int sum(struct TreeNode*  root,int preTmp)
{
    if(root == NULL)
    {
        return 0;
    }
   int sumTmp = preTmp*10+root->val;
   if(root->left == NULL && root->right == NULL)
   {
       return sumTmp;
   }
   else
   {
       return sum(root->left,sumTmp)+sum(root->right,sumTmp);
   }
}

int sumNumbers(struct TreeNode* root){
    return sum(root,0);
}