31 lines
414 B
Perl
31 lines
414 B
Perl
use 5.20.0;
|
|
use warnings;
|
|
|
|
use List::AllUtils qw/ uniq /;
|
|
|
|
use experimental qw/
|
|
signatures
|
|
postderef
|
|
/;
|
|
|
|
my $code = <>;
|
|
chomp $code;
|
|
|
|
use DDP;
|
|
|
|
say length react($code);
|
|
|
|
|
|
sub react ($code) {
|
|
my @combos = map { create_dual($_) } uniq split '', $code;
|
|
my $re = join '|', @combos;
|
|
|
|
1 while $code =~ s/$re//g;
|
|
|
|
return $code;
|
|
}
|
|
|
|
sub create_dual($x) {
|
|
$x . ( $x eq uc $x ? lc $x : uc $x );
|
|
}
|