fix(llrbt): fix code block

      root->size = size(root->lc) + size(root->rc) + 1;

      return root;

    }

    ```

    template<class Key, class Compare>

    typename Set<Key, Compare>::Node *

      }

      return root;

    }

    ```

    template<class Key, class Compare>

    typename Set<Key, Compare>::Node *

        }

      }

      return fix_up(root);

    ```

    }

    ```

    #include <algorithm>

    #include <memory>

    #include <vector>

    ```

    template<class Key, class Compare = std::less<Key>>

    class Set {

    private: