Merge pull request #9409 from wlmb/challenges

Solve PWC252

3 files changed, 27 insertions, 0 deletions

diff --git a/challenge-252/wlmb/blog.txt b/challenge-252/wlmb/blog.txt
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+++ 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
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+++ 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
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+++ b/challenge-252/wlmb/perl/ch-2.pl
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+#!/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), "]";
+}