import java.util.*;

public class GreedyAlgorithm {
  public static void main(String[] args) {
    Sqrt s = new Sqrt(5);
    GreedyAlgorithm.run(s);
  }
  
  public static void run(Solution sNow) {
    int stayCount = 0;
    while (stayCount < 100) {
      if (sNow.improve()) {
        stayCount = 0;
        System.out.println(sNow.toString());
      }
      else  stayCount++;
    }
  }
}

interface Solution { boolean  improve(); }

class Sqrt implements Solution {
  double now = 0.0, y = 5.0;
  Random random = new Random();
  
  public Sqrt(double py) { y = py;}
  
  public boolean improve() {
  	double next = now+random.nextDouble()/100;
    if (score(next) > score(now)) {
    	now = next;
      	return true;
    }
    return false;
  } 
  
  double score(double v) {
  	return -Math.abs(v*v-y);
  }
  
  public String toString() {
  	return "square("+now+")="+(now*now);
  }
}