73 lines
1.8 KiB
Python
73 lines
1.8 KiB
Python
|
|
initialState = []
|
|
with open("input.txt", "r") as f:
|
|
initialState = f.read().splitlines()
|
|
|
|
stateWidth = len(initialState[0])
|
|
stateHeight = len(initialState)
|
|
|
|
def areSeatsOccupied(state: list, x, y, dx, dy):
|
|
while True:
|
|
x += dx
|
|
y += dy
|
|
if x < 0 or x >= stateWidth or y < 0 or y >= stateHeight:
|
|
return False
|
|
if state[y][x] == "L":
|
|
return False
|
|
if state[y][x] == "#":
|
|
return True
|
|
|
|
def getNumOfAdjecentOccupiedSeats(state: list, x, y):
|
|
return areSeatsOccupied(state, x, y, -1, -1) \
|
|
+ areSeatsOccupied(state, x, y, 0, -1) \
|
|
+ areSeatsOccupied(state, x, y, +1, -1) \
|
|
+ areSeatsOccupied(state, x, y, -1, 0) \
|
|
+ areSeatsOccupied(state, x, y, +1, 0) \
|
|
+ areSeatsOccupied(state, x, y, -1, +1) \
|
|
+ areSeatsOccupied(state, x, y, 0, +1) \
|
|
+ areSeatsOccupied(state, x, y, +1, +1)
|
|
|
|
def computeNextState(state: list):
|
|
nexState = state.copy()
|
|
for y in range(stateHeight):
|
|
newLine = []
|
|
for x in range(stateWidth):
|
|
if state[y][x] == ".":
|
|
newLine.append(".")
|
|
elif state[y][x] == "L":
|
|
occupiedSeats = getNumOfAdjecentOccupiedSeats(state, x, y)
|
|
if occupiedSeats == 0:
|
|
newLine.append("#")
|
|
else:
|
|
newLine.append("L")
|
|
else: # if x == "#"
|
|
occupiedSeats = getNumOfAdjecentOccupiedSeats(state, x, y)
|
|
if occupiedSeats >= 5:
|
|
newLine.append("L")
|
|
else:
|
|
newLine.append("#")
|
|
nexState[y] = "".join(newLine)
|
|
|
|
return nexState
|
|
|
|
def getNumOfOccupiedSeats(state: list):
|
|
count = 0
|
|
for line in state:
|
|
count += line.count("#")
|
|
return count
|
|
|
|
def printState(state: list):
|
|
print("---------------")
|
|
for line in state:
|
|
print(line)
|
|
|
|
lastState = initialState
|
|
currentState = initialState
|
|
while True:
|
|
lastState = currentState
|
|
currentState = computeNextState(currentState)
|
|
if currentState == lastState:
|
|
break
|
|
|
|
print(getNumOfOccupiedSeats(currentState))
|