feat: solution for challenge 196

2 files changed, 70 insertions, 0 deletions

diff --git a/challenge-196/carlos-oliveira/perl/ch-1.pl b/challenge-196/carlos-oliveira/perl/ch-1.pl
new file mode 100644
index 0000000000..6d109d302b
--- /dev/null
+++ b/challenge-196/carlos-oliveira/perl/ch-1.pl
@@ -0,0 +1,37 @@
+use strict;
+use warnings;
+use Data::Dump;
+
+sub findThirdValue {
+  my ($arrayRef, $firstValueIndex, $secondValueIndex) = @_;
+  my @array = @$arrayRef;
+  for my $i ($secondValueIndex+1 .. $#array) {
+    return $array[$i] if $array[$i] < $array[$secondValueIndex]
+      && $array[$i] > $array[$firstValueIndex];
+  }
+  return undef
+}
+
+sub findSecondAndThirdValues {
+  my ($arrayRef, $firstValueIndex) = @_;
+  my @array = @$arrayRef;
+  for my $i ($firstValueIndex+1 .. $#array) {
+    next unless $array[$firstValueIndex] < $array[$i];
+    my $value3 = findThirdValue $arrayRef, $firstValueIndex, $i;
+    return ($array[$i], $value3) if defined $value3;
+  }
+  return ();
+}
+
+sub pattern132 {
+  for my $i (0 .. $#_) {
+    my @remainingValues = findSecondAndThirdValues \@_, $i;
+    return ($_[$i], @remainingValues) if @remainingValues > 0
+  }
+  return ();
+}
+
+dd pattern132(3, 1, 4, 2);
+dd pattern132(1, 2, 3, 4);
+dd pattern132(1, 3, 2, 4, 6, 5);
+dd pattern132(1, 3, 4, 2);
diff --git a/challenge-196/carlos-oliveira/perl/ch-2.pl b/challenge-196/carlos-oliveira/perl/ch-2.pl
new file mode 100644
index 0000000000..9354b6942e
--- /dev/null
+++ b/challenge-196/carlos-oliveira/perl/ch-2.pl
@@ -0,0 +1,33 @@
+use strict;
+use warnings;
+use Data::Dump;
+use List::MoreUtils qw(slideatatime);
+
+
+sub intervals {
+  my $isRegistering = 0;
+  my $begin;
+  my @intervals;
+  my $iterator = slideatatime 1, 2, @_;
+
+  # iterator fills with undef the free slots of the last window
+  while (my ($firstItem, $secondItem) = $iterator->()) {
+    unless (defined $secondItem && $firstItem + 1 == $secondItem) {
+      if ($isRegistering) {
+        push @intervals, [$begin, $firstItem];
+      }
+      $isRegistering = 0;
+      next;
+    }
+    unless ($isRegistering) {
+      $isRegistering = 1;
+      $begin = $firstItem;
+    }
+  }
+
+  return @intervals;
+}
+
+dd intervals(1,3,4,5,7);
+dd intervals(1,2,3,6,7,9);
+dd intervals(0,1,2,4,5,6,8,9);