public void sumNumber(TreeNode root,int num,Integer sum){
        if(root ==null) return;
        num = num *10 + root.val;
        if(root.right==null && root.left==null){
        	sum+=num;
        }else{
            sumNumber(root.left,num,sum);
            sumNumber(root.right,num,sum);
        }
        
        num /= 10;
    }