------ art_22002_2627173.1137958322743 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline That's a neat way to go about it. That's how I wrote my check_fold--exploring backwards from the final stack, and throwing out paths that were obviously wrong--but I never thought of implementing the entire thing using backwards folds. On 1/22/06, Simon Kröçer <SimonKroeger / gmx.de> wrote: > > Hi, > > i hope there is something new in my solution. Rather than folding my > solution unfolds and keeps track of the position of a certain layer. It > starts with a 1x1 stack of paper and undos all cmds that leed to this > stack (doubling the size of the paper each step). Doing this for every > layer of the stack gives the solution to this quiz. (no arrays, > matrixes, etc. needed except for returning the result) > ------ art_22002_2627173.1137958322743--