#1173. C++11级 矩阵上下反转

C++11级 矩阵上下反转

image image

Samples

3 4
7 6 4 7
10 4 4 9
2 2 4 8
2 2 4 8
10 4 4 9
7 6 4 7

Limitation

1s, 1024KiB for each test case.