day 22 task 1

src/tasks/day18.rs

@@ -80,6 +80,7 @@ struct StateSummaryDist(Pos, HashSet<char>, usize);
 #[derive(PartialEq, Eq, Clone)]
 struct Map(Vec<Vec<char>>);
 
+#[allow(dead_code)]
 impl Map {
     fn coordinate_of(&self, symbol: char) -> Vec<Pos> {
         self.0