advent-of-code-2022/ocaml/1.ml

#load "str.cma" ;;
#use "lib/file_utils.ml" ;;

let top n calories =
  let topn = List.filteri (fun i _ -> i < n) calories in
  let numcal = List.fold_left (+) 0 topn in
  Printf.printf "Top %d: %d\n" n numcal
;;

let order_desc a b = if a < b then 1 else -1 in
let contents = read_file "inputs/1.txt" in
let calories = Str.split (Str.regexp "\n\n") contents
  |> List.map (String.split_on_char '\n')
  |> List.map (List.map (int_of_string))
  |> List.map (List.fold_left (+) 0)
  |> List.sort order_desc
in
top 1 calories;
top 3 calories