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#include <CGAL/Exact_integer.h>
#include <CGAL/Extended_homogeneous.h>
#include <CGAL/Nef_polyhedron_3.h>
typedef CGAL::Exact_integer NT;
typedef CGAL::Extended_homogeneous<NT> Kernel;
typedef CGAL::Nef_polyhedron_3<Kernel> Nef_polyhedron;
typedef Nef_polyhedron::Plane_3 Plane_3;
int main() {
Nef_polyhedron N1(Plane_3( 1, 0, 0,-1),Nef_polyhedron::INCLUDED);
Nef_polyhedron N2(Plane_3(-1, 0, 0,-1),Nef_polyhedron::INCLUDED);
Nef_polyhedron N3(Plane_3( 0, 1, 0,-1),Nef_polyhedron::INCLUDED);
Nef_polyhedron N4(Plane_3( 0,-1, 0,-1),Nef_polyhedron::INCLUDED);
Nef_polyhedron N5(Plane_3( 0, 0, 1,-1),Nef_polyhedron::INCLUDED);
Nef_polyhedron N6(Plane_3( 0, 0,-1,-1),Nef_polyhedron::INCLUDED);
Nef_polyhedron I1(!N1+!N2);
Nef_polyhedron I2(N3-!N4);
Nef_polyhedron I3(N5^N6);
Nef_polyhedron Cube1(I2 *!I1);
Cube1 *= !I3;
Nef_polyhedron Cube2 = N1 * N2 * N3 * N4 * N5 * N6;
CGAL_assertion (Cube1 == Cube2);
return 0;
}
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