题解 | #矩阵乘法#
矩阵乘法
https://www.nowcoder.com/practice/ebe941260f8c4210aa8c17e99cbc663b
import sys
x, y, z = int(input().strip()), int(input().strip()), int(input().strip())
ma = [list(map(int, input().strip().split())) for i in range(x)]
mb = [list(map(int, input().strip().split())) for i in range(y)]
def matrix_multiply(la, lb):
res = 0
for i in range(len(la)):
res += la[i] * lb[i]
return res
def col_list(matrix, col):
res = []
for i in matrix:
res.append(i[col])
return res
mbc = [col_list(mb, i) for i in range(z)]
res = [[0 for j in range(z)] for i in range(x)]
for i in range(x):
for j in range(z):
res[i][j] = matrix_multiply(ma[i], mbc[j])
for i in range(len(res)):
print(*res[i], sep=' ')
