rev.pl

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description
owner Johannes Waldmann
uploaded 2017-08-17 03:45:07.0
disk size 241 Bytes
downloadable true
type
attribute value
name no_type
processor id 1
description this is the default benchmark type for rejected benchmarks and benchmarks that are not associated with a type.
owning community none
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%query: rev(i,o).

/* from Huet, Hullot, 1982 */

rev([],[]).
rev([X|XS],[Y|YS]) :- rev1(X,XS,Y), rev2(X,XS,YS).
rev1(X,[],X).
rev1(X,[Y|YS],Z) :- rev1(Y,YS,Z).
rev2(X,[],[]).
rev2(X,[Y|YS],ZS) :- rev2(Y,YS,US), rev(US,VS), rev([X|VS], ZS).
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