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dekker.one
1include "tree.mzn";
2include "subgraph.mzn";
3
4predicate fzn_dpath(int: N, int: E, array[int] of int: from, array[int] of int: to,
5 var int: s, var int: t, array[int] of var bool: ns, array[int] of var bool: es) =
6 dtree(N,E,from,to,s,ns,es) /\
7 dtree(N,E,to,from,t,ns,es);
8
9%-----------------------------------------------------------------------------%