Update extended_euclidean_algorithm.py

Author: dhruvmanila

maths/extended_euclidean_algorithm.py

@@ -14,9 +14,10 @@
 # @Last modified time: 2020-10-02
 
 import sys
+from typing import Tuple
 
 
-def extended_euclidean_algorithm(a: int, b: int) -> (int, int):
+def extended_euclidean_algorithm(a: int, b: int) -> Tuple[int, int]:
     """
     Extended Euclidean Algorithm.