Solution to task 1

1 files changed, 20 insertions, 0 deletions

diff --git a/challenge-089/jo-37/perl/ch-1.pl b/challenge-089/jo-37/perl/ch-1.pl
new file mode 100755
index 0000000000..93510bb801
--- /dev/null
+++ b/challenge-089/jo-37/perl/ch-1.pl
@@ -0,0 +1,20 @@
+#!/usr/bin/perl
+
+use Test2::V0;
+use Math::Utils 'gcd';
+use List::Util 'reduce';
+
+sub gcd_sum {
+	my $n = shift;
+	reduce {
+		local *_ = \$b;
+		$a + reduce {$a + gcd($_, $_ + $b)} 0 .. $n - $b;
+	} 0 .. $n - 1;
+}
+
+is gcd_sum(3), 3, 'Example 1';
+is gcd_sum(4), 7, 'Example 2';
+is gcd_sum(5), 11;
+is gcd_sum(6), 20;
+
+done_testing;