[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

matrix/strassen_matrix_multiply.py

@@ -14,6 +14,7 @@
 
 Matrix = list[list[int]]
 
+
 def add(A: Matrix, B: Matrix) -> Matrix:
     n = len(A)
     return [[A[i][j] + B[i][j] for j in range(n)] for i in range(n)]