Get unique elemenets from Arrays

#!F:\Perl\bin\perl -w
use Data::Dumper;
use strict;

#unique elements from different arrays
my @array1 = (10,20,30);
my @array2 = (11,22,33);
my @array3 = (10,20,30);
my %uniq_arr;

for my $each (@array2, @array3, @array1) {
$uniq_arr{$each}++;
}
print "\n", $_ for (keys %uniq_arr),"\n";