17 lines
516 B
MiniZinc
17 lines
516 B
MiniZinc
include "all_different.mzn";
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predicate fzn_circuit(array[int] of var int: x) =
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let { set of int: S = index_set(x),
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int: l = min(S),
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int: n = card(S),
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array[S] of var 1..n: order
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} in
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all_different(x) /\
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all_different(order) /\
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forall(i in S)(x[i] != i) /\
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order[l] = 1 /\
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forall(i in S)(order[i] != n -> order[x[i]] = order[i] + 1) /\
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forall(i in S)(order[i] == n -> x[i] = l );
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%-----------------------------------------------------------------------------%
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