int main()
{
    try
    {
	test();
    }
    catch (std::exception& e)
    {
	std::cout << "unexpected exception: " << e.what() << std::endl;
	exit(2);
    }
    std::cout << "done" << std::endl;
    return 0;
}
int main()
{
    try
    {
	test();
    }
    catch (std::exception& e)
    {
	std::cout << "unexpected exception: " << e.what() << std::endl;
	exit(2);
    }
    std::cout << "done" << std::endl;
    return 0;
}