Merge branch 'longArthSub' of https://github.com/tejaswi0910/Python into longArthSub

Author: tejaswi0910

Diff for: dynamic_programming/longest_arithmetic_subsequence.py

@@ -9,6 +9,7 @@
   seq.length - 1).
 """
 
+
 def longest_arithmetic_subsequence(nums: list[int]) -> int:
     """
     Finds the length of the longest arithmetic subsequence in a given array of integers.
@@ -40,7 +41,7 @@ def longest_arithmetic_subsequence(nums: list[int]) -> int:
     """
     if nums is None:
         raise ValueError("Input array cannot be None")
-    
+
     if len(nums) == 0:
         return 0
 
@@ -61,6 +62,7 @@ def longest_arithmetic_subsequence(nums: list[int]) -> int:
 
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()
     # Sample test case
     nums = [3, 6, 9, 12]