%hashes are unordered @array's where the keys are strings instead of integers. Learn them. They are the most important part of perl that you should be learning.
I already showed you the code for reading and writing the votes in a %hash data structure to a file.
Also, add use strict; and use warnings; to the beginning of your script, and since this is CGI, CGI::Carp as well.
use CGI ':standard';
use CGI::Carp qw(fatalsToBrowser);
use strict;
use warnings;
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