Create ch-1.pl

1 files changed, 20 insertions, 0 deletions

diff --git a/challenge-192/james-smith/perl/ch-1.pl b/challenge-192/james-smith/perl/ch-1.pl
new file mode 100644
index 0000000000..bc94462d44
--- /dev/null
+++ b/challenge-192/james-smith/perl/ch-1.pl
@@ -0,0 +1,20 @@
+#!/usr/local/bin/perl
+
+use strict;
+
+use warnings;
+use feature qw(say);
+use Test::More;
+use Benchmark qw(cmpthese timethis);
+use Data::Dumper qw(Dumper);
+
+my @TESTS = (  [5,2],[4,3],[6,1] );
+
+is( binary_flip( $_->[0] ), $_->[1] ) for @TESTS;
+done_testing();
+
+sub binary_flip {
+  my($r,$k,$n) = (0,1,shift);
+  $r=(1-$n&1)*$k+$r,$k<<=1,$n>>=1 while $n;
+  $r;
+}