Day 6 part 1

2022/input/day_6.txt

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2022/src/days/day_6.gleam

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+import gleam/io
+import gleam/result
+import gleam/string
+import gleam/list
+
+pub fn pt_1(input: String) -> Int {
+  assert Ok(header) =
+    input
+    |> string.trim_right
+    |> string.to_graphemes
+    |> list.index_map(fn(i, el) { #(i + 1, el) })
+    |> list.window(4)
+    |> list.find(is_unique)
+
+  assert Ok(index) = list.last(header)
+  index.0
+}
+
+pub fn pt_2(input: String) -> Int {
+  todo
+}
+
+fn is_unique(chars: List(#(Int, String))) -> Bool {
+  chars
+  |> list.map(fn(pair) { pair.1 })
+  |> list.unique
+  |> list.length == 4
+}