2876: 矩阵交换行

解题思路:

注意事项:

参考代码:

l = []

for i in range(5):

    s = list(input().strip().split())

    l.append(s)

a,b = map(int,input().split())

t = l[a-1]

l[a-1] = l[b-1]

l[b-1] = t

for i in l:

    print(" ".join(i))