module Mark:sig..end
Marking below)typegraph =Sig_pack.S.t
typevertex =Sig_pack.S.V.t
val clear : Sig_pack.S.t -> unitclear g sets all marks to 0 from all the vertives of g.val get : Sig_pack.S.V.t -> int
val set : Sig_pack.S.V.t -> int -> unit