1 files changed, 5 insertions, 10 deletions

diff --git a/day15/__init__.py b/day15/__init__.py
index 5885f37..38bef35 100644
--- a/day15/__init__.py
+++ b/day15/__init__.py
@@ -1,17 +1,12 @@
 # -*- coding: utf-8 -*-
 import re
 from abc import ABC
-from collections import namedtuple
 from dataclasses import dataclass, field
-from typing import Tuple, Iterator, Any, Set, Union
-from typing import Tuple, Iterator, Any, Set, List
+from typing import Union
+from typing import Tuple, Iterator, Set, List
 
 from aoc import BaseAssignment
-
-
-class Coordinate(namedtuple("Coordinate", ["x", "y"])):
-    def distance(self, other: "Coordinate"):
-        return abs(self.x - other.x) + abs(self.y - other.y)
+from aoc.datastructures import Coordinate
 
 
 @dataclass
@@ -24,10 +19,10 @@ class Sensor:
         return hash(self.coordinate)
 
     def __post_init__(self):
-        self.radius = self.coordinate.distance(self.nearest)
+        self.radius = self.coordinate.manhattan_distance(self.nearest)
 
     def within_radius(self, coordinate: Coordinate) -> bool:
-        distance = self.coordinate.distance(coordinate)
+        distance = self.coordinate.manhattan_distance(coordinate)
         return distance <= self.radius
 
     def x_coordinates_within_radius_at(self, y: int, map: "Map") -> Union[range, list]: