class Node<T>
{
public T Value { get; set; }
public Node<T> Left { get; set; }
public Node<T> Right { get; set; }
public Node(T value, Node<T> left, Node<T> right)
{
Value = value;
Left = left;
Right = right;
}
public Node(T value) : this(value, null, null) { }
}