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id = 148
group = 'license_plates'
number = 55
visible = True
facts = None
solution = '''\
conc148([], L, L).
conc148([H|T], L2, [H|L]) :-
conc148(T, L2, L).
memb148(X, [X|_]).
memb148(X, [_|T]) :-
memb148(X, T).
getdigits148([], []).
getdigits148([X|T], [X|NT]) :-
number(X), !,
getdigits148(T, NT).
getdigits148([_|T], NT) :-
getdigits148(T, NT).
joindigits148([X], [X]).
joindigits148([X,Y|T], NT) :-
XY is 10*X + Y,
joindigits148([XY|T], NT).
joindigits148([X,Y|T], [X|NT]) :-
joindigits148([Y|T], NT).
genexp148([Exp], Exp).
genexp148(L, Exp) :-
conc148(Before, [N1,N2|After], L),
memb148(Op, ['+','-','*','/']),
NExp =.. [Op, N1, N2],
conc148(Before, [NExp|After], L1),
genexp148(L1, Exp).
firstMinus148(L, L).
firstMinus148([X|T], [Y|T]) :-
Y is -X.
checkLicensePlate(LP, E1, E2) :-
getdigits148(LP, Digs),
conc148(L1, L2, Digs),
joindigits148(L1, N1),
joindigits148(L2, N2),
firstMinus148(N1, MN1),
firstMinus148(N2, MN2),
genexp148(MN1, E1),
genexp148(MN2, E2),
E1 =:= E2.
'''
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