module Hashtbl :
sig
  type ('a, 'b) t = ('a, 'b) Hashtbl.t
  val create : ?random:bool -> int -> ('a, 'b) t
  val clear : ('a, 'b) t -> unit
  val reset : ('a, 'b) t -> unit
  val copy : ('a, 'b) t -> ('a, 'b) t
  val add : ('a, 'b) t -> key:'a -> data:'b -> unit
  val find : ('a, 'b) t -> 'a -> 'b
  val find_opt : ('a, 'b) t -> 'a -> 'b option
  val find_all : ('a, 'b) t -> 'a -> 'b list
  val mem : ('a, 'b) t -> 'a -> bool
  val remove : ('a, 'b) t -> 'a -> unit
  val replace : ('a, 'b) t -> key:'a -> data:'b -> unit
  val iter : f:(key:'a -> data:'b -> unit) -> ('a, 'b) t -> unit
  val filter_map_inplace :
    f:(key:'a -> data:'b -> 'b option) -> ('a, 'b) t -> unit
  val fold : f:(key:'a -> data:'b -> 'c -> 'c) -> ('a, 'b) t -> init:'c -> 'c
  val length : ('a, 'b) t -> int
  val randomize : unit -> unit
  val is_randomized : unit -> bool
  val rebuild : ?random:bool -> ('a, 'b) t -> ('a, 'b) t
  type statistics = Hashtbl.statistics =
    {
    num_bindings: int ;
    num_buckets: int ;
    max_bucket_length: int ;
    bucket_histogram: int array }
  val stats : ('a, 'b) t -> statistics
  val to_seq : ('a, 'b) t -> ('a * 'b) Seq.t
  val to_seq_keys : ('a, 'b) t -> 'a Seq.t
  val to_seq_values : ('a, 'b) t -> 'b Seq.t
  val add_seq : ('a, 'b) t -> ('a * 'b) Seq.t -> unit
  val replace_seq : ('a, 'b) t -> ('a * 'b) Seq.t -> unit
  val of_seq : ('a * 'b) Seq.t -> ('a, 'b) t
  module type HashedType  =
    sig type t val equal : t -> t -> bool val hash : t -> int end
  module type S  =
    sig
      type key
      type !'a t
      val create : int -> 'a t
      val clear : 'a t -> unit
      val reset : 'a t -> unit
      val copy : 'a t -> 'a t
      val add : 'a t -> key:key -> data:'a -> unit
      val remove : 'a t -> key -> unit
      val find : 'a t -> key -> 'a
      val find_opt : 'a t -> key -> 'a option
      val find_all : 'a t -> key -> 'a list
      val replace : 'a t -> key:key -> data:'a -> unit
      val mem : 'a t -> key -> bool
      val iter : f:(key:key -> data:'a -> unit) -> 'a t -> unit
      val filter_map_inplace :
        f:(key:key -> data:'a -> 'a option) -> 'a t -> unit
      val fold : f:(key:key -> data:'a -> 'b -> 'b) -> 'a t -> init:'b -> 'b
      val length : 'a t -> int
      val stats : 'a t -> statistics
      val to_seq : 'a t -> (key * 'a) Seq.t
      val to_seq_keys : 'a t -> key Seq.t
      val to_seq_values : 'a t -> 'a Seq.t
      val add_seq : 'a t -> (key * 'a) Seq.t -> unit
      val replace_seq : 'a t -> (key * 'a) Seq.t -> unit
      val of_seq : (key * 'a) Seq.t -> 'a t
    end
  module Make :
  functor (H : HashedType) ->
    sig
      type key = H.t
      type 'a t = 'a Hashtbl.Make(H).t
      val create : int -> 'a t
      val clear : 'a t -> unit
      val reset : 'a t -> unit
      val copy : 'a t -> 'a t
      val add : 'a t -> key:key -> data:'a -> unit
      val remove : 'a t -> key -> unit
      val find : 'a t -> key -> 'a
      val find_opt : 'a t -> key -> 'a option
      val find_all : 'a t -> key -> 'a list
      val replace : 'a t -> key:key -> data:'a -> unit
      val mem : 'a t -> key -> bool
      val iter : f:(key:key -> data:'a -> unit) -> 'a t -> unit
      val filter_map_inplace :
        f:(key:key -> data:'a -> 'a option) -> 'a t -> unit
      val fold : f:(key:key -> data:'a -> 'b -> 'b) -> 'a t -> init:'b -> 'b
      val length : 'a t -> int
      val stats : 'a t -> statistics
      val to_seq : 'a t -> (key * 'a) Seq.t
      val to_seq_keys : 'a t -> key Seq.t
      val to_seq_values : 'a t -> 'a Seq.t
      val add_seq : 'a t -> (key * 'a) Seq.t -> unit
      val replace_seq : 'a t -> (key * 'a) Seq.t -> unit
      val of_seq : (key * 'a) Seq.t -> 'a t
    end
  module type SeededHashedType  =
    sig type t val equal : t -> t -> bool val hash : int -> t -> int end
  module type SeededS  =
    sig
      type key
      type !'a t
      val create : ?random:bool -> int -> 'a t
      val clear : 'a t -> unit
      val reset : 'a t -> unit
      val copy : 'a t -> 'a t
      val add : 'a t -> key:key -> data:'a -> unit
      val remove : 'a t -> key -> unit
      val find : 'a t -> key -> 'a
      val find_opt : 'a t -> key -> 'a option
      val find_all : 'a t -> key -> 'a list
      val replace : 'a t -> key:key -> data:'a -> unit
      val mem : 'a t -> key -> bool
      val iter : f:(key:key -> data:'a -> unit) -> 'a t -> unit
      val filter_map_inplace :
        f:(key:key -> data:'a -> 'a option) -> 'a t -> unit
      val fold : f:(key:key -> data:'a -> 'b -> 'b) -> 'a t -> init:'b -> 'b
      val length : 'a t -> int
      val stats : 'a t -> statistics
      val to_seq : 'a t -> (key * 'a) Seq.t
      val to_seq_keys : 'a t -> key Seq.t
      val to_seq_values : 'a t -> 'a Seq.t
      val add_seq : 'a t -> (key * 'a) Seq.t -> unit
      val replace_seq : 'a t -> (key * 'a) Seq.t -> unit
      val of_seq : (key * 'a) Seq.t -> 'a t
    end
  module MakeSeeded :
  functor (H : SeededHashedType) ->
    sig
      type key = H.t
      type 'a t = 'a Hashtbl.MakeSeeded(H).t
      val create : ?random:bool -> int -> 'a t
      val clear : 'a t -> unit
      val reset : 'a t -> unit
      val copy : 'a t -> 'a t
      val add : 'a t -> key:key -> data:'a -> unit
      val remove : 'a t -> key -> unit
      val find : 'a t -> key -> 'a
      val find_opt : 'a t -> key -> 'a option
      val find_all : 'a t -> key -> 'a list
      val replace : 'a t -> key:key -> data:'a -> unit
      val mem : 'a t -> key -> bool
      val iter : f:(key:key -> data:'a -> unit) -> 'a t -> unit
      val filter_map_inplace :
        f:(key:key -> data:'a -> 'a option) -> 'a t -> unit
      val fold : f:(key:key -> data:'a -> 'b -> 'b) -> 'a t -> init:'b -> 'b
      val length : 'a t -> int
      val stats : 'a t -> statistics
      val to_seq : 'a t -> (key * 'a) Seq.t
      val to_seq_keys : 'a t -> key Seq.t
      val to_seq_values : 'a t -> 'a Seq.t
      val add_seq : 'a t -> (key * 'a) Seq.t -> unit
      val replace_seq : 'a t -> (key * 'a) Seq.t -> unit
      val of_seq : (key * 'a) Seq.t -> 'a t
    end
  val hash : 'a -> int
  val seeded_hash : int -> 'a -> int
  val hash_param : int -> int -> 'a -> int
  val seeded_hash_param : int -> int -> int -> 'a -> int
end
module Map :
sig
  module type OrderedType  = sig type t val compare : t -> t -> int end
  module type S  =
    sig
      type key
      type +!'a t
      val empty : 'a t
      val is_empty : 'a t -> bool
      val mem : key -> 'a t -> bool
      val add : key:key -> data:'a -> 'a t -> 'a t
      val update : key:key -> f:('a option -> 'a option) -> 'a t -> 'a t
      val singleton : key -> 'a -> 'a t
      val remove : key -> 'a t -> 'a t
      val merge :
        f:(key -> 'a option -> 'b option -> 'c option) ->
          'a t -> 'b t -> 'c t
      val union : f:(key -> 'a -> 'a -> 'a option) -> 'a t -> 'a t -> 'a t
      val compare : cmp:('a -> 'a -> int) -> 'a t -> 'a t -> int
      val equal : cmp:('a -> 'a -> bool) -> 'a t -> 'a t -> bool
      val iter : f:(key:key -> data:'a -> unit) -> 'a t -> unit
      val fold : f:(key:key -> data:'a -> 'b -> 'b) -> 'a t -> init:'b -> 'b
      val for_all : f:(key -> 'a -> bool) -> 'a t -> bool
      val exists : f:(key -> 'a -> bool) -> 'a t -> bool
      val filter : f:(key -> 'a -> bool) -> 'a t -> 'a t
      val filter_map : f:(key -> 'a -> 'b option) -> 'a t -> 'b t
      val partition : f:(key -> 'a -> bool) -> 'a t -> ('a t * 'a t)
      val cardinal : 'a t -> int
      val bindings : 'a t -> (key * 'a) list
      val min_binding : 'a t -> (key * 'a)
      val min_binding_opt : 'a t -> (key * 'a) option
      val max_binding : 'a t -> (key * 'a)
      val max_binding_opt : 'a t -> (key * 'a) option
      val choose : 'a t -> (key * 'a)
      val choose_opt : 'a t -> (key * 'a) option
      val split : key -> 'a t -> ('a t * 'a option * 'a t)
      val find : key -> 'a t -> 'a
      val find_opt : key -> 'a t -> 'a option
      val find_first : f:(key -> bool) -> 'a t -> (key * 'a)
      val find_first_opt : f:(key -> bool) -> 'a t -> (key * 'a) option
      val find_last : f:(key -> bool) -> 'a t -> (key * 'a)
      val find_last_opt : f:(key -> bool) -> 'a t -> (key * 'a) option
      val map : f:('a -> 'b) -> 'a t -> 'b t
      val mapi : f:(key -> 'a -> 'b) -> 'a t -> 'b t
      val to_seq : 'a t -> (key * 'a) Seq.t
      val to_rev_seq : 'a t -> (key * 'a) Seq.t
      val to_seq_from : key -> 'a t -> (key * 'a) Seq.t
      val add_seq : (key * 'a) Seq.t -> 'a t -> 'a t
      val of_seq : (key * 'a) Seq.t -> 'a t
    end
  module Make :
  functor (Ord : OrderedType) ->
    sig
      type key = Ord.t
      type 'a t = 'a Map.Make(Ord).t
      val empty : 'a t
      val is_empty : 'a t -> bool
      val mem : key -> 'a t -> bool
      val add : key:key -> data:'a -> 'a t -> 'a t
      val update : key:key -> f:('a option -> 'a option) -> 'a t -> 'a t
      val singleton : key -> 'a -> 'a t
      val remove : key -> 'a t -> 'a t
      val merge :
        f:(key -> 'a option -> 'b option -> 'c option) ->
          'a t -> 'b t -> 'c t
      val union : f:(key -> 'a -> 'a -> 'a option) -> 'a t -> 'a t -> 'a t
      val compare : cmp:('a -> 'a -> int) -> 'a t -> 'a t -> int
      val equal : cmp:('a -> 'a -> bool) -> 'a t -> 'a t -> bool
      val iter : f:(key:key -> data:'a -> unit) -> 'a t -> unit
      val fold : f:(key:key -> data:'a -> 'b -> 'b) -> 'a t -> init:'b -> 'b
      val for_all : f:(key -> 'a -> bool) -> 'a t -> bool
      val exists : f:(key -> 'a -> bool) -> 'a t -> bool
      val filter : f:(key -> 'a -> bool) -> 'a t -> 'a t
      val filter_map : f:(key -> 'a -> 'b option) -> 'a t -> 'b t
      val partition : f:(key -> 'a -> bool) -> 'a t -> ('a t * 'a t)
      val cardinal : 'a t -> int
      val bindings : 'a t -> (key * 'a) list
      val min_binding : 'a t -> (key * 'a)
      val min_binding_opt : 'a t -> (key * 'a) option
      val max_binding : 'a t -> (key * 'a)
      val max_binding_opt : 'a t -> (key * 'a) option
      val choose : 'a t -> (key * 'a)
      val choose_opt : 'a t -> (key * 'a) option
      val split : key -> 'a t -> ('a t * 'a option * 'a t)
      val find : key -> 'a t -> 'a
      val find_opt : key -> 'a t -> 'a option
      val find_first : f:(key -> bool) -> 'a t -> (key * 'a)
      val find_first_opt : f:(key -> bool) -> 'a t -> (key * 'a) option
      val find_last : f:(key -> bool) -> 'a t -> (key * 'a)
      val find_last_opt : f:(key -> bool) -> 'a t -> (key * 'a) option
      val map : f:('a -> 'b) -> 'a t -> 'b t
      val mapi : f:(key -> 'a -> 'b) -> 'a t -> 'b t
      val to_seq : 'a t -> (key * 'a) Seq.t
      val to_rev_seq : 'a t -> (key * 'a) Seq.t
      val to_seq_from : key -> 'a t -> (key * 'a) Seq.t
      val add_seq : (key * 'a) Seq.t -> 'a t -> 'a t
      val of_seq : (key * 'a) Seq.t -> 'a t
    end
end
module Set :
sig
  module type OrderedType  = sig type t val compare : t -> t -> int end
  module type S  =
    sig
      type elt
      type t
      val empty : t
      val is_empty : t -> bool
      val mem : elt -> t -> bool
      val add : elt -> t -> t
      val singleton : elt -> t
      val remove : elt -> t -> t
      val union : t -> t -> t
      val inter : t -> t -> t
      val disjoint : t -> t -> bool
      val diff : t -> t -> t
      val compare : t -> t -> int
      val equal : t -> t -> bool
      val subset : t -> t -> bool
      val iter : f:(elt -> unit) -> t -> unit
      val map : f:(elt -> elt) -> t -> t
      val fold : f:(elt -> 'a -> 'a) -> t -> init:'a -> 'a
      val for_all : f:(elt -> bool) -> t -> bool
      val exists : f:(elt -> bool) -> t -> bool
      val filter : f:(elt -> bool) -> t -> t
      val filter_map : f:(elt -> elt option) -> t -> t
      val partition : f:(elt -> bool) -> t -> (t * t)
      val cardinal : t -> int
      val elements : t -> elt list
      val min_elt : t -> elt
      val min_elt_opt : t -> elt option
      val max_elt : t -> elt
      val max_elt_opt : t -> elt option
      val choose : t -> elt
      val choose_opt : t -> elt option
      val split : elt -> t -> (t * bool * t)
      val find : elt -> t -> elt
      val find_opt : elt -> t -> elt option
      val find_first : f:(elt -> bool) -> t -> elt
      val find_first_opt : f:(elt -> bool) -> t -> elt option
      val find_last : f:(elt -> bool) -> t -> elt
      val find_last_opt : f:(elt -> bool) -> t -> elt option
      val of_list : elt list -> t
      val to_seq_from : elt -> t -> elt Seq.t
      val to_seq : t -> elt Seq.t
      val to_rev_seq : t -> elt Seq.t
      val add_seq : elt Seq.t -> t -> t
      val of_seq : elt Seq.t -> t
    end
  module Make :
  functor (Ord : OrderedType) ->
    sig
      type elt = Ord.t
      type t = Set.Make(Ord).t
      val empty : t
      val is_empty : t -> bool
      val mem : elt -> t -> bool
      val add : elt -> t -> t
      val singleton : elt -> t
      val remove : elt -> t -> t
      val union : t -> t -> t
      val inter : t -> t -> t
      val disjoint : t -> t -> bool
      val diff : t -> t -> t
      val compare : t -> t -> int
      val equal : t -> t -> bool
      val subset : t -> t -> bool
      val iter : f:(elt -> unit) -> t -> unit
      val map : f:(elt -> elt) -> t -> t
      val fold : f:(elt -> 'a -> 'a) -> t -> init:'a -> 'a
      val for_all : f:(elt -> bool) -> t -> bool
      val exists : f:(elt -> bool) -> t -> bool
      val filter : f:(elt -> bool) -> t -> t
      val filter_map : f:(elt -> elt option) -> t -> t
      val partition : f:(elt -> bool) -> t -> (t * t)
      val cardinal : t -> int
      val elements : t -> elt list
      val min_elt : t -> elt
      val min_elt_opt : t -> elt option
      val max_elt : t -> elt
      val max_elt_opt : t -> elt option
      val choose : t -> elt
      val choose_opt : t -> elt option
      val split : elt -> t -> (t * bool * t)
      val find : elt -> t -> elt
      val find_opt : elt -> t -> elt option
      val find_first : f:(elt -> bool) -> t -> elt
      val find_first_opt : f:(elt -> bool) -> t -> elt option
      val find_last : f:(elt -> bool) -> t -> elt
      val find_last_opt : f:(elt -> bool) -> t -> elt option
      val of_list : elt list -> t
      val to_seq_from : elt -> t -> elt Seq.t
      val to_seq : t -> elt Seq.t
      val to_rev_seq : t -> elt Seq.t
      val add_seq : elt Seq.t -> t -> t
      val of_seq : elt Seq.t -> t
    end
end
