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

int main()
{
  float fx,fy;
  int x,y;
  float r;
  
  while(1)
  {
    scanf("%f %f",&fx,&fy);
    if (fx == 0 && fy == 0) break;
    r = sqrt(fx*fx+fy*fy);
    float S = M_PI*r*r/2.0;
    int hours = (S+50)/50;
    printf("The property will be flooded in hour %d.\n", hours);
  }
  return 0;
}