diff options
Diffstat (limited to '2024')
| -rw-r--r-- | 2024/day_03.ml | 29 |
1 files changed, 7 insertions, 22 deletions
diff --git a/2024/day_03.ml b/2024/day_03.ml index acd1391..501bd39 100644 --- a/2024/day_03.ml +++ b/2024/day_03.ml @@ -11,25 +11,11 @@ let read_file ic = in read [] |> List.rev |> String.concat "" -let regex = Str.regexp "mul(\\([0-9]+\\),\\([0-9]+\\))" +let regex_mul = Str.regexp "mul(\\([0-9]+\\),\\([0-9]+\\))" let regex_mul_part_2 = Str.regexp "mul(\\([0-9]+\\),\\([0-9]+\\))\\|don't()" let regex_do_part_2 = Str.regexp "do()" -let calculate_total str = - let rec calculate str acc = - try - let _ = Str.search_forward regex str 0 in - let a = Str.matched_group 1 str |> int_of_string in - let b = Str.matched_group 2 str |> int_of_string in - - let result = a * b in - let new_str = Str.replace_first regex (string_of_int result) str in - calculate new_str (acc + result) - with Not_found -> acc - in - calculate str 0 - -let calculate_total_part_2 str = +let calculate_total str regexp = let rec calculate str regexp acc = try let _ = Str.search_forward regexp str 0 in @@ -43,18 +29,17 @@ let calculate_total_part_2 str = | cmd when String.starts_with ~prefix:"mul" cmd -> let a = Str.matched_group 1 str |> int_of_string in let b = Str.matched_group 2 str |> int_of_string in - let result = a * b in - calculate new_str regexp (acc + result) + calculate new_str regexp (acc + (a * b)) | _ -> acc with Not_found -> acc in - calculate str regex_mul_part_2 0 + calculate str regexp 0 let () = let ic = open_in filename in - read_file ic |> calculate_total |> Printf.sprintf "Sum %d" |> print_endline; + let data = read_file ic in + calculate_total data regex_mul |> Printf.sprintf "Sum %d" |> print_endline; - let ic = open_in filename in - read_file ic |> calculate_total_part_2 + calculate_total data regex_mul_part_2 |> Printf.sprintf "Part 2 Sum %d" |> print_endline |