From 76a57e5d996ef75edcaa011991818b5d2665e506 Mon Sep 17 00:00:00 2001
From: Luis Mochan <mochan@fis.unam.mx>
Date: Mon, 15 Jan 2024 10:24:58 -0600
Subject: Solve PWC252

---
 challenge-252/wlmb/blog.txt     |  1 +
 challenge-252/wlmb/perl/ch-1.pl | 12 ++++++++++++
 challenge-252/wlmb/perl/ch-2.pl | 14 ++++++++++++++
 3 files changed, 27 insertions(+)
 create mode 100644 challenge-252/wlmb/blog.txt
 create mode 100755 challenge-252/wlmb/perl/ch-1.pl
 create mode 100755 challenge-252/wlmb/perl/ch-2.pl

diff --git a/challenge-252/wlmb/blog.txt b/challenge-252/wlmb/blog.txt
new file mode 100644
index 0000000000..2490bf4e93
--- /dev/null
+++ b/challenge-252/wlmb/blog.txt
@@ -0,0 +1 @@
+https://wlmb.github.io/2024/01/15/PWC252/
diff --git a/challenge-252/wlmb/perl/ch-1.pl b/challenge-252/wlmb/perl/ch-1.pl
new file mode 100755
index 0000000000..e42ac0e2ff
--- /dev/null
+++ b/challenge-252/wlmb/perl/ch-1.pl
@@ -0,0 +1,12 @@
+#!/usr/bin/env perl
+# Perl weekly challenge 252
+# Task 1:  Special Numbers
+#
+# See https://wlmb.github.io/2024/01/15/PWC252/#task-1-special-numbers
+use v5.36;
+use List::Util qw(sum0);
+die <<~"FIN" unless @ARGV;
+    Usage: $0 N1 [N2...]
+    to sum the squares of the special elements of N1 N2...
+    FIN
+say "@ARGV -> ", sum0 map {$ARGV[$_-1]**2} grep {@ARGV%$_==0} 1..@ARGV;
diff --git a/challenge-252/wlmb/perl/ch-2.pl b/challenge-252/wlmb/perl/ch-2.pl
new file mode 100755
index 0000000000..927509eb6c
--- /dev/null
+++ b/challenge-252/wlmb/perl/ch-2.pl
@@ -0,0 +1,14 @@
+#!/usr/bin/env perl
+# Perl weekly challenge 252
+# Task 2:  Unique Sum Zero
+#
+# See https://wlmb.github.io/2024/01/15/PWC252/#task-2-unique-sum-zero
+use v5.36;
+die <<~"FIN" unless @ARGV;
+    Usage: $0 N1 [N2...]
+    to obtain arrays of N_j numbers that add up to zero.
+    FIN
+for(@ARGV){
+    warn("Input must be greater than one"), next unless $_>=1;
+    say "$_ -> [", join(" ", -$_/2..-1, $_%2?(0):(), 1..$_/2), "]";
+}
-- 
cgit