1 files changed, 58 insertions, 0 deletions
diff --git a/challenge-252/jo-37/perl/ch-1.pl b/challenge-252/jo-37/perl/ch-1.pl
new file mode 100755
index 0000000000..0b1cc1f5c2
--- /dev/null
+++ b/challenge-252/jo-37/perl/ch-1.pl
@@ -0,0 +1,58 @@
+#!/usr/bin/perl -s
+
+use v5.24;
+use Test2::V0 '!float';
+use PDL;
+use PDL::NiceSlice;
+use Math::Prime::Util 'divisors';
+
+our ($tests, $examples);
+
+run_tests() if $tests || $examples;	# does not return
+
+die <<EOS unless @ARGV;
+usage: $0 [-examples] [-tests] [I...]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+I...
+    list of integers
+
+EOS
+
+
+### Input and Output
+
+say snss(@ARGV);
+
+
+### Implementation
+
+sub snss {
+	sum pdl(@_)->(indx(divisors @_) - 1) ** 2
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        is snss(1, 2, 3, 4), 21, 'example 1';
+        is snss(2, 7, 1, 19, 18, 3), 63, 'example 2';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+
+        is snss(-1, -2), 5, 'negative values';
+	}
+
+    done_testing;
+    exit;
+}