static class Fract
{
    inline bool ismandel(double RP,double IP)
    {
    	if(IP<-1.15 || IP>1.15
    	|| RP<-2.02 || RP>0.5)return false;
    	
        register double r = RP, i = IP;
        for(register int c=0; ; )
        {
            register const double r2 = r*r;
            register const double i2 = i*i;
            
            if(r2+i2 >= 4)
            {
                /* Would never return back to <4. Not part of set. Exit. */
                return false;
            }
            
            i = r*i*2 + IP;
            r = r2-i2 + RP;
            
            if(++c >= maxiter)
            {
                /* Tried enough. We are inside. */
                return true;
            }
        }
    }

    inline bool isjulia(double XP,double YP, double RP,double IP)
    {
    	if(!ismandel(RP, IP))return false;
    	if(XP<-2 || XP>2
    	|| YP<-2 || YP>2)return false;
    	
        register double r = XP, i = YP;
        for(register int c=0; ; )
        {
            register const double r2 = r*r;
            register const double i2 = i*i;
            
            if(r2+i2 >= 4)
            {
                /* Would never return back to <4. Not part of set. Exit. */
                return false;
            }
            
            i = r*i*2 + IP;
            r = r2-i2 + RP;
            
            if(++c >= maxiter)
            {
                /* Tried enough. We are inside. */
                return true;
            }
        }
    }
    
public:
    
    inline bool hit(double x,double y, double r,double i)
    {
        return isjulia(x,y,r,i);
    }
} Fract;