Fix type error in strassen_matrix_multiplication.py (#8784)

* Fix type error in strassen_matrix_multiplication.py

* updating DIRECTORY.md

---------

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

Author: tianyizheng02

DIRECTORY.md

@@ -294,6 +294,7 @@
   * [Mergesort](divide_and_conquer/mergesort.py)
   * [Peak](divide_and_conquer/peak.py)
   * [Power](divide_and_conquer/power.py)
+  * [Strassen Matrix Multiplication](divide_and_conquer/strassen_matrix_multiplication.py)
 
 ## Dynamic Programming
   * [Abbreviation](dynamic_programming/abbreviation.py)

divide_and_conquer/strassen_matrix_multiplication.py.BROKEN divide_and_conquer/strassen_matrix_multiplication.py

@@ -112,17 +112,19 @@ def strassen(matrix1: list, matrix2: list) -> list:
     [[139, 163], [121, 134], [100, 121]]
     """
     if matrix_dimensions(matrix1)[1] != matrix_dimensions(matrix2)[0]:
-        raise Exception(
-            "Unable to multiply these matrices, please check the dimensions. \n"
-            f"Matrix A:{matrix1} \nMatrix B:{matrix2}"
+        msg = (
+            "Unable to multiply these matrices, please check the dimensions.\n"
+            f"Matrix A: {matrix1}\n"
+            f"Matrix B: {matrix2}"
         )
+        raise Exception(msg)
     dimension1 = matrix_dimensions(matrix1)
     dimension2 = matrix_dimensions(matrix2)
 
     if dimension1[0] == dimension1[1] and dimension2[0] == dimension2[1]:
         return [matrix1, matrix2]
 
-    maximum = max(dimension1, dimension2)
+    maximum = max(*dimension1, *dimension2)
     maxim = int(math.pow(2, math.ceil(math.log2(maximum))))
     new_matrix1 = matrix1
     new_matrix2 = matrix2