From 71c43e79d03679056e97d698f3e452729dcf0759 Mon Sep 17 00:00:00 2001
From: Flavio Poletti <flavio@polettix.it>
Date: Tue, 15 Dec 2020 23:14:50 +0100
Subject: Add polettix's solution to PWC091

---
 challenge-091/polettix/blog.txt     |  1 +
 challenge-091/polettix/blog1.txt    |  1 +
 challenge-091/polettix/perl/ch-1.pl | 34 ++++++++++++++++++++++++++++++++++
 challenge-091/polettix/perl/ch-2.pl | 14 ++++++++++++++
 4 files changed, 50 insertions(+)
 create mode 100644 challenge-091/polettix/blog.txt
 create mode 100644 challenge-091/polettix/blog1.txt
 create mode 100644 challenge-091/polettix/perl/ch-1.pl
 create mode 100644 challenge-091/polettix/perl/ch-2.pl

diff --git a/challenge-091/polettix/blog.txt b/challenge-091/polettix/blog.txt
new file mode 100644
index 0000000000..8a0c74e5c9
--- /dev/null
+++ b/challenge-091/polettix/blog.txt
@@ -0,0 +1 @@
+https://github.polettix.it/ETOOBUSY/2020/12/15/pwc091-count-number/
diff --git a/challenge-091/polettix/blog1.txt b/challenge-091/polettix/blog1.txt
new file mode 100644
index 0000000000..7de637fc35
--- /dev/null
+++ b/challenge-091/polettix/blog1.txt
@@ -0,0 +1 @@
+https://github.polettix.it/ETOOBUSY/2020/12/16/jump-game/
diff --git a/challenge-091/polettix/perl/ch-1.pl b/challenge-091/polettix/perl/ch-1.pl
new file mode 100644
index 0000000000..30abdd0ef2
--- /dev/null
+++ b/challenge-091/polettix/perl/ch-1.pl
@@ -0,0 +1,34 @@
+#!/usr/bin/env perl
+use 5.024;
+use warnings;
+use experimental qw< postderef signatures >;
+no warnings qw< experimental::postderef experimental::signatures >;
+
+sub count_number ($N) {
+   my $retval = '';
+   while (length $N) {
+      my ($sequence, $char) = $N =~ m{((.)\2*)}mxs;
+      my $n = length $sequence;
+      $retval .= $n . $char;
+      substr $N, 0, $n, '';
+   }
+   return $retval;
+}
+
+sub count_number_2 ($N) {
+   my $len = length $N;
+   my ($retval, $previous, $count) = ('', '', 0);
+   for my $i (0 .. $len) {
+      my $c = $i < $len ? substr($N, $i, 1) : '';
+      if ($c eq $previous) { ++$count }
+      else {
+         $retval .= $count . $previous if $count;
+         ($previous, $count) = ($c, 1);
+      }
+   }
+   return $retval;
+}
+
+my $input = shift // '1122234';
+say count_number($input);
+say count_number_2($input);
diff --git a/challenge-091/polettix/perl/ch-2.pl b/challenge-091/polettix/perl/ch-2.pl
new file mode 100644
index 0000000000..c3759fd93f
--- /dev/null
+++ b/challenge-091/polettix/perl/ch-2.pl
@@ -0,0 +1,14 @@
+#!/usr/bin/env perl
+use 5.024;
+use warnings;
+use experimental qw< postderef signatures >;
+no warnings qw< experimental::postderef experimental::signatures >;
+
+sub jump_game ($N) {
+   my $position = 0;
+   $position += $N->[$position] while $position < $#$N && $N->[$position];
+   return $position == $#$N ? 1 : 0;
+}
+
+my @sequence = @ARGV ? @ARGV : (1, 2, 1, 2);
+say jump_game(\@sequence);
-- 
cgit