Hi guys, what did that mean " Probably, the solution is executed with error 'uninitialized value usage' on the line 38 " ?

and thank's in advance

Does anyone know how can I download the full test cases for a particular problem? And if this is not possible, WHY is it not possible? Is that intentional?

One of my problems failed today and I wanted to debug it, but the test case is truncated because it's too long. Thank's