Merge pull request #8007 from wlmb/challenges

Solve PWC215

3 files changed, 34 insertions, 0 deletions

diff --git a/challenge-215/wlmb/blog.txt b/challenge-215/wlmb/blog.txt
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@@ -0,0 +1,2 @@
+https://wlmb.github.io/2023/05/01/PWC215/
+
diff --git a/challenge-215/wlmb/perl/ch-1.pl b/challenge-215/wlmb/perl/ch-1.pl
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+++ b/challenge-215/wlmb/perl/ch-1.pl
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+#!/usr/bin/env perl
+# Perl weekly challenge 215
+# Task 1:  Odd one Out
+#
+# See https://wlmb.github.io/2023/05/01/PWC215/#task-1-odd-one-out
+use v5.36;
+die <<~"FIN" unless @ARGV;
+    Usage: $0 W1 [W2...]
+    to count words whose letters are not sorted
+    FIN
+say "@ARGV -> ", 0+grep {(join "", sort {$a cmp $b} split "") ne $_} @ARGV;
diff --git a/challenge-215/wlmb/perl/ch-2.pl b/challenge-215/wlmb/perl/ch-2.pl
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+++ b/challenge-215/wlmb/perl/ch-2.pl
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+#!/usr/bin/env perl
+# Perl weekly challenge 215
+# Task 2:  Number Placement
+#
+# See https://wlmb.github.io/2023/05/01/PWC215/#task-2-number-placement
+use v5.36;
+die <<~"FIN" unless @ARGV==2;
+    Usage: $0 N S
+    to find if I can replace N 1's in the string S consisting of 0's and 1's
+    Only 0's that don't have a 1 to their left nor right may be replaced.
+    FIN
+my $count=shift;
+my $copy=my $orig=shift;
+for($copy){ # localize
+    die "Only 0's and 1's allowed. Invalid input: $_" unless /^[01]*$/;
+    s/^/0/; # add leading and trailing 0's
+    s/$/0/;
+    my $replacements=0;
+    $replacements++ while s/000/010/; # count replacements
+    say "Count: $count, string: $orig -> ", $replacements>=$count? 1:0;
+}