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

int main() {
    double x,y;
    double vzdal;
    int hodina;
    long s;
    
    while (1) {
	scanf("%lf%lf", &x, &y);
	if (fabs(x)<0.01 && fabs(y)<0.01) return 0;
	s = 0;
	vzdal = sqrt(x*x+y*y);
	hodina=0;
	while (1) {
	    s+=50;
	    hodina++;
	    if (sqrt(s/acos(0)) >= vzdal) {
		printf("The property will be flooded in hour %d.\n", hodina);
		break;
	    }
	}
	
    }
    
    return 0;
}