Challenge 115-2 solution by brtastic

1 files changed, 34 insertions, 0 deletions

diff --git a/challenge-115/brtastic/perl/ch-2.pl b/challenge-115/brtastic/perl/ch-2.pl
new file mode 100644
index 0000000000..28a2ce48bf
--- /dev/null
+++ b/challenge-115/brtastic/perl/ch-2.pl
@@ -0,0 +1,34 @@
+use v5.34;
+use warnings;
+
+use List::Util qw(first);
+
+sub largest_multiple
+{
+	my @digits = @_;
+
+	my @sorted_asc = sort { $a <=> $b } @digits;
+	my $smallest_index = first { $sorted_asc[$_] % 2 == 0 } keys @sorted_asc;
+
+	die 'no result divisible by 2 can be achieved'
+		unless defined $smallest_index;
+
+	my $smallest = splice @sorted_asc, $smallest_index, 1;
+	return join '', reverse(@sorted_asc), $smallest;
+
+}
+
+use Test::More;
+
+is largest_multiple(1, 0, 2, 6), 6210;
+is largest_multiple(1, 4, 2, 8), 8412;
+is largest_multiple(4, 1, 7, 6), 7614;
+is largest_multiple(1, 2, 3, 4, 5, 6, 7, 8, 9, 0), 9876543210;
+
+# this will throw
+eval {
+	largest_multiple(1, 1, 1, 1, 3);
+	fail;
+};
+
+done_testing;