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

int main(void) {
  float X, Y;
  float rrr;
  long int rst;
  scanf("%f %f", &X, &Y);
  while ( !(X == 0 && Y == 0)) {
    rrr = 3.1415*(X*X + Y*Y)/2;
    rst = (rrr / 50) - 2;
    while (rst*50 <= rrr) rst++;
    printf("The property will be flooded in hour %d.\n", rst);
    scanf("%f %f", &X, &Y);
  }
  return 0;
}