백준 2740 행렬 곱셈

https://www.acmicpc.net/problem/2740

2740번: 행렬 곱셈

a = []
b = []
n, m = map(int,input().split())
for i in range(n):
    a.append(list(map(int,input().split())))
m, k = map(int,input().split())
for i in range(m):
    b.append(list(map(int,input().split())))

result=[[0]*n]*k
for i in range(n):
    for j in range(k):
        sum = 0
        for l in range(m):
            sum += (a[i][l]*b[l][j])
        print(sum, end=' ')
    print()