Solutions to challenge 80

2 files changed, 42 insertions, 0 deletions

diff --git a/challenge-080/dave-cross/perl/ch-1.pl b/challenge-080/dave-cross/perl/ch-1.pl
new file mode 100644
index 0000000000..59d1ee0490
--- /dev/null
+++ b/challenge-080/dave-cross/perl/ch-1.pl
@@ -0,0 +1,20 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use feature 'say';
+
+my @in = grep { /-?\d+/ } @ARGV;
+
+die "You must give me a list of integers\n" unless @in;
+
+my %ints = map { $_ => 1 } @in;
+
+my $i = 1;
+
+while (1) {
+  last if ! exists $ints{$i};
+  $i++;
+}
+
+say $i;
diff --git a/challenge-080/dave-cross/perl/ch-2.pl b/challenge-080/dave-cross/perl/ch-2.pl
new file mode 100644
index 0000000000..4d4f03f0bf
--- /dev/null
+++ b/challenge-080/dave-cross/perl/ch-2.pl
@@ -0,0 +1,22 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use feature 'say';
+
+my @in = grep { /\d+/ } @ARGV;
+
+die "You must give me a list of positive integers\n" unless @in;
+
+my $sweets = @in;
+
+for (0 .. $#in) {
+  if ($_ > 0 and $in[$_] > $in[$_ - 1]) {
+    $sweets++;
+  }
+  if ($_ < $#in and $in[$_] > $in[$_ + 1]) {
+    $sweets++;
+  }
+}
+
+say $sweets;