namespace _589._N_ary_Tree_Preorder_Traversal;

// Definition for a Node.
public class Node
{
    public int val;
    public IList<Node>? children;

    public Node() { }

    public Node(int _val)
    {
        val = _val;
    }

    public Node(int _val, IList<Node> _children)
    {
        val = _val;
        children = _children;
    }
}