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I have a problem:
Farmer (marked with 'f' ), tiger ( 't'), goat ( 'g'), carrot ('c') want =
to cross the river by boat from the eastern side (marked with 'e') to =
the western side (marked with 'w').
Current state is defined by list. First element of the list represents =
f, second represents t, then g etc.=20
List (e w e w) represents state in which farmer and goat are on the =
eastern side of the river and tiger and carrot are on the western side.
Initial state is ( e e e e ) and final stateis ( w w w w ).
Construct a procedure which will describe the way threw all legal =
states, starting at the initial state and ending at the final state =
knowing that only f can drive the boat, that only two objects can be in =
the boat at the same time.
t and g can never stay alone at the same side of the river.
The same applies for g and c.
The program needs to contain recursive procedures.
example:
>(solve-ftgc '( e e e e ) '( w w w w )) ;; initial and final states
((E E E E) ;; initial state - all objects on the eastern side =
of the river
(W E W E) ;; f takes g to the western side
(E E W E) ;; f returnes alone to the eastern side
(W W W E) ;; f takes t to the western side
(E W E E) ;; f takes g back to the eastern side
(W W E W) ;;f takes c to the western side ( g stays at the =
eastern side )
(E W E W) ;;f returnes alone to the eastern side
(W W W W )) ;;f takes g to the western side, final state
Thank's!!!
Please send the solution to this problem!!!
e-mail: ·············@fer.hr
=20
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<DIV><FONT color=3D#000000 face=3DArial size=3D2>I have a =
problem:</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>Farmer (marked with 'f' =
), tiger (=20
't'), goat ( 'g'), carrot ('c') want to cross the river by boat from the =
eastern=20
side (marked with 'e') to the western side (marked with =
'w').</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2>Current state is =
defined by list.=20
First element of the list represents f, second represents t, then g etc. =
</FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial size=3D2></FONT><FONT =
face=3DArial size=3D2>List=20
(e w e w) represents state in which farmer and goat are on the eastern =
side of=20
the river and tiger and carrot are on the western side.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Initial state is ( e e e e ) and final =
stateis ( w=20
w w w ).</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Construct a procedure which will =
describe the way=20
threw all legal states, starting at the initial state and ending =
at the=20
final state knowing that only f can drive the boat, that only two =
objects can be=20
in the boat at the same time.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> t and g can never stay alone at =
the same side=20
of the river.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>The same applies for g and =
c.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>The program needs to contain recursive=20
procedures.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>example:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>>(solve-ftgc '( e e e e ) '( w w w w =
)) ;;=20
initial and final states</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>((E E E=20
E) ;; initial =
state =20
- all objects on the eastern side of the river</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>(W E W=20
E) ;; f takes g to the =
western=20
side</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>(E E W=20
E) ;; f returnes =
alone to=20
the eastern side</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>(W W W =
E) =20
;; f takes t to the western side</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>(E W E=20
E) ;; f takes g =
back to=20
the eastern side</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>(W W E =
W) =20
;;f takes c to the western side ( g stays at the eastern side =
)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>(E W E=20
W) ;;f returnes alone to =
the=20
eastern side</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>(W W W W )) ;;f =
takes g to=20
the western side, final state</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thank's!!!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Please send the solution to this=20
problem!!!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>e-mail: <A=20
····························@fer.hr">·············@fer.hr</A></FONT></DIV=
>
<DIV><FONT face=3DArial size=3D2> </FONT></DIV>
<DIV><FONT color=3D#000000 face=3DArial =
size=3D2></FONT> </DIV></BODY></HTML>
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In article <············@bagan.srce.hr>,
Nikola Kresic <·······@pinus.cc.fer.hr> wrote:
>Please send the solution to this problem!!!
Do your own homework!!!
If you're having trouble, post your partial solution and/or ask specific
questions. Don't just ask for the solution.
--
Barry Margolin, ······@bbnplanet.com
GTE Internetworking, Powered by BBN, Burlington, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.
In article <············@bagan.srce.hr>,
Nikola Kresic <·······@pinus.cc.fer.hr> wrote:
> Thank's!!!
> Please send the solution to this problem!!!
> e-mail: ·············@fer.hr
> =20
Do your homework for you, and then mail you the answer?
No thanks.
Also, please do not put a hundred lines of HTML coded garbage at
the end of your Usenet article.
This problem (I think in my copy of the Moscow puzzles the animals
involved are a goose and a fox but what ever) was discussed a few months
ago on this newgroup. My advice would to search deja.com.
Cheers,
:) will