矩阵乘法

def matmul(m1,m2):
    res=[[0]*len(m2[0]) for _ in range(len(m1))]
    for y in range(len(m1)):
        for x in range(len(m2[0])):
            n=0
            for a,b in zip(m1[y],(line[x] for line in m2)):
                n+=a*b
            res[y][x]=n
    return res

n,m,k=map(int,input().split())
m1=[]
for _ in range(n):
    row=list(map(int,input().split()))
    m1.append(row)
m2=[]
for _ in range(m):
    row=list(map(int,input().split()))
    m2.append(row)
result=matmul(m1,m2)
for line in result:
    print(' '.join(map(str,line)))