/* Solution 1: */
int main(int argc, char* argv[])
{
	if( argc == 2 || main( 2, NULL ) )
	{
		printf("Hello ");
	}
	else
	{
		printf("World\n");
	}
	return 0;
}
/* Solution 2 (Only for Unix and Linux): */
int main(int argc, char* argv[])
{
	if( !fork() )
	{
		printf("Hello ");
	}
	else
	{
		printf("World\n");
	}
	return 0;
}