Add polettix's solution to challenge-219

6 files changed, 49 insertions, 0 deletions

diff --git a/challenge-219/polettix/blog.txt b/challenge-219/polettix/blog.txt
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index 0000000000..d77c72a90d
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+++ b/challenge-219/polettix/blog.txt
@@ -0,0 +1 @@
+https://etoobusy.polettix.it/2023/06/01/pwc219-sorted-squares/
diff --git a/challenge-219/polettix/blog1.txt b/challenge-219/polettix/blog1.txt
new file mode 100644
index 0000000000..7d3ce05c35
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+++ b/challenge-219/polettix/blog1.txt
@@ -0,0 +1 @@
+https://etoobusy.polettix.it/2023/06/02/pwc219-travel-expenditure/
diff --git a/challenge-219/polettix/perl/ch-1.pl b/challenge-219/polettix/perl/ch-1.pl
new file mode 100644
index 0000000000..af5cf2e86a
--- /dev/null
+++ b/challenge-219/polettix/perl/ch-1.pl
@@ -0,0 +1,3 @@
+#!/usr/bin/env perl
+use v5.24;
+say join ', ', sort { $a <=> $b } map { $_ * $_ } @ARGV;
diff --git a/challenge-219/polettix/perl/ch-2.pl b/challenge-219/polettix/perl/ch-2.pl
new file mode 100644
index 0000000000..07dbe64c94
--- /dev/null
+++ b/challenge-219/polettix/perl/ch-2.pl
@@ -0,0 +1,24 @@
+#!/usr/bin/env perl
+use v5.24;
+use warnings;
+use experimental 'signatures';
+use Memoize;
+no warnings 'recursion';
+
+my @days = @ARGV;
+my @costs = splice @days, 0, 3;
+memoize('travel_expenditure');
+say travel_expenditure(\@costs, @days);
+
+sub travel_expenditure ($costs, @days) {
+   state $spans = [1, 7, 30];
+   return 0 unless @days;
+   my $min;
+   for my $i (0 .. 2) {
+      my ($first, @pool) = @days;
+      shift @pool while @pool && $pool[0] < $first + $spans->[$i];
+      my $cost = $costs->[$i] + travel_expenditure($costs, @pool);
+      $min = $cost if (! defined($min)) || ($cost < $min);
+   }
+   return $min;
+}
diff --git a/challenge-219/polettix/raku/ch-1.raku b/challenge-219/polettix/raku/ch-1.raku
new file mode 100644
index 0000000000..f65ae75996
--- /dev/null
+++ b/challenge-219/polettix/raku/ch-1.raku
@@ -0,0 +1,3 @@
+#!/usr/bin/env raku
+use v6;
+sub MAIN (*@args) { @args».².sort.join(', ').put }
diff --git a/challenge-219/polettix/raku/ch-2.raku b/challenge-219/polettix/raku/ch-2.raku
new file mode 100644
index 0000000000..20df5b243e
--- /dev/null
+++ b/challenge-219/polettix/raku/ch-2.raku
@@ -0,0 +1,17 @@
+#!/usr/bin/env raku
+use v6;
+sub MAIN (*@days is copy) {
+   put travel-expenditure(@days.splice(0, 3), @days);
+}
+
+sub travel-expenditure (@costs, @days) {
+   state @spans = 1, 7, 30;
+   state %cache;
+   return 0 unless @days;
+   my $key = @days.join(',');
+   %cache{$key} //= (@costs Z @spans).map(-> ($cost, $span) {
+      my ($first, @pool) = @days;
+      @pool.shift while @pool && @pool[0] < $first + $span;
+      $cost + samewith(@costs, @pool);
+   }).min;
+}