Fix sphinx/build_docs warnings for greedy_methods (#12463)

* updating DIRECTORY.md

* Fix sphinx/build_docs warnings for greedy_methods

* Improve

---------

Co-authored-by: MaximSmolskiy <[email protected]>

Author: MaximSmolskiy

greedy_methods/smallest_range.py

@@ -14,12 +14,13 @@ def smallest_range(nums: list[list[int]]) -> list[int]:
     Uses min heap for efficiency. The range includes at least one number from each list.
 
     Args:
-        nums: List of k sorted integer lists.
+        `nums`: List of k sorted integer lists.
 
     Returns:
         list: Smallest range as a two-element list.
 
     Examples:
+
     >>> smallest_range([[4, 10, 15, 24, 26], [0, 9, 12, 20], [5, 18, 22, 30]])
     [20, 24]
     >>> smallest_range([[1, 2, 3], [1, 2, 3], [1, 2, 3]])