protected static Solver modelit() {
Solver solver = new Solver();
int n = 12;
IntVar[] vars = new IntVar[n];
for (int i = 0; i < vars.length; i++) {
vars[i] = VariableFactory.enumerated("Q_" + i, 1, n, solver);
}
for (int i = 0; i < n - 1; i++) {
for (int j = i + 1; j < n; j++) {
int k = j - i;
Constraint neq = IntConstraintFactory.arithm(vars[i], "!=", vars[j]);
solver.post(neq);
solver.post(IntConstraintFactory.arithm(vars[i], "!=", vars[j], "+", -k));
solver.post(IntConstraintFactory.arithm(vars[i], "!=", vars[j], "+", k));
}
}
return solver;
}
@Override
public void buildModel() {
/**
* 1 2 3 4 5 +---+---+---+---+---+ Given the list of words: 1 | 1 | | 2 | | 3 | AFT LASER
* +---+---+---+---+---+ ALE LEE 2 | # | # | | # | | EEL LINE +---+---+---+---+---+ HEEL SAILS 3
* | # | 4 | | 5 | | HIKE SHEET +---+---+---+---+---+ HOSES STEER 4 | 6 | # | 7 | | | KEEL TIE
* +---+---+---+---+---+ KNOT 5 | 8 | | | | | +---+---+---+---+---+ 6 | | # | # | | # | The
* numbers 1,2,3,4,5,6,7,8 in the crossword +---+---+---+---+---+ puzzle correspond to the words
*/
//
// variables
//
A = new IntVar[num_words][word_len];
// for labeling on A and E
all = new IntVar[(num_words * word_len) + N];
IntVar[] A_flat = new IntVar[num_words * word_len];
for (int I = 0; I < num_words; I++) {
for (int J = 0; J < word_len; J++) {
A[I][J] = VariableFactory.enumerated("A[" + I + "," + J + "]", 0, 26, solver);
A_flat[I * word_len + J] = A[I][J];
all[I * word_len + J] = A[I][J];
}
}
E = VariableFactory.boundedArray("E", N, 0, num_words, solver);
for (int I = 0; I < N; I++) {
all[num_words * word_len + I] = E[I];
}
//
// constraints
//
solver.post(IntConstraintFactory.alldifferent(E, "BC"));
for (int I = 0; I < num_words; I++) {
for (int J = 0; J < word_len; J++) {
solver.post(
IntConstraintFactory.arithm(A[I][J], "=", VariableFactory.fixed(AA[I][J], solver)));
}
}
for (int I = 0; I < num_overlapping; I++) {
/*
// MiniZinc
forall(i in 1..num_overlapping) (
A[E[overlapping[i,1]], overlapping[i,2]] = A[E[overlapping[i,3]], overlapping[i,4]]
)
*/
IntVar vv = VariableFactory.bounded("v_" + I, 0, num_words * word_len, solver);
IntVar w1 = VariableFactory.bounded("w1_" + I, 0, num_words * word_len, solver);
solver.post(
IntConstraintFactory.times(
E[overlapping[I][0]], VariableFactory.fixed(word_len, solver), w1));
IntVar s1 = VariableFactory.bounded("s1_" + I, 0, num_words * word_len * 2, solver);
solver.post(
IntConstraintFactory.sum(
new IntVar[] {w1, VariableFactory.fixed(overlapping[I][1], solver)}, s1));
solver.post(IntConstraintFactory.element(vv, A_flat, s1, 0));
IntVar w2 = VariableFactory.bounded("w2_" + I, 0, num_words * word_len, solver);
solver.post(
IntConstraintFactory.times(
E[overlapping[I][2]], VariableFactory.fixed(word_len, solver), w2));
IntVar s2 = VariableFactory.bounded("s2_" + I, 0, num_words * word_len * 2, solver);
solver.post(
IntConstraintFactory.sum(
new IntVar[] {w2, VariableFactory.fixed(overlapping[I][3], solver)}, s2));
solver.post(IntConstraintFactory.element(vv, A_flat, s2, 0));
}
}