Challenge #119

2 files changed, 60 insertions, 0 deletions

diff --git a/challenge-119/dave-cross/perl/ch-1.pl b/challenge-119/dave-cross/perl/ch-1.pl
new file mode 100644
index 0000000000..ea2c14b0c1
--- /dev/null
+++ b/challenge-119/dave-cross/perl/ch-1.pl
@@ -0,0 +1,17 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use feature 'say';
+
+say oct '0b' . join '', reverse get_number() =~ /(\d{4})(\d{4})/;
+
+sub get_number {
+  my $err = "Give me an integer less than 256\n";
+
+  die $err unless @ARGV;
+  die $err if $ARGV[0] =~ /\D/;
+  die $err if $ARGV[0] >= 256;
+
+  return sprintf '%08b', $ARGV[0];
+}
diff --git a/challenge-119/dave-cross/perl/ch-2.pl b/challenge-119/dave-cross/perl/ch-2.pl
new file mode 100644
index 0000000000..b794681d99
--- /dev/null
+++ b/challenge-119/dave-cross/perl/ch-2.pl
@@ -0,0 +1,43 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use feature 'say';
+
+my $n = get_number();
+
+my @seq;
+
+while (@seq < $n) {
+  get_next(\@seq);
+}
+
+say $seq[-1];
+
+sub get_next {
+  my ($seq) = @_;
+
+  unless (@$seq) {
+    @$seq = 1;
+    return;
+  }
+
+  my $next = $seq->[-1] + 1;
+
+  until ($next =~ /^[123]+$/ and $next !~ /11/) {
+    ++$next;
+  }
+  
+  push @$seq, $next;
+
+  return;
+}
+
+sub get_number {
+  my $err = "Give me an integer\n";
+
+  die $err unless @ARGV;
+  die $err if $ARGV[0] =~ /\D/;
+
+  return $ARGV[0];
+}