Some tidy-ups.

bin/day2423.ml

@@ -1,17 +1,6 @@
 module StringMap = Map.Make (String)
 module StringSet = Set.Make (String)
 
-let[@warning "-32"] print_set set =
-  StringSet.to_list set |> List.sort compare |> String.concat ","
-  |> Printf.printf "%s\n"
-
-let[@warning "-32"] print_sets = List.iter print_set
-
-let[@warning "-32"] print_map =
-  StringMap.iter (fun k v ->
-      Printf.printf "%s: " k;
-      print_set v)
-
 let add_connection map (a, b) =
   let update s = function
     | None -> Some (StringSet.add s StringSet.empty)
@@ -81,16 +70,14 @@ let part1 connections =
     find_rings [] StringSet.empty connections computers
     |> List.filter starts_with_t
   in
-  print_sets rings;
-  List.length rings
+  string_of_int (List.length rings)
 
 let rec search_candidate max_set connections current candidates =
   match StringSet.choose_opt candidates with
   | None ->
-      if StringSet.cardinal current > StringSet.cardinal max_set then current
-      else max_set
+      if List.length current > List.length max_set then current else max_set
   | Some h ->
-      let current' = StringSet.add h current in
+      let current' = h :: current in
       let candidates' =
         StringSet.inter candidates (StringMap.find h connections)
       in
@@ -101,18 +88,12 @@ let rec search_candidate max_set connections current candidates =
 let find_max_set connections =
   let rec impl max_set = function
     | [] -> max_set
-    | (k, v) :: t ->
-        impl
-          (search_candidate max_set connections
-             (StringSet.add k StringSet.empty)
-             v)
-          t
+    | (k, v) :: t -> impl (search_candidate max_set connections [ k ] v) t
   in
-  impl StringSet.empty (StringMap.to_list connections)
+  impl [] (StringMap.to_list connections)
 
 let part2 connections =
   let max_set = find_max_set connections in
-  print_set max_set;
-  StringSet.cardinal max_set
+  List.sort compare max_set |> String.concat ","
 
-let _ = Aoc.main load_file [ (string_of_int, part1); (string_of_int, part2) ]
+let _ = Aoc.main load_file [ (Fun.id, part1); (Fun.id, part2) ]