#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#define MAX 100

int main() {
  int  s=0,t=0;
  double x, y, r, v;
  
  scanf("%lf %lf", &x, &y);  
  while ((x!=0.0) || (y!=0.0)) {
    s=0;t=0;r=0;
    v= sqrt(x*x + y*y);    
    while (v > r) {
      t++;
      s+=50;
      r = sqrt((2*(double)s) / M_PI);      
    }
    
    printf("The property will be flooded in hour %d.\n", t);
    
    scanf("%lf %lf", &x, &y);
  } 
  return 0;
}