题解 | #矩阵乘法#

matrix_1_n = int(input())
matrix_m = int(input())
matrix_2_k = int(input())

matrix_1 = []
for _ in range(matrix_1_n): # 行
    matrix_1.append(list(map(lambda x: int(x), input().split())))

matrix_2 = []
for _ in range(matrix_m):
    matrix_2.append(list(map(lambda x: int(x), input().split())))

matrix_0 = [0 for _ in range(matrix_2_k)]
matrix = [matrix_0.copy() for _ in range(matrix_1_n)]
for i in range(matrix_1_n):
    for j in range(matrix_2_k):
        for k in range(matrix_m):
            matrix[i][j] += matrix_1[i][k] * matrix_2[k][j]

for i in matrix:
    for j in i:
        print(j, end=' ')
    print()

直接套用公式来编码