I will ignore the 'print Dumper' line and concentrate on your $VAR1 (which is a hash reference).

My understanding of your question is:
'365' and '302' are examples of keys in a hash whose hash values are a reference to a hash of hashes.

To retrive the values '365' and '302' you need just use:

my @hash_refs = keys %{$VAR1};
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Then again, I could be misinterpreting your question!
If you are still in doubt, post a useful code snippet.

EXAMPLE

#!/usr/bin/perl -w
use strict;

my $VAR1 = { '365' => { foo=>1, bar=>2 }, '302' => {} };
my @hash_refs = keys %{$VAR1};

print "My hash refs are: ".join (', ',@hash_refs)."\n";
print "The value of my hash refs are: ".join(', ', values %{$VAR1})."\
+n\n";

my %tmp = %$VAR1;
print "'bar' in '365' is: ".$tmp{'365'}->{bar}."\n";
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--
Graq