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


int main(void)
{
int i;
float x,y,lensqr;

	/* sqrt(100/Pi)=r */
	for (;;) {
		i=scanf("%f %f",&x,&y);
		assert(i==2);
		if (x==0 && y==0)
			break;
		lensqr=x*x+y*y;
		printf("The property will be flooded in hour %d.\n",
				(int)(M_PI*lensqr/50/2)+1);
		}
	return 0;
}