13 lines
627 B
MiniZinc
13 lines
627 B
MiniZinc
predicate fzn_reachable_reif(int: N, int: E, array[int] of int: from, array[int] of int: to,
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var int: r, array[int] of var bool: ns, array[int] of var bool: es,
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var bool: b) =
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let {
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array[1..2*E] of int: dfrom = from ++ to;
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array[1..2*E] of int: dto = to ++ from;
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array[1..2*E] of var bool: des = es ++ es;
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} in
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/* duplicate the edges so that the we can use directed graph reachability */
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b <-> dreachable(N,2*E,dfrom,dto,r,ns,des);
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%-----------------------------------------------------------------------------%
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