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

int main()
{

float x, y, S;

do{
	scanf("%f %f",&x, &y);
	if (x == 0 && y == 0) break;
	S = M_PI_2*(x*x+y*y)/50;
	printf("The property will be flooded in hour %d.\n", (int)(S)+1);
} while(1);

return 0;
}