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/* | |
Personen: | |
Potter, Malfoy, Ron und Hermione | |
Benötigte Positionen: | |
- Vorsitzender | |
- Kassenwart | |
- Sekretär | |
Regeln: | |
- Potter und Malfoy wollen nicht gemeinsam in den Vorstand. | |
- Malfoy steht nur für den Vorstand zur Verfügung, wenn Granger Vorsitzende wird. | |
- Weasley geht nur dann in den Vorstand, wenn auch Potter diesem angehört. | |
- Potter will nicht in den Vorstand, wenn Granger nur Sekretärin wird. | |
- Granger tritt dem Vorstand nicht bei, falls Weasley Vorsitzender wird. | |
*/ | |
possible( (P,T,S) ) :- kandidat(P), kandidat(T), kandidat(S), | |
alldiff(P,T,S), | |
rule1( [P,T,S] ), | |
rule2( (P,T,S) ), | |
rule3( (P,T,S) ), | |
rule4( (P,T,S) ), | |
rule5( (P,T,S) ). | |
kandidat(p). | |
kandidat(m). | |
kandidat(w). | |
kandidat(g). | |
alldiff(P,T,S) :- diff(P,T), diff(T,S), diff(S,P). | |
diff(A,B) :- A \= B. | |
rule1(V) :- notIn(V,m). | |
rule1(V) :- notIn(V,p). | |
rule2( (P,T,S) ) :- notIn( [P,T,S] , m). | |
rule2( (P,T,S) ) :- in( [P,T,S], m), president( (P,T,S), g). | |
rule3( (P,T,S) ) :- notIn( [P,T,S], w). | |
rule3( (P,T,S) ) :- in( [P,T,S], w), in( [P,T,S], p). | |
rule4( (P,T,S) ) :- notSecretary( (P,T,S), g). | |
rule4( (P,T,S) ) :- notIn( [P,T,S], p). | |
rule5( (P,T,S) ) :- notPresident((P,T,S), w). | |
rule5( (P,T,S) ) :- notIn([P,T,S], g). | |
in([X | _], X). | |
in([_ | Xs], A) :- in(Xs, A). | |
notIn([], _). | |
notIn([X | Xs], A) :- diff(X,A), notIn(Xs, A). | |
secretary( (_,_,S) , S). | |
president( (P,_,_) , P). | |
treasurer( (_,T,_) , T). | |
notSecretary( (_,_,S) , X) :- S \= X. | |
notPresident( (P,_,_) , X) :- P \= X. | |
notTreasurer( (_,T,_) , X) :- T \= X. |
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