import java.util.*; 
import java.awt.*; 
import javax.swing.*; 

class Foam extends ArrayList<Circle> {
  JLabel statusBar; 
  Foam(JLabel statusBar) {
    this.statusBar = statusBar; 
  }
  void draw(Graphics g) {
    for (Circle circle : this) {
      circle.draw(g);  
    }
  }
  int points = 0;
  void clean() {
    for (int i = 0; i < this.size(); i++) { // the enhanced for is not recommended here 
      Circle c = this.get(i); 
      if (c.neighbors.size() >= 3) {
        for (int j = 0; j < c.neighbors.size(); j++) {
          Circle n = c.neighbors.get(j); 
          n.neighbors.remove(c); 
        }
        this.points += 1; 
        this.statusBar.setText("Total: " + this.points); 
        this.remove(c); 
      }
    }
  }
  boolean rearranges() {
    int count = 0; 
    for (Circle c : this) {
      if (c.fall()) {
        count += 1;  
      }
    }
    this.clean(); 
    return count > 0;
  }
}