#include <boost/numeric/interval.hpp>
#include <iostream>

using namespace boost::numeric;
using namespace interval_lib;

typedef interval<double> val;

int main() {
  val x(1U), y(1);
  std::cout << x.lower() << " " << x.upper() << std::endl;
  std::cout << y.lower() << " " << y.upper() << std::endl;
  return 0;
}