upd

org/study_deck_02/dsa/trees/0297-serialize-and-deserialize-binary-tree.org

@@ -38,7 +38,7 @@ Output: []
 Write your approach here.
 
 ** TODO Python
-#+begin_src python
+#+begin_src python :lc-problem 297 :lc-lang python3
 # Definition for a binary tree node.
 # class TreeNode(object):
 #     def __init__(self, x):
@@ -71,7 +71,7 @@ class Codec:
 #+end_src
 
 ** TODO C++
-#+begin_src cpp
+#+begin_src cpp :lc-problem 297
 /**
  * Definition for a binary tree node.
  * struct TreeNode {