private static void Helper(LeetCode1379TreeNode o, LeetCode1379TreeNode c, LeetCode1379TreeNode t)
        {
            if (o == null)
            {
                return;
            }

            Helper(o.left, c.left, t);

            if (o == t)
            {
                ans = c;
            }

            Helper(o.right, c.right, t);
        }
        public static LeetCode1379TreeNode GetTargetCopy(LeetCode1379TreeNode original, LeetCode1379TreeNode cloned, LeetCode1379TreeNode target)
        {
            Helper(original, cloned, target);

            return(ans);
        }