From 727f52061759d083a4ecba02a95e0db4fcc5dbbc Mon Sep 17 00:00:00 2001
From: Luis Mochan <mochan@fis.unam.mx>
Date: Mon, 6 May 2024 09:27:00 -0600
Subject: Solve PWC268

---
 challenge-268/wlmb/blog.txt     |  1 +
 challenge-268/wlmb/perl/ch-1.pl | 16 ++++++++++++++++
 challenge-268/wlmb/perl/ch-2.pl | 17 +++++++++++++++++
 3 files changed, 34 insertions(+)
 create mode 100644 challenge-268/wlmb/blog.txt
 create mode 100755 challenge-268/wlmb/perl/ch-1.pl
 create mode 100755 challenge-268/wlmb/perl/ch-2.pl

diff --git a/challenge-268/wlmb/blog.txt b/challenge-268/wlmb/blog.txt
new file mode 100644
index 0000000000..3ea74b1f37
--- /dev/null
+++ b/challenge-268/wlmb/blog.txt
@@ -0,0 +1 @@
+https://wlmb.github.io/2024/05/06/PWC268/
diff --git a/challenge-268/wlmb/perl/ch-1.pl b/challenge-268/wlmb/perl/ch-1.pl
new file mode 100755
index 0000000000..62f723eb20
--- /dev/null
+++ b/challenge-268/wlmb/perl/ch-1.pl
@@ -0,0 +1,16 @@
+#!/usr/bin/env perl
+# Perl weekly challenge 268
+# Task 1:  Magic Number
+#
+# See https://wlmb.github.io/2024/05/06/PWC268/#task-1-magic-number
+use v5.36;
+use PDL;
+die <<~"FIN" unless @ARGV==2;
+    Usage: $0 X Y
+    where X is "[x1 x2...]" and Y=[y1 y2...]
+    to find the magic number M which added to the elements
+    of X yields the elements of Y
+    FIN
+my ($x,$y)=map{pdl $_}@ARGV;
+my (undef, $values)=($y->qsort-$x->qsort)->rle;
+say "@ARGV -> ", $values->dim(0)==1?$values:"None"
diff --git a/challenge-268/wlmb/perl/ch-2.pl b/challenge-268/wlmb/perl/ch-2.pl
new file mode 100755
index 0000000000..7f0fac4262
--- /dev/null
+++ b/challenge-268/wlmb/perl/ch-2.pl
@@ -0,0 +1,17 @@
+#!/usr/bin/env perl
+# Perl weekly challenge 268
+# Task 2:  Number Game
+#
+# See https://wlmb.github.io/2024/05/06/PWC268/#task-2-number-game
+use v5.36;
+use experimental qw(for_list);
+die <<~"FIN" unless @ARGV and @ARGV%2==0;
+    Usage: $0 N1 N2... N2m
+    to print array even sized array N1..N2m in zig-zag order
+    (decreasing pairs of increasing value)
+    FIN
+my @result;
+for my($x, $y)(sort {$a<=>$b} @ARGV){
+    push @result, sort{$b<=>$a}($x,$y)
+}
+say "@ARGV -> @result";
-- 
cgit