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

int main()
{
  float x, y, pol_kruh, hypot;
  scanf("%f%f", &x, &y);
  while (x || y)
  {
    hypot = pow(x, 2) + pow(y, 2);
    pol_kruh = hypot * M_PI / 2;
    printf("The property will be flooded in hour %d.\n", int(pol_kruh / 50) +1);
    scanf("%f%f", &x, &y);
  }
  return 0;
}