namespace _102._Binary_Tree_Level_Order_Traversal;


//Definition for a binary tree node.
public class TreeNode
{
    public int val;
    public TreeNode? left;
    public TreeNode? right;
    public TreeNode(int val = 0, TreeNode? left = null, TreeNode? right = null)
    {
        this.val = val;
        this.left = left;
        this.right = right;
    }
}