1 files changed, 24 insertions, 0 deletions
diff --git a/aoc2023/src/day17/solve.gleam b/aoc2023/src/day17/solve.gleam
index 5289ce9..3ed632c 100644
--- a/aoc2023/src/day17/solve.gleam
+++ b/aoc2023/src/day17/solve.gleam
@@ -1,5 +1,29 @@
 import adglent.{First, Second}
 import gleam/io
+import utilities/array2d.{type Posn, Posn}
+
+type Direction {
+  North
+  South
+  East
+  West
+}
+
+fn turn_dirs(dir: Direction) {
+  case dir {
+    North | South -> [East, West]
+    East | West -> [North, South]
+  }
+}
+
+fn delta(dir: Direction) {
+  case dir {
+    North -> Posn(-1, 0)
+    South -> Posn(1, 0)
+    East -> Posn(0, 1)
+    West -> Posn(0, -1)
+  }
+}
 
 pub fn part1(input: String) {
   todo as "Implement solution to part 1"