add day 16 part 1

day16/code.py

@@ -0,0 +1,109 @@
+import sys
+sys.path.append('../aoclib')
+
+from aoclib import Input
+import heapq
+sys.setrecursionlimit(15000)
+
+L = '<'
+U = '^'
+R = '>'
+D = 'v'
+
+EMPTY = '.'
+WALL = '#'
+START = 'S'
+END = 'E'
+
+
+class Maze:
+    def __init__(self, lines: list[list[str]]):
+        self.grid = lines
+        for y in range(len(self.grid)):
+            for x in range(len(self.grid[0])):
+                if self.grid[y][x] == START:
+                    self.s = (x, y)
+                elif self.grid[y][x] == END:
+                    self.e = (x, y)
+
+    def __str__(self):
+        grid = [r.copy() for r in self.grid]
+        return '\n'.join(''.join(row) for row in grid)
+
+    def start(self) -> tuple[int, int]:
+        return self.s
+
+    def end(self, pos: tuple[int, int]) -> bool:
+        return self.e == pos
+
+    def is_wall(self, pos) -> bool:
+        x, y = pos
+        return self.grid[y][x] == WALL
+
+
+def search(m: Maze) -> int:
+    x, y = m.start()
+    state = (x, y, 1, 0)
+
+    queue = []
+    visited = set()
+    heapq.heappush(queue, (0, state))
+    visited.add(state)
+
+    while queue:
+        cost, state = heapq.heappop(queue)
+        x, y, xd, yd = state
+
+        if m.end((x, y)):
+            return cost
+
+        options = [
+            # move forward
+            (cost+1, (x+xd, y+yd, xd, yd)),
+            # turn
+            (cost+1000, (x, y, -yd, xd)),
+            (cost+1000, (x, y, yd, -xd)),
+        ]
+
+        for opt in options:
+            cost, state = opt
+            x, y, _, _ = state
+            if m.is_wall((x, y)):
+                continue
+            if state in visited:
+                continue
+            
+            visited.add(state)
+            heapq.heappush(queue, (cost, state))
+    return -1
+       
+def solve1(lines: list[list[str]]):
+    m = Maze(lines)
+    res = search(m)
+    return res
+
+
+def solve2(lines: list[list[str]]):
+    maze = Maze(lines)
+    return ''
+
+
+if __name__ == '__main__':
+    lines = Input('input_test.txt').lines_as_lists()
+    #part 1
+    print('test part 1:', solve1(lines))
+    #part 2
+    print('test part 2:', solve2(lines))
+
+    lines = Input('input_test2.txt').lines_as_lists()
+    #part 1
+    print('test 2 part 1:', solve1(lines))
+    #part 2
+    print('test 2 part 2:', solve2(lines))
+
+    lines = Input('input.txt').lines_as_lists()
+    #part 1
+    print('part 1:', solve1(lines)) # 90460
+
+    #part 2
+    print('part 2:', solve2(lines))

day16/input.txt

@@ -0,0 +1,141 @@
+#############################################################################################################################################
+#.......#...#.#.........................#.......#...#...........#...#.....#.............#.............#.......#.....#.....#................E#
+#.#####.#.#.#.#.#######.#####.###.#.#.#.#.#.###.#.#.#####.###.#.###.#.###.#.#.###.#####.#####.#######.#.#####.#.#.###.#.#.#######.###.#####.#
+#.....#...#.#.........................#.#.#.#.#...#.......#.....#...#.#.#...#.....#...#.............#...#...#...#.....#.#...#...#.........#.#
+#.###.#####.#######.#####.#.###.#######.#.#.#.#############.#.###.###.#.#####.#######.#######.#####.#.###.#.#####.#####.###.#.#.#.#.#.###.#.#
+#.#.#...#.#.........#.....#...#.#.......#.#.#.#...#.....#...#.....#...#.....#...#.......#...#.................#.........#.#...#.#.#...#...#.#
+#.#.###.#.###########.#######.#.#.#######.#.#.#.#.#.###.#.###.###.#.###.###.#.#.#.#####.#.#.#.#.#.#.###.#####.#.#.#######.#####.#.###.#####.#
+#.#...#.#.........#.....#...#...#...#.......#.#.#.#...#.#.#...#...#.#.....#...#.#.....#...#.#.#.#.#...#.....#.................#...#...#.....#
+#.#.###.#######.###.###.#.#.#######.#.###.###.#.#.#.###.#.###.#####.#.#.#.###.#.#.###.#####.#.#.#.###.#####.#.#.#.#.#.###.###.#####.#.#.#####
+#.#...#.....#...#...#.#...#.......#.#.#.....#...#.#.#...#...#.....#.......#...#.#...#.....#.....#.#.#.#.....#.#.#.#.#.#...#.#...#.....#.#...#
+#.###.#####.#.#.#.###.#####.#.#####.#.#.###.#.###.#.#.#####.#.###.#####.###.#.#.###.#####.#######.#.#.#.#####.#.#.###.#.###.#.###.###.#.###.#
+#.#...#.#...#.#.#.........#.#.#.....#.....#.#...#.................................#.#...#.#...#...#.#.#...#.#...#.#...#.#...#.#...#.#.#.#...#
+#.#.#.#.#.###.#######.#####.#.#.###########.#########.#.#####.#.#.###.#.#####.#.#.#.#.#.#.###.#.###.#.###.#.#####.#.###.#.#.#.#.###.#.#.#.###
+#...#...#...#.........#.....#.#...#...#.....#...................#.............#.#.#.#.#.#...#.#.#...#.....#...........................#.#...#
+#.#####.###.#.#########.#####.###.#.#.#.#####.#####.#######.#.#.#######.#####.#.#.#.#.#.###.#.#.###.#######.#######.#.#.#.###.###.#.#.#.###.#
+#.....#.#.#.#.#...#...#.#.......#...#.#...........#.#.......#.#...........#.....#.#.#.#.#...#.........#.....#.......#.#.#.#.....#.#.#...#...#
+#.###.#.#.#.###.#.#.#.#.#.###########.#########.###.#.#######.###########.#.#####.#.###.#.###.#####.###.###.#.#######.#.#.#.#####.#.#.###.###
+#...............#.#.#...#...#.......#.........#.#.....#...#...........#...#.#.....#.#...#...#.#...#.#...#.#...#.......#.#.....#...#...#.....#
+#.#.#####.#######.#.#####.###.###.#.#########.###.###.#.#.#.###.#######.###.###.###.#.#####.###.#.###.#.#.#######.###.#.#####.#.#####.#.#.#.#
+#.#.....#.....#...#...#...#.....#.#.#.......#.....#...#.#.#.....#.......#...........#...........#.#...#...........#...#.....#.#.#.....#.#...#
+#.#####.###.###.#####.#.###.#.###.#.###.###.#######.###.#.#####.#.#######.###.#.#########.#######.#.###.#####.#.###.#######.###.#.#####.#.###
+#.#...#...#.#...#.....#...#.#.....#.....#.#...#.....#...#.......#...#...#.#...#...........#...#...#.#...#...#.#.#.........#.....#...#...#...#
+#.#.#.###.###.#####.#######.#.###########.###.#.###.#########.#####.###.#.#.#########.###.#.###.###.#####.#.#.#.#.#######.#######.#.#.###.#.#
+#...#.#...........#...#.....#.................#...#.........#.....#...#...........#...#...#...#...........#.#.#.#.#.....#.#...#.#.#.#...#...#
+#.###.#.###.###.#.#.#.#.#.#############.###.#####.#########.#########.###.#######.###.#.#####.#############.###.###.###.#.#.#.#.#.#.###.#.#.#
+#...#.#...#...#.#.#.#.............#...#...#.#...#...#.....#.........#...#.......#...#...#.....#...#...#.....#...#...#...#...#.#...#.#...#.#.#
+#.#.#.#.#.###.#.#.#####.#.#######.###.###.###.#.###.#.#######.#####.###.#####.#####.###.#.###.#.#.#.#.#.#####.#.#.###.#######.#.###.#.###.#.#
+#...#.#.#.#...#.#.....#...#...#.....#.....#...#...#.#.#.....#.....#...#.....#.#...#...#.#.#...#.#...#...#.........#.#.#.....#.#...#...#.#.#.#
+#.#.#.###.#.###.#####.#.###.#.#####.#.#.#.#.###.###.#.#.###.#####.#.#.#####.###.#.#.#.#.#.#####.#####.#.#.###.###.#.#.###.###.#####.#.#.#.#.#
+#...#...#...#...#.#...#.#...#...#.#...#.#.#.#...#...#.#...#.........#.#.....#...#.....#...#...#...#...#.#...#...#.#.....#.........#.#...#.#.#
+#.#####.#.#####.#.#.#####.#####.#.#.###.###.#.#.#.###.###.#########.###.#####.#########.###.#.###.#.###.###.###.#.#####.#########.#.#.#.#.#.#
+#...#...#.....#...#.#.....#.....#.#.#...#...#.....#...#.#.#.........#.......#.....#.....#...#...#.#.#.#...#.#.......#.#.....#...............#
+#.#.#.###.###.###.#.#.#####.#.#.#.#.#.###.#########.#.#.#.#.#########.###.#.#.###.#######.#####.#.#.#.###.#.#.#.###.#.#####.#.#.###.#.#.#.#.#
+#.#.#...#.....#...#.#.#.....#...#...#...#.........#.#...#.#.#.....#...#...#.....#...#...#.#.......#.#.....#.#.#.....#...#...#.#.#.#.#.#.#.#.#
+#.#.###.#.#####.###.#.#.###########.###.#########.#.#.###.#.#.#.###.###.###########.#.#.#.#########.#####.###.#.#####.###.###.#.#.#.#.###.#.#
+#...#...............#.#...............#.......#...#.#.#...#...#.........#.........#...#.#.....#.........#.....#...#...#...#...#.#.....#...#.#
+#.###.###.#.#.###.###.###########.###########.#.###.#.#.#######.###.#.###.#######.#####.#####.#.#######.#.#######.#.###.###.###.#####.#.#####
+#.#.#.#...#...#...#...#.......#...#.....#.....#.....#.#.........#...#.#.#.#.....#...........#.......#...#.#.....#.#.#...#.....#...#...#.....#
+#.#.#.#.#.#.###.###.###.#####.#.###.###.#.###########.###########.###.#.#.#####.#####.#########.###.#.#####.###.#.#.#.###.###.###.#.#.###.#.#
+#...#.#.#.#.#...#...#...#...#.#.....#...#.#.........#.#.#.....#.#.....#.#.......#.....#...#...#.....#.......#.#...#.#.#.#.#...#.#...#...#.#.#
+#####.#.#.#.#.###.###.#####.#.#####.#.###.#.#######.#.#.#.#.#.#.#.#####.###.#.#.#.#####.#.#.#.###.###########.#####.#.#.#.#.#.#.#######.###.#
+#.....#.#.#.#.......#.#.....#.#...#.#.#...#.......#.#.#...#.#.#.......#...#.#.#.#.....#.#...#...#.#.....#...........#.#...#.#...............#
+#.#####.#.#.#########.#.#.###.#.#.###.###.#.#######.#.#.###.#.#######.#.#.#.#.#######.#.#####.#.#.#.###.###.#####.###.#####.###.###.#.#.#.#.#
+#.#...#.#...#.#.......#.#...#.#.#.#...#...#.#...#...#.#...#.#.......#...#.#.#.#.......#...#...#.#.#.#.......#...#.#...#.....#.#...#.#.#.....#
+#.#.###.#.###.#.#######.#.#.#.#.#.#.###.###.#.#.#.###.###.#.#######.###.###.#.#.#########.###.#.#.#.###.###.#.#.###.###.#####.###.###.#####.#
+#.#.....#.....#...#...#...#.#...#...#...#...#.#.#...........#.....#...#.#...#...#.......#...#.....#...#.....#.#.....#...#.............#...#.#
+#.#.#####.#######.#.###.###.#.#######.###.###.#.#############.#######.###.###.###.#####.###.#######.#.#.#####.#########.#.###########.#.#.#.#
+#.#...............#...#...#.....#...........#.#...#.....#...#.........#...#.#...#...#.....#...#...#...#...#...#.#.......#.#.....#...#.#.#.#.#
+#.#######.#########.#.#.###.#####.###########.#.#.#.###.#.#.#.#########.###.###.#####.#####.#.#.#.#.#.#####.###.#.#.#####.#.###.###.#.#.#.#.#
+#.........#.......#.#...#...#.....#...#.....#...#...#...#.#.#.......#...#...#...#.....#.......#.#.#.#.....#...#.#.#.....#.#.#.#...#.....#.#.#
+#.###.###.#.#.###.#.###.#.###.#####.#.#.###.###.#####.###.#.#####.#.#.###.###.###.#####.#####.#.###.#####.###.#.#.#####.###.#.###.###.#####.#
+#.#...#.........#.#.....#...........#.#.#.......#.....#...#.........#...#.........#.....#...#.......#...#...#.#.#...#...#.......#...#.#.....#
+#.#.#.#.#######.#.#.#######.#####.###.#.###########.#########.#.#######.#.#########.#####.###.#########.###.#.#.###.#.###.#######.#.###.#####
+#.#.#...#.....#.#.#.#.....#.....#...#.#...........#.........#.............#.........#.#.......#.......#...#...#.....#.#...#.........#...#...#
+#.#.#.###.###.#.###.#.###.#####.#####.###########.#####.###.###.#.#########.#########.#.#########.#.#.#.#.#####.#####.#.###.#####.#.#.#####.#
+#.#.#...#.#...#.....#.#.#.#...#...#.....#.#...#...#...#...#.......#.......#.#...#.......#.......#.#.#...#.#...#.#.....#.#...#.....#.#.#...#.#
+#.#.#.#.#.#.#########.#.#.#.#.###.#.###.#.#.#.#.###.#.###.###.#.###.#####.#.#.#.#.#.#####.#.###.###.#####.###.#.#.#####.#.###.#.#.#.#.#.#.#.#
+#.....#...#.............#...#...#...#.....#.#.#.#...#...#...#.#...#.#.......#.#.#...#...#.#...#...#.....#...#...#.....#.#...#.#...#.#...#...#
+#####.#########################.#######.###.#.#.#.#####.#.#.#.#####.#####.###.#.#.#####.#.###.###.#####.###.#.#######.#.###.###.#.#.#######.#
+#...#.#.......#...#.............#.....#.#...#.#.......#.#.#.......#.....#.#...#.......#...#.#.#...#...#...#.#.#.....#.#.#.#...#.#.#.#.....#.#
+#.#.#.#.#.###.###.#.#####.#####.#.###.#.#.###.#########.#####.###.#.###.###.###.#####.###.#.#.###.#.#.###.#.#.#.###.#.#.#.###.###.#.#####.#.#
+#.#.#.#.#...#...#.#.#...#.#...#.#.#...#.#.#.......#...#.#...#.#...#...#.......#...#.#...#...#...#.#.#.#...#.#.#.#...#.#.#...#...#...#.....#.#
+#.#.#.#####.###.#.#.#.#.#.#.#.###.#.#####.#######.#.#.#.#.#.#.#.#####.###########.#.###.#.#####.#.#.#.#.###.###.#.###.#.#.#####.###.#.#####.#
+#.#.#.#.....#.....#...#...#.#...#.#.....#...#...#...#.#...#.#.#.....#...#...#.....#...#.#.#.....#...#...#...#...#.#...#.#.#.......#...#.....#
+#.#.#.#.#.#######.#####.#.#.###.#.#####.###.#.#.#.###.#####.#.#####.#.#.###.#.#####.###.###.#############.###.###.#.#.#.#.#.#.###.#.###.#####
+#.#.....#.#...#.......#.#.#...#...#...#.....#.#.#.....#...........#...#.....#...#.....#.....#.....#.#.....#...#.#.#.#...#.#.#...#.#.....#...#
+#.###.#####.#.#########.#####.#####.#.#######.###.#####.#####.#.#####.#####.#.#.#####.#######.###.#.#.#####.###.#.#.#####.#.###.#.#.###.#.#.#
+#.....#.....#...........#.....#.#...#.........#...#.....#...#.#.....#...#.....#.#.....#.........#.#.#.......#.#...#...#...#...#...#...#...#.#
+#####.#.#.#############.#.#####.#.#######.###.#.#####.###.###.#####.###.#####.#.#.###.#########.#.#.#########.#.#####.###.#.#.#######.#.#.###
+#.......#.#.......#.....#.#.........#...#.#.#.#.#.....#.....#.....#.........#.#.#...#.....#.....#.....#.....#.#.#.....#.....#.......#...#...#
+#.#####.#.#.#####.#####.#.#########.#.#.#.#.#.#.#.#.#####.#.#####.#########.###.#.#.#####.#.#########.#.###.#.#.#.#####.###.#####.#####.###.#
+#.#...............#...#.#.......#.....#.#.#.#.#.#.#.#...#.#...#...#.....#.......#.#.#...#...#...#...#...#.#.#.#.#.#.....#...#...#.....#.....#
+#.###.#.#.#.###.###.#.#########.#######.#.#.#.#.#.#.#.#.###.###.###.#############.#.#.#.#####.#.#.#.#####.#.#.#.#.#.###.#.#####.#####.#.###.#
+#.......#.#.#...#...#.........#...#...#.#.#...#.#.#...#...#.#...#...#.......#...#.#.#.#.....#.#...#.......#...#.#.#...#.#.........#.........#
+#.#####.#.#.#.#.#.#####.#.#.#####.#.#.#.#.#####.#.#######.#.#.###.#.#.#####.###.#.#.###.###.#.###########.###.#.#.#####.#########.#.###.#.#.#
+#.#.....#.#.#.....#.....#.#.....#...#.#.#...........#.....#.......#...#.#...#...#.#...#.....#...#.......#.......#...#...#.............#...#.#
+#.#.#######.#.#####.###.#.#####.#.###.#####.#########.###.#############.#.###.#.#.###.#.#######.#.#####.#######.###.#.#.#####.#########.#.#.#
+#.#...#.....#.......#.....#.......#...#...#.......#...#...#...#.......#...#...#.#.....#...#.....#.#...#...#...#...#.#.#.#...#.....#.....#.#.#
+#####.#.#####.#######.###.#.#.#.#.#.###.#.#######.#.###.###.#.#.#####.#.###.#.#.###.#.###.#.#####.###.###.#.#.###.#.#.###.#.#####.#.###.###.#
+#.....#.#.....#...#.....#.#.....#.#.#...#.......#...#.#.....#...#.#...#.#...#...#...#.#...#.#...#...#.#...#.#.....#.#.....#...#...#...#.....#
+#.###.#.#.###.###.#.###.#.#####.###.#.#########.#####.#.###.#####.#.#.#.#####.#.#.###.#.###.#.#.###.#.#.###.#.#####.#.#######.#.#####.#.#####
+#...#.#.#...#...#...#...#...#...#...#.#...#...#.#.......#...#.....#.#.#.#.....#.#.#...#.......#.#.#.#.#.....#...#...#.......#.#.#...........#
+#.#.###.###.#.#.#####.###.###.###.#.#.#.#.#.#.#.#.#######.###.###.#.###.#.#######.#.###########.#.#.#.#######.###.#########.#.#.###.###.#.#.#
+#.#...#.#...#.#.#...#.#...#...#...#.#.#.#.#.#.#.#.#.......#.#...#.#...#.#.#.......#...........#...#.#...........#.#...#.....#.#...#.......#.#
+#####.#.#.###.#.#.#.#.#.###.#.#.#####.#.#.#.#.#.###.#######.###.#.###.#.#.#.#########.#######.#.###.#######.###.#.#.#.#####.#.###.###.#.###.#
+#.....#...#...#...#...#.#.#.#.#.....#.#.#...#.#.....#.........#.#...#.#.#.....#.............#.#.#...#.....#...#.....#.....#.#.#.#.....#.....#
+#.#########.#.#########.#.#.#.###.#.#.#####.#.#######.###.#.###.#.###.#.#####.#.#######.#####.###.###.###.###############.###.#.###.###.###.#
+#...#.....................#.#.#.....#...#.....#.....#.#...#.#...#.........#...#.#.....#.#.....#...#...#.#.#.......#...#.....#.#...#...#.....#
+#.#.#.#######.#####.#######.#.#.###.###.#.###.###.###.#.#.#.#.###.#.#####.#.###.#.#####.#.#.###.#.#.###.#.#.###.#.#.#.#####.#.#.#.###.#.###.#
+#.#.#.#...........#.........#.#.#...#...#.#.......#...#.#.#...#.#.#.......#.....#.........#.#...#...#...#...#...#...#.#...#...#.#.#...#.#...#
+#.#.#.#.#####.#.#.#.#########.#.#####.###.#######.#.###.#.#####.#.#################.#####.###.#####.#.#.#####.#######.#.#.#######.#.#####.#.#
+#.#...#.#.......#.#...#.......#.......#.......#...#.....#.......#.#...............#.#.........#.....#.#.#...#.......#.#.#.......#.......#.#.#
+#.#######.###.#######.###.#####.#.#####.#####.#####.#############.#.#####.#######.###.###.#.#####.###.#.#.#.#.###.#.#.#.#.#####.###.###.#.#.#
+#.....#...#.........#...#...#...#...#...#...#.......#.....#.......#...#...#...........#...#.......#...#...#...#.#.#.#.#.......#...#.....#.#.#
+#####.#.###.#.#####.###.#####.#####.#.###.#.#########.###.#.#.#######.#.###.#######.#######.#######.###########.#.###.#.#####.###.#.#####.#.#
+#...#.#...#.#.....#.....#...........#.#...#...#.....#...#...#.#.....#...#...#...#...#.............#.#...........#.....#...#.......#...#...#.#
+#.###.###.#.#.###.#####.#.#.#.#######.#######.#.###.###.#####.#.#.#.#.#.#####.#.#.###.#####.#.#####.###.#.#.###.#######.###.###.#####.###.#.#
+#.................#...#.#.#.........#.#.....#.....#...#.....#.#...#...#.....#.#.#.#...#...#.#.#.......#.#.#.#.#.#.......#...#.#...#...#.....#
+#.#######.#.#.#####.#.#.#.#####.#####.#.###.#######.#.#####.#####.#########.#.#.#.#.#####.#.###.#.###.#.#.#.#.#.#.#####.#.###.###.#.###.#.#.#
+#.#.....#.#.#.....#.#...#.....#...#...#...#.........#...#.#.#.....#.......#...#.#.#.#.....#...#.#...#...#...#.#...#.....#...#.#...#.....#...#
+#.#.###.###.#.###.#.#######.#.###.#.###.#.#############.#.#.#.#####.#.#.#.#####.#.#.#.###.###.#.#.###########.#####.#######.#.#.#########.#.#
+#.#.#.....#.#.#.#...........#...#...#...#...#.....#.....#.#...#...#.#.#.#...#...#.#...#.#...#...#.....#.......#.....#.......#.#.........#...#
+#.#.#####.#.#.#.###############.#####.#####.#.#####.#####.###.#.#.###.#.#.#.#.#########.###.#######.#.#.###.###.#####.#.#####.#########.#####
+#.#.....#...#.....#.....#.......#.#...#...#.#.#.....#...........#.....#.#.#.#.#.....#.....#...#...#.#.#.#...#...#.......#.............#.#...#
+#.#####.###.#####.#.###.#.#######.#.#####.#.#.#.###########.###########.#.#.#.#.#.###.#.#####.#.###.#.#.#####.###.#####.#.#.#########.#.#.#.#
+#...#...#...#...#.#...#...#.....#.......#.#.#...#...........#.....#.....#.#...#.#.#...#.#.....#...#.#...#...#.#.#.......#.#.....#...#.#...#.#
+#####.#######.#.#####.#######.#.#######.#.#.#.###.###########.#.###.#####.###.#.#.#.###.#.#######.#.#####.#.#.#.###.#.#####.###.#.#.#.#####.#
+#...#.........#.........#...#.#...#.......#.#.....#.....#.........#.#.#...#...#.#...#.#...#.......#.....#.#.........#.....#.#...#.#.#.#...#.#
+#.#.###############.###.#.#.#.###.#########.#######.###.#.#######.#.#.#.###.###.#####.#########.#######.#.###########.###.#.#.###.###.#.#.#.#
+#.#.#.................#...#...#.#...........#.......#.#...#.....#.#.#.#...#...#.....#.........#.....#...#...........#...#...#.............#.#
+#.#.#.###.#####################.#############.###.#.#.#####.###.#.#.#.###.###.#####.#######.#.#####.#.#####.#######.#.###.#.#.###.#######.#.#
+#.#...#.#.#.....#...#.....#...#.....#.......#.....#...#.....#.#...#.#...#.........#.....#...#.....#.#...........#...#.#...#.#...#.........#.#
+#.#.###.#.#.###.#.#.#.#.#.#.#.#.#.#.#.#.###.#####.###.#.#####.###.#.#.#######.#########.#.#######.#.#######.###.#.#####.#######.###.###.###.#
+#.#...#...#...#.#.#.#.#.#...#.#...#...#.........#...#.......#.....#.#.#.....#.........#...#.....#.....#...#.#...#.....#.......#.#.......#...#
+#.#.###.#####.#.#.#.#.#.#####.###.#############.###.#.#####.#.#####.#.#.#.#########.#######.#.###.###.#.#.###.#######.#######.#.#######.#.###
+#.#...#...#...#.#.#...#...#...#...#.....#.....#.#...#.....#.......#.#.#.#.....#.....#.....#.#...#.#...#.#.....#.....#.........#.#...#...#.#.#
+#.#.#.#.###.###.#.#######.#.#.#.###.#.#.###.#.#.#.#.###.#.#.#####.#.#.#.#####.#.###.#.###.#.###.#.#.###.#######.#.#.###########.#.#.#####.#.#
+#.#.#...#.....#.#.#.....#.#.#.#...#.#.#.#...#.#...#.....#.#.....#.#.#.#...#...#.#...#.#.#...#.#...#...#...#.....#.#.......#.....#.#.......#.#
+#.###.#.#.###.#.#.#.#.###.#.#.###.#.#.#.#.#########.###########.###.#.###.#.###.#####.#.###.#.#######.###.#.#####.#######.#.#####.#########.#
+#.....#.#.#...#...#.#...#...#...#.#.#.#.#.......#.....#.......#.....#.....#...#...#...#...#...........#.#...#...#.....#.#...#.....#.........#
+#.###.#.#.###.#########.#####.###.###.#.#####.#.#.###.#.#####.###.###########.###.#.###.###.#####.###.#.#####.#######.#.###.#.#########.###.#
+#.#.#.#.#.#...........#.....#...#.....#...#...#.....#.#.#...#.......#...........#...#.......#.....#.#.....#.#.......#.#.....#...#.........#.#
+#.#.#.#.#.#.#########.#.#.#####.#########.#.#######.#.#.#.#.#.#####.#.#########.#####.#####.#.#####.#####.#.#.#.###.#.#########.###.###.#.#.#
+#.#.#.#.#...#.......#.#.#...#.....#.....#.#.....#...#.#.#.#...#.#...#.#.#.......#.#...#.......#.....#.#...#...#...#.#.........#...#.#.....#.#
+#.#.#.#.#########.#.#.#####.#.#####.###.#.#.###.#.###.#.#.#####.#.###.#.#.#######.#.###.###.###.###.#.#.###.#.###.#.#########.###.#.###.#.#.#
+#.#.#.#...........#.#.......#.....#...#...#...#...#.#...#.....#...#...#.#.....#.......#.....#...#...#.#...#...#.....#.......#.#...#.....#.#.#
+#.#.#.#######.#.#.#.#######.#.###.###.#######.#####.#######.#.#.###.###.#####.#.###.#.#####.###.#.###.###.#####.#.#.#.###.#.#.#.#######.#.#.#
+#...#...#...#...#.#.....#.#.#.#...#.#...#...#.#.......#...#.#.#.....#.......#...............#...#.......#.....#.#...#.#...#.#...#.......#...#
+#.#.#.#.#.#######.###.#.#.#.#.#.#.#.###.#.#.#.#.#####.#.#.#.#.#######.#####.#.#.#.#.#.#.#####.#####.#########.#.#.#####.###.#####.#####.###.#
+#.......#...#...#.....#...#...#.#.....#...#.#...#...#...#...#.#.....#...............#...#.........#.#.......#...#.......#.#...#...........#.#
+#####.###.#.#.#.#.###.#######.#.#.###.#####.#####.#.#########.#.###.#.#.#.#.#.#.#.#.#.###.#######.###.###.#.#############.###.#.#######.#.#.#
+#.....#...#.#.#.......#.......#.....#...#.#.#...#.#.....#.....#.#...#.#.#.#.#...#.#...#...#.....#...#...#.#.....#...#...#.....#.#.......#.#.#
+#.###.#####.#.###.#####.#########.#.###.#.#.#.#.#.#####.#.#####.#####.#.###.###.#.#####.###.#####.#.#.###.#.###.###.#.#.#.#####.#.#####.#.#.#
+#.#.......#.#...#.......#.....#...#.#...#.#...#...#.....#...#...#.....#...#.#.....#...#.#.#.......#...#...#.....#...#.#.#.....#...#.....#.#.#
+#.#.#####.#.#.###.#########.#.#.#.#.#.###.#########.#######.#.###.#####.#.#.#.#.#.#.#.#.#.#.#####.#.###.###.#####.###.#.#####.#####.###.#.#.#
+#...#...#.#...#...#.......................#...#...#.......#.#.....#.......#...#.....#.#.#.......#...#...#.........#...#.#.....#.........#...#
+#.#####.#.###.#.#.#.#.###.###.#.#.#.#####.#.#.#.#.#.#####.#.#.#####.#####.#####.#####.#.#.#######.#.#.#####.#####.#.###.#.#####.#####.#.#.###
+#.#...#.#...#.#.....#...................................#...#...#...#.........#...#.#...#.#.....#...#.#.........#.#.#.#.#.....#.#...#...#...#
+#.#.#.#.###.#####.#.###.###.#.#.#.###.#.###.#.#.###.#.#########.#####.#######.#.#.#.#######.###.#.#.#.#.###.###.###.#.#.#####.###.#.#.#.###.#
+#S..#.....#.............#.......#.....#.....#.......#.................#.........#...........#.....#.#.........#.......#...........#...#.....#
+#############################################################################################################################################

day16/input_test.txt

@@ -0,0 +1,15 @@
+###############
+#.......#....E#
+#.#.###.#.###.#
+#.....#.#...#.#
+#.###.#####.#.#
+#.#.#.......#.#
+#.#.#####.###.#
+#...........#.#
+###.#.#####.#.#
+#...#.....#.#.#
+#.#.#.###.#.#.#
+#.....#...#.#.#
+#.###.#.#.#.#.#
+#S..#.....#...#
+###############

day16/input_test2.txt

@@ -0,0 +1,17 @@
+#################
+#...#...#...#..E#
+#.#.#.#.#.#.#.#.#
+#.#.#.#...#...#.#
+#.#.#.#.###.#.#.#
+#...#.#.#.....#.#
+#.#.#.#.#.#####.#
+#.#...#.#.#.....#
+#.#.#####.#.###.#
+#.#.#.......#...#
+#.#.###.#####.###
+#.#.#...#.....#.#
+#.#.#.#####.###.#
+#.#.#.........#.#
+#.#.#.#########.#
+#S#.............#
+#################

day16/task.txt

@@ -0,0 +1,84 @@
+--- Day 16: Reindeer Maze ---
+It's time again for the Reindeer Olympics! This year, the big event is the Reindeer Maze, where the Reindeer compete for the lowest score.
+
+You and The Historians arrive to search for the Chief right as the event is about to start. It wouldn't hurt to watch a little, right?
+
+The Reindeer start on the Start Tile (marked S) facing East and need to reach the End Tile (marked E). They can move forward one tile at a time (increasing their score by 1 point), but never into a wall (#). They can also rotate clockwise or counterclockwise 90 degrees at a time (increasing their score by 1000 points).
+
+To figure out the best place to sit, you start by grabbing a map (your puzzle input) from a nearby kiosk. For example:
+
+###############
+#.......#....E#
+#.#.###.#.###.#
+#.....#.#...#.#
+#.###.#####.#.#
+#.#.#.......#.#
+#.#.#####.###.#
+#...........#.#
+###.#.#####.#.#
+#...#.....#.#.#
+#.#.#.###.#.#.#
+#.....#...#.#.#
+#.###.#.#.#.#.#
+#S..#.....#...#
+###############
+There are many paths through this maze, but taking any of the best paths would incur a score of only 7036. This can be achieved by taking a total of 36 steps forward and turning 90 degrees a total of 7 times:
+
+
+###############
+#.......#....E#
+#.#.###.#.###^#
+#.....#.#...#^#
+#.###.#####.#^#
+#.#.#.......#^#
+#.#.#####.###^#
+#..>>>>>>>>v#^#
+###^#.#####v#^#
+#>>^#.....#v#^#
+#^#.#.###.#v#^#
+#^....#...#v#^#
+#^###.#.#.#v#^#
+#S..#.....#>>^#
+###############
+Here's a second example:
+
+#################
+#...#...#...#..E#
+#.#.#.#.#.#.#.#.#
+#.#.#.#...#...#.#
+#.#.#.#.###.#.#.#
+#...#.#.#.....#.#
+#.#.#.#.#.#####.#
+#.#...#.#.#.....#
+#.#.#####.#.###.#
+#.#.#.......#...#
+#.#.###.#####.###
+#.#.#...#.....#.#
+#.#.#.#####.###.#
+#.#.#.........#.#
+#.#.#.#########.#
+#S#.............#
+#################
+In this maze, the best paths cost 11048 points; following one such path would look like this:
+
+#################
+#...#...#...#..E#
+#.#.#.#.#.#.#.#^#
+#.#.#.#...#...#^#
+#.#.#.#.###.#.#^#
+#>>v#.#.#.....#^#
+#^#v#.#.#.#####^#
+#^#v..#.#.#>>>>^#
+#^#v#####.#^###.#
+#^#v#..>>>>^#...#
+#^#v###^#####.###
+#^#v#>>^#.....#.#
+#^#v#^#####.###.#
+#^#v#^........#.#
+#^#v#^#########.#
+#S#>>^..........#
+#################
+Note that the path shown above includes one 90 degree turn as the very first move, rotating the Reindeer from facing East to facing North.
+
+Analyze your map carefully. What is the lowest score a Reindeer could possibly get?
+