#include <stdio.h>
#include <math.h>

int main(void)
{
	while (1) {
		double x,y,r,xx;
		scanf("%lf %lf ",&x, &y);
		if (x==0 && y==0) break;

		r=x*x+y*y;
		xx=(0.5*M_PI*r)/50.0;
//		printf("%.5f %.5f\n",r,xx);

		printf("The property will be flooded in hour %.0f.\n",xx+0.5);
	}

	return 0;
}