Merge branch 'main' of https://github.com/hunkyjimpjorps/AdventOfCode

1 files changed, 26 insertions, 0 deletions

diff --git a/codingquest2024/src/day8/solution.gleam b/codingquest2024/src/day8/solution.gleam
new file mode 100644
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--- /dev/null
+++ b/codingquest2024/src/day8/solution.gleam
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+import gleam/io
+import gleam/int
+import gleam/list
+import utilities/memo
+
+const options = [40, 12, 2, 1]
+
+const distance = 856
+
+pub fn main() {
+  use cache <- memo.create()
+  solve(distance, cache)
+  |> io.debug
+}
+
+fn solve(target, cache) {
+  use <- memo.memoize(cache, target)
+  case target {
+    0 -> 1
+    _ ->
+      options
+      |> list.filter(fn(n) { n <= target })
+      |> list.map(fn(n) { solve(target - n, cache) })
+      |> int.sum
+  }
+}