24 lines
489 B
Perl
24 lines
489 B
Perl
use 5.20.0;
|
|
|
|
my %directions = (
|
|
'v' => [ 0, 1 ],
|
|
'^' => [ 0, -1 ],
|
|
'<' => [ 1, 0 ],
|
|
'>' => [ -1, 0 ],
|
|
);
|
|
|
|
my @last = ([0,0],[0,0]);
|
|
my @positions = (
|
|
[0,0],
|
|
map {
|
|
my $last = shift @last;
|
|
my @this = ( $last->[0] + $_->[0], $last->[1] + $_->[1] );
|
|
push @last, \@this;
|
|
\@this;
|
|
}
|
|
map { $directions{$_} } split '', <> );
|
|
|
|
use List::AllUtils qw/ uniq /;
|
|
@positions = uniq map { join ':', @$_ } @positions;
|
|
say scalar @positions;
|