Jip J. Dekker
1d9faf38de
git-subtree-dir: software/gecode git-subtree-split: 313e87646da4fc2752a70e83df16d993121a8e40
25 lines
801 B
MiniZinc
25 lines
801 B
MiniZinc
include "global_cardinality_low_up_closed.mzn";
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/** @group globals.alldifferent
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Constrain the array of integers \a vs to be all different except those
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elements that are assigned the value 0.
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*/
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predicate fzn_alldifferent_except_0(array[int] of var int: vs) =
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if length(vs)==0 then true
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else
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let {
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int: l = lb_array(vs);
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int: u = ub_array(vs);
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} in
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if l != -infinity /\ u != infinity then
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global_cardinality_low_up_closed(vs, [i | i in l..u],
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[0 | i in l..u],
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[if i==0 then length(vs) else 1 endif | i in l..u]
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)
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else
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forall(i, j in index_set(vs) where i < j) (
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(vs[i] != 0 /\ vs[j] != 0) -> vs[i] != vs[j]
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)
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endif
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endif;
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