From c487a2ff6fe9dcc1c3e5057576dda05d96859907 Mon Sep 17 00:00:00 2001
From: Mark <53903062+andemark@users.noreply.github.com>
Date: Sun, 10 Oct 2021 17:04:34 +0000
Subject: reference added

---
 challenge-133/mark-anderson/raku/ch-1.raku | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/challenge-133/mark-anderson/raku/ch-1.raku b/challenge-133/mark-anderson/raku/ch-1.raku
index 0050ec81ed..f187b346df 100644
--- a/challenge-133/mark-anderson/raku/ch-1.raku
+++ b/challenge-133/mark-anderson/raku/ch-1.raku
@@ -8,6 +8,8 @@ is isqrt(27),   5;
 is isqrt(85),   9;
 is isqrt(101), 10;
 
+# from https://stackoverflow.com/a/15391420
+
 sub isqrt($n)
 {
     my $x = $n;
-- 
cgit