public class Sqrt {
 public static void main(String[] args) {
 double target = 2013;
 double x = 1;
 double oldx;
 do {
 oldx = x;
 x = (x + target / x) / 2;
 }
 while (oldx != x);
 System.out.println(x);
 System.out.println(x*x);
 }
}