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% nacteni: /* ['2.9.2_22.pl']. */ path(A,Z,Graf,Cesta,Cena) :- path1(A,[Z],0,Graf,Cesta,Cena). path1(A,[A|Cesta1],Cena1,_,[A|Cesta1],Cena1). path1(A,[Y|Cesta1],Cena1,Graf,Cesta,Cena) :- adjacent(X,Y,CenaXY,Graf), \+ member(X,Cesta1),Cena2 is Cena1+CenaXY, path1(A,[X,Y|Cesta1],Cena2,Graf,Cesta,Cena). adjacent(X,Y,CenaXY,Graf) :- member(X-Y/CenaXY,Graf);member(Y-X/CenaXY,Graf). start:- write('Cesta v grafu'),nl, nl, path(s, u, [s-t/3, t-v/1, t-u/5, u-t/2, v-u/2], Cesta, Cena), write('Cesta='), write(Cesta), nl, write('Cena='), write(Cena), nl, nl. ?-start.
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