#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/convex_hull_2.h>
#include <vector>
typedef std::vector<Point_2> Points;
int main()
{
Points points, result;
std::cout << result.size() << " points on the convex hull" << std::endl;
return 0;
}