2025/ocaml/lib/application/d03p01.mli


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val solve : string -> unit -> (int, string) result
(** [solve input ()] is the solution for the first part of the third day of advent of code 2025 for [input].
    The solution for an empty input is [Error msg].
    Requires: [input] to be a string. *)

val print_occurring_digits : string -> unit -> int