diff --git a/2015/d03.py b/2015/d03.py
index 5a64fe9..1bf22f1 100755
--- a/2015/d03.py
+++ b/2015/d03.py
@@ -7,12 +7,7 @@
 
 SAMPLE = ["^>v<", "^v^v^v^v^v"]
 InputType = list[str]
-MAPPING = {
-    "^": complex(0, +1),
-    "v": complex(0, -1),
-    "<": complex(-1, 0),
-    ">": complex(+1, 0),
-}
+MAPPING = aoc.ARROW_DIRECTIONS
 
 
 class Day03(aoc.Challenge):
diff --git a/2018/d13.py b/2018/d13.py
index 25f072d..85b8234 100755
--- a/2018/d13.py
+++ b/2018/d13.py
@@ -39,12 +39,9 @@
 ROT_STRAIGHT = complex(1, -0)
 ROT_RIGHT = complex(0, 1)
 ROTATIONS = [ROT_LEFT, ROT_STRAIGHT, ROT_RIGHT]
-UP = complex(0, -1)
-DOWN = complex(0, 1)
-LEFT = complex(-1, 0)
-RIGHT = complex(1, 0)
+UP, DOWN, RIGHT, LEFT = aoc.FOUR_DIRECTIONS
 
-DIRECTIONS = {"^": UP, "v": DOWN, "<": LEFT, ">": RIGHT}
+DIRECTIONS = aoc.ARROW_DIRECTIONS
 CORNERS = {
     "/": {UP: RIGHT, LEFT: DOWN, RIGHT: UP, DOWN: LEFT},
     "\\": {UP: LEFT, LEFT: UP, RIGHT: DOWN, DOWN: RIGHT},
diff --git a/2022/d17.py b/2022/d17.py
index ffea60f..65c6dbe 100755
--- a/2022/d17.py
+++ b/2022/d17.py
@@ -59,7 +59,7 @@ def solver(self, puzzle_input: InputType, part_one: bool) -> int:
         stream = puzzle_input
         stream_size = len(stream)
         # Wind directions, translated to a number.
-        wind_direction = [{"<": -1, ">": 1}[i] for i in stream]
+        wind_direction = [aoc.ARROW_DIRECTIONS[i] for i in stream]
         # Index counter which wraps around.
         wind_idx_iter = itertools.cycle(range(stream_size))
 
diff --git a/2022/d24.py b/2022/d24.py
index 386b3b8..ec11544 100755
--- a/2022/d24.py
+++ b/2022/d24.py
@@ -69,7 +69,7 @@ def input_parser(cls, puzzle_input: str) -> Basin:
                 if char == ".":
                     continue
                 positions[char].add(complex(x_pos, y_pos))
-        char_to_dir = {">": 1, "<": -1, "v": 1j, "^": -1j}
+        char_to_dir = aoc.ARROW_DIRECTIONS
         blizzards = {direction: positions[char] for char, direction in char_to_dir.items()}
         return cls(
             walls=positions["#"],
diff --git a/pylib/helpers.py b/pylib/helpers.py
index 7a94d65..1dd3502 100644
--- a/pylib/helpers.py
+++ b/pylib/helpers.py
@@ -41,7 +41,7 @@
   'sw': -1 +0j,
 }
 
-RE_INT = re.compile(r"[+-]?\d{1,1000")
+RE_INT = re.compile(r"[+-]?\d{1,1000}")
 RE_BOUNDED_INT = re.compile(r"[+-]?\b\d+\b")
 OPERATORS = {
     ">": operator.gt,