changes made in *iterating_through_submasks.py

dynamic_programming/checking request.py

@@ -0,0 +1 @@
+import request

dynamic_programming/iterating_through_submasks.py

@@ -5,9 +5,10 @@ You are given a bitmask m and you want to efficiently iterate through all of
 its submasks. The mask s is submask of m if only bits that were included in
 bitmask are set
 """
+from typing import List
 
 
-def list_of_submasks(mask) -> list:
+def list_of_submasks(mask: int) -> List[int]:
 
     """
     Args: