namespace _116._Populating_Next_Right_Pointers_in_Each_Node;

// Definition for a Node.
public class Node
{
    public int val;
    public Node? left;
    public Node? right;
    public Node? next;

    public Node() { }

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

    public Node(int _val, Node? _left, Node? _right, Node? _next)
    {
        val = _val;
        left = _left;
        right = _right;
        next = _next;
    }
}