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Answers and rating deltas for

How do i solve this "Notice: Undefined offset: on line 14"?

Author Votes Δ
James Black 2 +1.35
Sylence 1 +1.03
nickf 1 -0.49
halfdan 1 -0.26
Fabrizio 0 -2.99
Simone 0 -2.77
Last visited: Sep 14, 2014, 5:07:29 AM