Day 11 complete

aoc/day11.py

@@ -1,66 +1,130 @@
 from __future__ import annotations
+
+from array import array
+from collections.abc import Iterable
 from dataclasses import dataclass
+
 from .aoc import Aoc2, AocSameParser
 
 
+@dataclass
+class Position:
+    x: int
+    y: int
+
+    def __add__(self, other: Position) -> Position:
+        return Position(self.x + other.x, self.y + other.y)
+
+    def __sub__(self, other: Position) -> Position:
+        return Position(self.x - other.x, self.y - other.y)
+
+    def __or__(self, other: Position) -> int:
+        return abs(self.x - other.x) + abs(self.y - other.y)
+
+    def __rmul__(self, other: int) -> Position:
+        return Position(other * self.x, other * self.y)
+
+    def __getitem__(self, pi: int) -> int:
+        if pi == 0:
+            return self.x
+        return self.y
+
+    def __repr__(self) -> str:
+        return f"[{self.x},{self.y}]"
+
+
+class Matrix:
+    def __init__(self, inpt: str) -> None:
+        lines = inpt.splitlines()
+        self.height = len(lines)
+        self.width = len(lines[0])
+        self.array = array("u")
+        for line in lines:
+            self.array.fromlist(list(line))
+
+    def __getitem__(self, pos: Position | tuple[int, int]) -> str:
+        return self.array[self.width * pos[1] + pos[0]]
+
+    def __setitem__(self, pos: Position | tuple[int, int], value: str) -> None:
+        self.array[self.width * pos[1] + pos[0]] = value
+
+    def get_row(self, row_no: int) -> array[str]:
+        return self.array[self.width * row_no : self.width * (row_no + 1)]
+
+    def iter_rows(self) -> Iterable[array[str]]:
+        return (self.get_row(y) for y in range(self.height))
+
+    def get_col(self, col_no: int) -> array[str]:
+        return array("u", [self[col_no, y] for y in range(self.height)])
+
+    def iter_cols(self) -> Iterable[array[str]]:
+        return (self.get_col(x) for x in range(self.width))
+
+    def __str__(self) -> str:
+        return "\n".join((x.tounicode() for x in self.iter_rows()))
+
+    def finditer(self, element: str) -> Iterable[Position]:
+        for y, line in enumerate(self.iter_rows()):
+            for x, char in enumerate(line):
+                if char == element:
+                    yield Position(x, y)
+
+
 @dataclass
 class Map:
-    galaxies: list[tuple[int, int]]
+    map: Matrix
+    galaxies: list[Position]
+    adjusted_galaxies: list[Position]
+    large_adjusted_galaxies: list[Position]
 
     @classmethod
     def from_input(cls, inpt: str) -> Map:
-        lines = inpt.splitlines()
+        matrix = Matrix(inpt)
 
-        galaxies = []
-
-        for y, line in enumerate(lines):
-            for x, char in enumerate(line):
-                if char == "#":
-                    galaxies.append((x, y))
-
-        print(galaxies)
-
-        height = len(lines)
-        width = len(lines[0])
-
-        missing_ys = []
-        missing_xs = []
-
-        for y in range(height):
-            if y not in (y for (_, y) in galaxies):
-                missing_ys.append(y)
-
-        for x in range(width):
-            if x not in (x for (x, _) in galaxies):
-                missing_xs.append(x)
-
-        print(missing_xs)
-        print(missing_ys)
+        galaxies = list(matrix.finditer("#"))
+        missing_ys = [
+            y for y, row in enumerate(matrix.iter_rows()) if row.count("#") == 0
+        ]
+        missing_xs = [
+            x for x, col in enumerate(matrix.iter_cols()) if col.count("#") == 0
+        ]
 
         adjusted_galaxies = []
+        large_adjusted_galaxies = []
 
-        for x, y in galaxies:
-            x_offset = len([m for m in missing_xs if m < x])
-            y_offset = len([m for m in missing_ys if m < y])
-            adjusted_galaxies.append((x + x_offset, y + y_offset))
+        for pos in galaxies:
+            offset = Position(
+                len([m for m in missing_xs if m < pos.x]),
+                len([m for m in missing_ys if m < pos.y]),
+            )
+            adjusted_galaxies.append(pos + offset)
+            large_adjusted_galaxies.append(pos + 999_999 * offset)
 
-        return cls(galaxies)
+        return cls(matrix, galaxies, adjusted_galaxies, large_adjusted_galaxies)
 
 
 class Day11(AocSameParser[Map], Aoc2[Map, Map]):
     def parseinput(self, inpt: str) -> Map:
         return Map.from_input(inpt)
 
-    def part1(self, inpt: Map) -> None:
-        print(inpt)
+    def part1(self, inpt: Map) -> int:
+        return sum(
+            g1 | g2
+            for i, g1 in enumerate(inpt.adjusted_galaxies)
+            for g2 in inpt.adjusted_galaxies[i + 1 :]
+        )
 
-    def part2(self, inpt: Map) -> None:
-        print(inpt)
+    def part2(self, inpt: Map) -> int:
+        return sum(
+            g1 | g2
+            for i, g1 in enumerate(inpt.large_adjusted_galaxies)
+            for g2 in inpt.large_adjusted_galaxies[i + 1 :]
+        )
 
 
 def main() -> None:
     day11 = Day11(2023, 11)
-    day11.run_example_1()
+    day11.run()
 
 
 if __name__ == "__main__":