Solve PWC256

3 files changed, 34 insertions, 0 deletions

diff --git a/challenge-256/wlmb/blog.txt b/challenge-256/wlmb/blog.txt
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+https://wlmb.github.io/2024/02/12/PWC256/
diff --git a/challenge-256/wlmb/perl/ch-1.pl b/challenge-256/wlmb/perl/ch-1.pl
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+++ b/challenge-256/wlmb/perl/ch-1.pl
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+#!/usr/bin/env perl
+# Perl weekly challenge 256
+# Task 1:  Maximum Pairs
+#
+# See https://wlmb.github.io/2024/02/12/PWC256/#task-1-maximum-pairs
+use v5.36;
+use List::Util qw(sum0);
+die <<~"FIN" unless @ARGV;
+    Usage: $0 S1 [S2...]
+    to pair Si with the reverse SJ and count the resulting pairs
+    assuming at most one pair per string.
+    FIN
+my %count;
+my $reverse;
+for (@ARGV){
+    ++$count{$_};
+    my $reverse=reverse $_;
+    --$count{$reverse} unless $reverse eq $_;
+}
+say "@ARGV -> ", (sum0 map {!$_} values %count)/2;
diff --git a/challenge-256/wlmb/perl/ch-2.pl b/challenge-256/wlmb/perl/ch-2.pl
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+++ b/challenge-256/wlmb/perl/ch-2.pl
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+#!/usr/bin/env perl
+# Perl weekly challenge 256
+# Task 2:  Merge Strings
+#
+# See https://wlmb.github.io/2024/02/12/PWC256/#task-2-merge-strings
+use v5.36;
+sub next_char($x){
+    shift @$x||""
+}
+my ($x,$y)=map{[split ""]}@ARGV;
+my $out="";
+$out.=next_char($x) . next_char($y) while(@$x||@$y);
+say "@ARGV -> $out"