L","L","#",".","L","L"],
[".",".","#",".","L",".",".",".",".","."],
["L","L","L","#","#","#","L","L","L","#"],
["#",".","L","L","L","L","L","#",".","L"],
["#",".","L","#","L","L","#",".","L","#"],
]
@pytest.mark.parametrize("i, j, grid, exp_seat, exp_count", [
(0, 0, example_2darray, "#", 0),
(3, 3, part2_example, "#", 0),
(1, 1, part2_example2, "#", 0),
(1, 3, part2_example2, "L", 1),
(1, 1, part2_example_diag1, "L", 4),
(1, 1, part2_example_diag2, "#", 4),
(1, 1, part2_example_diag3, "L", 5),
(1, 2, pad_2d_with_floor(part2_it0), ".", 0),
(1, 5, pad_2d_with_floor(part2_it0), ".", 0),
(2, 6, pad_2d_with_floor(part2_it0), "#", 0)
])
def test_process_seat_part2(i, j, grid, exp_seat, exp_count):
returned, returned_count = process_seat_part2(i, j, grid)
assert returned == exp_seat
assert returned_count == exp_count
def process_grid_part2(current_grid):
input_grid = current_grid[:]
# current_grid is padded, iterate only on the seats
rows = len(input_grid) - 2
seats = len(input_grid[0]) - 2
single_row = list("."*len(input_grid[0]))
updated_grid = []
for x in range(0, len(input_grid)):
updated_grid.append(single_row)
# updated_grid = [("."*(len(input_grid[0])))] * (len(input_grid))
for row in range(1, rows+1):
new_row = ["."]
for seat in range(1, seats+1):
# same as part1 except need to pass whole grid
new_seat, _ = process_seat_part2(row, seat, input_grid)
new_row.append(new_seat)
new_row.append(".")
updated_grid[row] = new_row
return input_grid, updated_grid
def process_grid(current_grid):
print_grid(current_grid)
input_grid = current_grid[:]
print_grid(input_grid)
# current_grid is padded, iterate only on the seats
rows = len(input_grid) - 2
seats = len(input_grid[0]) - 2
updated_grid = [("."*(len(input_grid[0])))] * (len(input_grid))
for row in range(1, rows+1):
new_row = ""
for seat in range(1, seats+1):
new_row += process_seat([input_grid[row-1][seat-1:seat+2],
input_grid[row][seat-1:seat+2],
input_grid[row+1][seat-1:seat+2]])
updated_grid[row] = "." + new_row + "."
print_grid(updated_grid)
return input_grid, updated_grid
@pytest.mark.parametrize("input_grid, output_grid", [
(pad_with_floor(example_it0), pad_with_floor(example_it1)),
(pad_with_floor(example_it1), pad_with_floor(example_it2)),
(pad_with_floor(example_it2), pad_with_floor(example_it3)),
(pad_with_floor(example_it4), pad_with_floor(example_it5)),
(pad_with_floor(example_it5), pad_with_floor(example_final)),
])
def test_process_grid(input_grid, output_grid):
_, updated = process_grid(input_grid)
for idx, row in enumerate(updated):
assert row == output_grid[idx]
def test_part_one():
count, grid = part_one(example)
assert count == 37
assert grid == pad_with_floor(example_final)
def part_one(input_grid):
# pad grid with floor so it's possible to calculate edge seats!
current_grid = pad_with_floor(input_grid[:])
current, updated = process_grid(current_grid)
iterations = 1
while current != updated:
iterations += 1
current, updated = process_grid(updated)
final_grid = updated
all_seats = "".join(final_grid)
print("Part 1:")
print(iterations)
print(all_seats.count("#"))
return all_seats.count("#"), final_grid
def part_two(input_grid):
current_grid = pad_2d_with_floor(input_grid[:])
current, updated = process_grid_part2(current_grid)
iterations = 1
while current != updated:
iterations += 1
current, updated = process_grid_part2(updated)
final_grid = updated
for row in updated:
print(row)
print("Part 2:")
print(iterations)
count = 0
for row in final_grid:
for seat in row:
if seat == "#":
count += 1
print(count)
return count, final_grid
@pytest.mark.parametrize("input_grid, output_grid", [
(["#"], ["...", ".#.", "..."]),
(example_it0, ["............",
".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.",
"............"]),
])
def test_pad_with_floor(input_grid, output_grid):
output = pad_with_floor(input_grid)
for idx, row in enumerate(output_grid):
assert row == output[idx]
@pytest.mark.parametrize("input_grid, output_grid", [
(pad_2d_with_floor(part2_it0), pad_2d_with_floor(part2_it1)),
(pad_2d_with_floor(part2_it1), pad_2d_with_floor(part2_it2)),
(pad_2d_with_floor(part2_it2), pad_2d_with_floor(part2_it3)),
(pad_2d_with_floor(part2_it3), pad_2d_with_floor(part2_it4)),
(pad_2d_with_floor(part2_it4), pad_2d_with_floor(part2_it5)),
(pad_2d_with_floor(part2_it5), pad_2d_with_floor(part2_it6)),
])
def test_process_grid_part2(input_grid, output_grid):
print("\n")
for row in input_grid:
print(row)
print("\n")
x, updated = process_grid_part2(input_grid)
assert x == input_grid
for idx, row in enumerate(updated):
assert row == output_grid[idx]
if __name__ == "__main__":
part_one(input_list)
part_two(input_2darray)