I am assuming you are trying to take input in from the command line, in which case, you need to change line 3 to the following:

my @a=@ARGV;
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The @ARGV variable contains all of the command line arguments that are passed to the script, so if you called your script like this:

perl myscript.pl 1 15 5 7 3 99
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You would find that $ARGV[0] would be "1", $ARGV[1] would be "15", and so on.

TStanley
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