OJ Board

Next time post in the existing thread.
Print a blank line between datasets.

Sorry I am new here...

I printed a blank line between datasets.

The input is:
2

0 3 22 -1 4
3 0 5 -1 -1
22 5 0 9 20
-1 -1 9 0 4
4 -1 20 4 0
5 17 8 3 1
1 1
3 5
2 4

0 3 22 -1 4
3 0 5 -1 -1
22 5 0 9 20
-1 -1 9 0 4
4 -1 ...

I have tried three kinds of output as follows but all show presentation error.

1. only a blank line between each dataset.
2. a blank line between each path of a dataset and additional blank line between dataset.
3. every path of all datasets is seperated by a blank line.

And all of them don't ...