Solve PWC 122

3 files changed, 42 insertions, 0 deletions

diff --git a/challenge-122/wlmb/blog.txt b/challenge-122/wlmb/blog.txt
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+++ b/challenge-122/wlmb/blog.txt
@@ -0,0 +1 @@
+https://wlmb.github.io/2021/07/19/PWC122/
diff --git a/challenge-122/wlmb/perl/ch-1.pl b/challenge-122/wlmb/perl/ch-1.pl
new file mode 100755
index 0000000000..7c00de90a1
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+++ b/challenge-122/wlmb/perl/ch-1.pl
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+#!/usr/bin/env perl
+# Perl weekly challenge 122
+# Task 1: Average of stream
+#
+# See https://wlmb.github.io/2021/07/19/PWC122/#task-1-average-of-stream
+use strict;
+use warnings;
+use v5.12;
+my $counter=0; # item counter
+my $total=0; # running total
+while(<>){
+    chomp;
+    ++$counter;
+    $total += $_;
+    my $average=$total/$counter;
+    say "Input: $_ Output: $average";
+}
diff --git a/challenge-122/wlmb/perl/ch-2.pl b/challenge-122/wlmb/perl/ch-2.pl
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+++ b/challenge-122/wlmb/perl/ch-2.pl
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+#!/usr/bin/env perl
+# Perl weekly challenge 122
+# Task 2:
+#  Basketball Points
+# See https://wlmb.github.io/2021/07/19/PWC122/#task-2-basketball-points
+use strict;
+use warnings;
+use v5.12;
+use Memoize;
+memoize("points");
+
+foreach (@ARGV){
+    say "Input: $_\nOutput:\n\t", join "\n\t", map {join " ", @$_} points($_);
+}
+sub points{
+    my $s=shift;
+    return ()  if $s<=0;
+    # Append a 1, 2 or 3 point throw to the previous points
+    my @result=((map {my @x=@$_;push @x,1; [@x]}points($s-1)),
+		(map {my @x=@$_;push @x,2; [@x]}points($s-2)),
+		(map {my @x=@$_;push @x,3; [@x]}points($s-3)));
+    push @result, [$s] if $s<=3;
+    return @result;
+}