#!/usr/bin/perl --
use strict;
use warnings;
use Data::Dump qw/ dd pp /;
my @ints = qw/ 0 0 0 1 1 2 9 11 11 20 22 22 55 /;



#~ my $power     = 8; my $repeat    = 0;
#~ my $power     = 2; my $repeat    = 14;
#~ my $power     = 1; my $repeat    = 28;
my $power     = 3; my $repeat    = 7;

#~ my $power     = 28; my $repeat    = 8; ## (chr(0)x2**28)x8

my $max       = 2**$power;
my $maxminone = $max-1;
my @seen_vecs = ( chr(0) x $max ) x $repeat;;
@seen_vecs = '' unless@seen_vecs ;

dd\@seen_vecs;

print "\n(2**$power=($max)*8=(l@{[$max*8]}))x[$repeat]\n";
print "max bit \@v[$repeat][@{[$max*8]}]\n\n";
my @uniq ;
for my $int( @ints ){
    my $index  = $int >> $power;
    my $offset = $int & $maxminone ;
#~     my $vec = \vec( $seen_vecs[ $int >> $power ], $int & $maxminone , 1);;
    my $vec = \vec( $seen_vecs[ $index ], $offset, 1);;
    next if $$vec ; ## skip if seen ## $seen...[$index]->get( $offset );
    push @uniq, $int;
    $$vec=1;        ## mark as seen ## $seen...[$index]->set( $offset );
    printf "%3u@[%2u][%2u]= %s\n", $int , $index, $offset,unpack('b*', $seen_vecs[ $index ]), ;
    printf "              %s\n", (' ' x $offset ).'^'.$int;
}
dd({ints=>\@ints,uniq=>\@uniq,seen=>\@seen_vecs});
__END__