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use strict;
use warnings;
...
0,2,0,0,0,0,0,0,3,0,1,0,0,0,0,0,0,0,3
0,2,0,0,0,0,0,0,4,0,-5.5,0,0,0,0,0,0,0,3

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```
1
-1
-5.5
```