(***********************************************************************)
(*                                                                     *)
(*                                OCaml                                *)
(*                                                                     *)
(*            Xavier Leroy, projet Cristal, INRIA Rocquencourt         *)
(*                                                                     *)
(*  Copyright 1996 Institut National de Recherche en Informatique et   *)
(*  en Automatique.  All rights reserved.  This file is distributed    *)
(*  under the terms of the Q Public License version 1.0.               *)
(*                                                                     *)
(***********************************************************************)

let rec tak (x, y, z) =
  if x > y then tak(tak (x-1, y, z), tak (y-1, z, x), tak (z-1, x, y))
           else z

let rec repeat n =
  if n <= 0 then 0 else tak(18,12,6) + repeat(n-1)

let _ = print_int (repeat 2000); print_newline(); exit 0