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#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Polyhedron_3.h>
#include <CGAL/Nef_polyhedron_3.h>
#include <CGAL/IO/Nef_polyhedron_iostream_3.h>
typedef CGAL::Exact_predicates_exact_constructions_kernel Kernel;
typedef CGAL::Polyhedron_3<Kernel> Polyhedron;
typedef CGAL::Nef_polyhedron_3<Kernel> Nef_polyhedron;
int main() {
Polyhedron P;
std::cin >> P;
Nef_polyhedron N(P);
std::cout << "Exact_predicates_exact_constructions_kernel + SNC_indexed_items"
<< std::endl
<< " allows efficient handling of input "
"using floating point coordinates"
<< std::endl;
if(N.is_simple()) {
N.convert_to_polyhedron(P);
std::cout << P;
}
else {
std::cout << N;
}
}
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