From d28714c2d511fc9c218ac86fa1e7a8dd790f6a5a Mon Sep 17 00:00:00 2001
From: "Markus \"Holli\" Holzer" <holli.holzer@gmail.com>
Date: Tue, 25 Feb 2020 18:45:53 +0100
Subject: added impossibility check

---
 challenge-049/markus-holzer/raku/ch-1.p6 | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/challenge-049/markus-holzer/raku/ch-1.p6 b/challenge-049/markus-holzer/raku/ch-1.p6
index 5793330e98..44a9b0861b 100644
--- a/challenge-049/markus-holzer/raku/ch-1.p6
+++ b/challenge-049/markus-holzer/raku/ch-1.p6
@@ -1,4 +1,8 @@
 sub MAIN( $n )
 {
+    # I have no formal proof for this, but I have a strong hunch that it's true.
+    say "Impossible" and exit 
+        if so ( 2, 4, 8 ... *² > $n ).first( $n %% * );
+
     say (1, 10, { $_ %% 2 ?? $_ + 1 !! $_ * 10 } ... *).first( * %% $n );
-}
\ No newline at end of file
+}
-- 
cgit