#include <hpgcc49.h>


#define  sys_slowOff()
#define  sys_slowOn()


int main(void)
{
	double a, b, c;

	sys_slowOff();

	a = sat_pop_real();
	b = sat_pop_real();

	if(CHECK_ARGS(a, b))
	{
		sat_push_real(a);
		sat_push_real(b);
		PUSH_EXIT_STATUS(1);
 		sys_slowOn();
		return(0);
	}

	while(fabs(a - b) > 1e-10)
	{
		c = a;
		a = (a + b) / 2;
		b = sqrt(b * c);
		if(keyb_isAnyKeyPressed())
			break;
	}

	sat_push_real((a + b) / 2);
	PUSH_EXIT_STATUS(0);

	sys_slowOn();
	return(0);
}