import java.util.*;
class arr_tree
{
	private ArrayList<ele_tree> children=new ArrayList<ele_tree>();
	private int parent;
	public void addChild(int child,int rel)
	{
		ele_tree p=new ele_tree();
		p.assignChild(child);
		p.assignRelation(rel);
	 children.add(p);
	}
	public void setParent(int par)
	{
		parent=par;
	}
	public int getChildreSize()
	{
		return children.size();
	}
	public  ArrayList<ele_tree> getChild()
	{
		return children;
	}
	public int getParent()
	{
		return parent;
	}
	
}