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11
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parent
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solutions/11/README.md
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12
solutions/11/README.md
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# 11
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Today: Game of life, but a bit different :)
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I lost so much time because I missed that in the second part we now require 5 instead of 4 occupied seats 😩
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<details>
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<summary>Solutions</summary>
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<ol>
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<li>2296</li>
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<li>2089</li>
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</ol>
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</details>
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solutions/11/data.txt
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solutions/11/data.txt
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LLLLLLLLLLL.LLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL.LLLLLLLLL.LLL.LLLLLLLLLL.LLLLLLL.LLLLLLLLLLLLLLLLLLL
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LLLLLL.LLLL.LLLLL.LLLL.LLLLLLL.LLLLLLL.LLLLL.LLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLL
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LLLLLL.LLLL.LLLLL.LLLLLLLLLLLLLLLLLLLL..LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL.LLLLL.LLLLLLLLLLLLL
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.L..LLL...L....LLLL.L..L...............LLLLLL..LL.L.....L.....L.L.L.L.L...LLL.....L.L....LLL.LL..
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LLLLLL.LLLLLLLLLL.LLLLLLLLLLL.LLLLLLLLLLLLLL.LLLLLLLLL.LLLLLLLL.LLLLL.LLLLLLL.LLLLL.LLLLLLLLLLLLL
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solutions/11/python/main.py
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from os.path import join, dirname
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from typing import List, Optional
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from itertools import product
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from copy import deepcopy
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TSeats = List[List[Optional[bool]]]
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mapping = {
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'.': None,
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'#': True,
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'L': False
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}
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inv = {v: k for k, v in mapping.items()}
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class Seats:
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p = [-1, 0, 1]
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def __init__(self, plan: str, alt: bool = False) -> None:
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self.seats: TSeats = [
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[
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mapping[seat]
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for seat in row
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]
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for row in plan.strip().split('\n')
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]
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self.max_x = len(self.seats[0])
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self.max_y = len(self.seats)
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self.alt = alt
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def __str__(self) -> str:
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return '\n'.join([
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''.join([inv[seat] for seat in row])
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for row in self.seats
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])
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def find_next_in_direction(self, y: int, x: int, dy: int, dx: int) -> Optional[bool]:
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y += dy
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x += dx
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while 0 <= x < self.max_x and 0 <= y < self.max_y:
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cur = self.seats[y][x]
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if cur is not None:
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return cur
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y += dy
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x += dx
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return None
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def get_occupied(self, y: int, x: int,) -> int:
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occupied = 0
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for dx, dy in product(self.p, self.p):
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if dx == 0 and dy == 0:
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continue
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if self.alt and self.find_next_in_direction(y, x, dy, dx) == True:
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occupied += 1
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else:
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dx += x
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dy += y
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if 0 <= dx < self.max_x and 0 <= dy < self.max_y and self.seats[dy][dx]:
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occupied += 1
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return occupied
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def iteration(self) -> int:
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changed = 0
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future: TSeats = deepcopy(self.seats)
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required_to_leave = 4 if self.alt else 3
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for y, x in product(range(self.max_y), range(self.max_x)):
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current = self.seats[y][x]
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if current == None:
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continue
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occupied = self.get_occupied(y, x)
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if (current == True and occupied > required_to_leave) or (current == False and occupied == 0):
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future[y][x] = not current
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changed += 1
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self.seats = future
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return changed
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def count_occupied(self) -> int:
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return sum([
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sum([
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1 if seat == True else 0
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for seat in row
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])
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for row in self.seats
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])
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def find_equilibrium(self) -> int:
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while self.iteration() > 0:
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pass
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return self.count_occupied()
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data = join(dirname(__file__), '../data.txt')
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with open(data) as f:
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txt = f.read()
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seats = Seats(txt)
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print(seats.find_equilibrium())
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seats = Seats(txt, True)
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print(seats.find_equilibrium())
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10
solutions/11/test.txt
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L.LL.LL.LL
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LLLLLLL.LL
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L.L.L..L..
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LLLL.LL.LL
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L.LL.LL.LL
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L.LLLLL.LL
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..L.L.....
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LLLLLLLLLL
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L.LLLLLL.L
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L.LLLLL.LL
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