#include<stdio.h>
#include<math.h>
double x,y,d,s,t;
int main(void){
    scanf("%lf %lf",&x,&y);
    while((x!=0)||(y!=0)){
	s=(x*x + y*y)*M_PI/2;
	t=(s/50.0)+1;
	printf("The property will be flooded in hour %d.\n",(int) t);
	scanf("%lf %lf",&x,&y);
    }
return 0;
}