fix divide_and_conquer-folder

Author: algobytewise

divide_and_conquer/max_difference_pair.py

@@ -1,7 +1,7 @@
-from typing import List
+from typing import List, Tuple
 
 
-def max_difference(a: List[int]) -> (int, int):
+def max_difference(a: List[int]) -> Tuple[int, int]:
     """
     We are given an array A[1..n] of integers, n >= 1. We want to
     find a pair of indices (i, j) such that

divide_and_conquer/strassen_matrix_multiplication.py

@@ -121,7 +121,7 @@ def strassen(matrix1: list, matrix2: list) -> list:
     dimension2 = matrix_dimensions(matrix2)
 
     if dimension1[0] == dimension1[1] and dimension2[0] == dimension2[1]:
-        return matrix1, matrix2
+        return [matrix1, matrix2]
 
     maximum = max(max(dimension1), max(dimension2))
     maxim = int(math.pow(2, math.ceil(math.log2(maximum))))