Samples

1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25
1 4

16 17 18 19 20
6 7 8 9 10
11 12 13 14 15
1 2 3 4 5
21 22 23 24 25

Limitation

1s, 1024KiB for each test case.