day12

day12.py

@@ -0,0 +1,98 @@
+from heapq import heappush, heappop
+from tools.aoc import AOCDay
+from tools.coordinate import Coordinate
+from tools.grid import Grid
+from typing import Any
+
+
+def get_dijkstra_path(height_map: Grid, start: Coordinate, end: Coordinate) -> list | None:
+    f_costs = []
+    openNodes = {}
+    closedNodes = {}
+
+    openNodes[start] = (0, start.getDistanceTo(end), None)
+    heappush(f_costs, (0, start))
+
+    while f_costs:
+        _, currentCoord = heappop(f_costs)
+        if currentCoord not in openNodes:
+            continue
+        currentNode = openNodes[currentCoord]
+
+        closedNodes[currentCoord] = currentNode
+        del openNodes[currentCoord]
+        if currentCoord == end:
+            break
+
+        for neighbour in height_map.getNeighboursOf(currentCoord, includeDiagonal=False):
+            if neighbour in closedNodes or height_map.get(neighbour) - 1 > height_map.get(currentCoord):
+                continue
+
+            neighbourDist = 1
+
+            targetDist = neighbour.getDistanceTo(end)
+            f_cost = targetDist + neighbourDist + currentNode[1]
+
+            if neighbour not in openNodes or f_cost < openNodes[neighbour][0]:
+                openNodes[neighbour] = (f_cost, currentNode[1] + neighbourDist, currentCoord)
+                heappush(f_costs, (f_cost, neighbour))
+
+    if end not in closedNodes:
+        return None
+    else:
+        currentNode = closedNodes[end]
+        pathCoords = [end]
+        while currentNode[2]:
+            pathCoords.append(currentNode[2])
+            currentNode = closedNodes[currentNode[2]]
+
+        return pathCoords
+
+
+class Day(AOCDay):
+    inputs = [
+        [
+            (31, "input12_test"),
+            (423, "input12"),
+        ],
+        [
+            (29, "input12_test"),
+            (416, "input12"),
+        ]
+    ]
+
+    def get_map(self) -> (Grid, Coordinate, Coordinate):
+        grid = Grid(30)
+        start = None
+        end = None
+        for y, line in enumerate(self.getInput()):
+            for x, char in enumerate(line):
+                if char == 'S':
+                    start = Coordinate(x, y)
+                    grid.set(start, 0)
+                elif char == 'E':
+                    end = Coordinate(x, y)
+                    grid.set(end, 25)
+                else:
+                    grid.set(Coordinate(x, y), ord(char) - ord('a'))
+
+        return grid, start, end
+
+    def part1(self) -> Any:
+        return len(get_dijkstra_path(*self.get_map())) - 1
+
+    def part2(self) -> Any:
+        min_steps = float("inf")
+        height_map, start, end = self.get_map()
+        for c in height_map.getActiveCells():
+            if height_map.get(c) == 0:
+                steps_from_here = get_dijkstra_path(height_map, c, end)
+                if steps_from_here is not None and len(steps_from_here) < min_steps:
+                    min_steps = len(steps_from_here)
+
+        return min_steps - 1
+
+
+if __name__ == '__main__':
+    day = Day(2022, 12)
+    day.run(verbose=True)

inputs/input12

@@ -0,0 +1,41 @@
+abaaacccccccccaaaaaaccccccccccccccccaacccccccccccaacaaaaaaaaaaaaaaaaaccaaaaacccaaaaccccccccccccccccccccccccccccccccccccccccccccccccccccccccaaaaa
+abaaacccccccccaaaaaacccccccccccccccaaaaccccccccccaaaaaaaacaaaaaaaaaaaccaaaaaaccaaaacccccccccccccccccccccccccccccccccccccccccccccccccccccccaaaaaa
+abaaaccccccccccaaaaacccccccccccccccaaaacccccccccccaaaaacccaaaaaaaaaacccaaaaaacccaaccccccccccccccaaaaacccccccccccccccccccccccccccccccccccccaaaaaa
+abccccaaccccccaaaaacccccccccaaaaaccaaaaccccccccccccaaaaacaaaaaaaaacccccaaaaaccccccccccccccccccccaaaaacccccccccccccccccaaaccccaaaccccccccccaaacaa
+abcccaaaacccccaaaaacccccccccaaaaacccccccccccccccccaaacaaaaaaaaaacccccccaaaaacccccccccccccccccccaaaaaacccccccccccccccccaaaaccaaaaccccccccccccccaa
+abcccaaaaacacccccccccccccccaaaaaaccccccccccccccccccaaccaaaaacaaaaccccccccccccccccccccccccccccccaaaaaaccccccccccccccccccaaaaaaaacccccccccccccccaa
+abaaaaaaaaaacccccccccccccccaaaaaaccccccccccccccccccccccaaaacccaaaccccccccccccccccccccccccccccccaaaaaacccccccccccccccciiiiijaaaaccccccccccccccccc
+abaaaaaaaaaacccccccccccccccaaaaaacccccccccccccccccccccccccccccaaacccccccccccccccccccccccccccccccaaaccccccccccccccccciiiiiijjjaccccccccaaaccccccc
+abccaaaaaaccccccccccccccccccaaaccccccccccccccccccccccccccccccccacccccccccccaacccccccccccccccccccccccccccccccccccccciiiiioijjjjaaccccccaaaaaacccc
+abccaaaaaacccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccaaaaaacccccccccccccccccccccccccccccccccccciiinnooojjjjjaaccaaaaaaaacccc
+abccaaaaaacccccccccccccccccccccccccccccccccccccaacccccaacccccccccccccccccaaaaaacccccccccccccccccccccccccccaaaccccciiinnnoooojjjjjjkkkaaaaaaacccc
+abcaaaaaaaaccccccccccccccccccccccccccccccccccccaaaccaaaaaaccccaaacccccccccaaaacccccccccccccccccccccccccccccaaaaccciiinnnouooojjjjkkkkkaaaaaccccc
+abccaccccccccccccccccccaaccccccaccccccccccccaaaaaaaaaaaaaacccaaaacccccccccaaaacccccccccccccccccccccccccccaaaaaacchhinnnttuuooooookkkkkkkaaaccccc
+abccccccccccccccccccaacaaaccccaaaaaaaaccccccaaaaaaaacaaaaacccaaaacccccccccaccacccccccccccccccccccccccccccaaaaacchhhhnntttuuuooooppppkkkkcaaacccc
+abccccccccaaacccccccaaaaaccccccaaaaaaccccccccaaaaaacaaaaaccccaaaaccccccccccccccccccccccccccccaccccccccccccaaaaahhhhnnntttxuuuooppppppkkkcccccccc
+abccccccccaaaacccccccaaaaaaccccaaaaaaccaaacccaaaaaacaaaaaccccccccccccccaaccccccccccccccaaaaaaaacccccccccccaachhhhhnnnntttxxuuuuuuuupppkkkccccccc
+abccccccccaaaacccccaaaaaaaacccaaaaaaaacaaacacaaaaaaccccccccccccccccccccaacccccccccccccccaaaaaacccccccccccccchhhhmnnnntttxxxxuuuuuuupppkkcccccccc
+abacccccccaaaacccccaaaaacaaccaaaaaaaaaaaaaaaaaaccaacccccccccccccccccaaaaaaaaccccccccccccaaaaaaccccccccccccchhhhmmmntttttxxxxuyyyuvvpppklcccccccc
+abacccccccccccccccccacaaaccaaaaaaaaaaaaaaaaaaaccccccccccccccccccccccaaaaaaaacccccccccccaaaaaaaaccccccccccccgghmmmtttttxxxxxxyyyyvvvpplllcccccccc
+abaccccccccaacccccccccaaaccaaaaaaaacaaaaaaaaaaccccccccccccccccccccccccaaaaccccccccccccaaaaaaaaaaccccccaccccgggmmmtttxxxxxxxyyyyyvvppplllcccccccc
+SbaaaccccccaaacaaaccccccccaaaaaaaaacaaaaaaaaacccccccccccccccccccccccccaaaaacccccccccccaaaaaaaaaaaaacaaaccaagggmmmtttxxxEzzzzyyyvvppplllccccccccc
+abaacccccccaaaaaaacccccccaaaaaaacaaccaaaaaaaccccccccccccccaaaccccccccaaaaaacccccccccccacacaaacccaaaaaaacaaagggmmmsssxxxxxyyyyyvvvqqqlllccccccccc
+abaccccccccaaaaaaccacccaaaaaaaaacccccccaaaaaaccccccccccccaaaaccccccccaaccaacccccccccccccccaaaccccaaaaaaccaagggmmmssssxxwwyyyyyyvvqqqlllccccccccc
+abaccccccaaaaaaaaccaacaaaccaaaaaacccccaaaaaaaccccccccccccaaaaccccccccccaacccccccccccccccccaacccccaaaaaaaaaaggggmmmssssswwyywyyyyvvqqlllccccccccc
+abaccccccaaaaaaaaacaaaaacccaaaaaacccccaaacaaaccccccccccccaaaaccccccccaaaaaaccccccccccccaacccccccaaaaaaaaaaaaggggmmmossswwyywwyyvvvqqqllccccccccc
+abcccccccaaaaaaaaaacaaaaaacaaccccccccaaacccccccccccccccccccccccccccccaaaaaaccccccccccccaaaaacccaaaaaaaaaaaaaaggggoooosswwywwwwvvvvqqqmlccccccccc
+abccccccccccaaacaaaaaaaaaacccccccccccaaacaccccccccccccccccccccccccccccaaaaccccccccccccaaaaaccccaaacaaacccaaacagggfooosswwwwwrvvvvqqqqmmccccccccc
+abccccccccccaaacccaaaaaaaacccccccccaacaaaaacccccccccccccccccccccccccccaaaaccccccccccccaaaaaacccccccaaacccaaccccfffooosswwwwrrrrrqqqqqmmccccccccc
+abccccccccccaacccccccaaccccccccccccaaaaaaaacccccccccccccaaccccccccccccaccaccccccccccccccaaaacccccccaacccccccccccfffoossrwrrrrrrrqqqqmmmccccccccc
+abccaaaccccccccccccccaacccccccccccccaaaaaccccccccccccaacaacccccccaaaaacccccccccccccccccaacccccccccccccccccccccccfffoossrrrrrnnnmqqmmmmmccccccccc
+abcaaaaccccccccccccccccccccccccccccccaaaaacccccccccccaaaaacccccccaaaaacccaaaccccccccccccccccccccccccccccccccccccfffooorrrrrnnnnmmmmmmmccccaacccc
+abcaaaacccccccccccccccccccccccccccccaaacaaccccacccccccaaaaaaccccaaaaaaccccaaaccacccccccccccccccccccccccccccccccccffoooonnnnnnnnmmmmmmccccaaacccc
+abccaaacccccccccccccccccccccaaaaaccccaaccccaaaacccccaaaaaaaaccccaaaaaaccccaaaaaaaccccccccccccccccaccaccccccccccccfffooonnnnnnddddddddcccaaaccccc
+abccccccccccccccccccccccccccaaaaaccccccccccaaaaaacccaaaaacaacccaaaaaaaccaaaaaaaacccccccccccccccccaaaaccccccccccccfffeonnnnneddddddddddcaaacccccc
+abccccccccccaaaccccccccccccaaaaaacccccccccccaaaacccccacaaacccccaacaacccaaaaaaaaacccccccccccccccccaaaacccccccccccccffeeeeeeeeddddddddcccaaacccccc
+abcccccccccaaaaccccacccccccaaaaaaccccccccccaaaaacccccccaaaacccaaacaccccaaaaaaaaaccccccccccccccccaaaaaaccccccccccccceeeeeeeeedacccccccccccccccccc
+abaccccccccaaaaccccaaacaaacaaaaaaccccccccccaacaaccccccccaaaacaaaacaaacaaaaaaaaaacccccccccccccaacaaaaaacccccccccccccceeeeeeeaaacccccccccccccccaaa
+abaaacccccccaaaccccaaaaaaaccaaaccccccccaaacccccccccccccccaaaaaaaacaaaaaaaaaaaaaaacacaaccaaacaaacccaacccccccccccccccccaacccaaaacccccccccccccccaaa
+abaaaccccccccccccccaaaaaaccccccccccccccaaacccccccccccccccaaaaaaaccaaaaaaccaacccaccaaaaccaaaaaaaccccccccaaccccccccccccccccccaaacccccccccccccccaaa
+abaaccccccccccccccaaaaaaacccccccccccaaaaaaaaccccccccccccccaaaaaaaaaaaaaacaaaccccccaaaaaccaaaaaaccccccaaaaccccccccccccccccccaaaccccccccccccaaaaaa
+abaaaccccccccccccaaaaaaaaaacccccccccaaaaaaaacccccccccccaaaaaaaaaaaaaaaaaaacccccccaaaaaacaaaaaaaaaccccaaaaaacccccccccccccccccccccccccccccccaaaaaa

inputs/input12_test

@@ -0,0 +1,5 @@
+Sabqponm
+abcryxxl
+accszExk
+acctuvwj
+abdefghi