3 files changed, 38 insertions, 9 deletions
diff --git a/challenge-006/maxim-kolodyazhny/perl5/ch-1.pl b/challenge-006/maxim-kolodyazhny/perl5/ch-1.pl
index 0a87aa1371..c34849037f 100755
--- a/challenge-006/maxim-kolodyazhny/perl5/ch-1.pl
+++ b/challenge-006/maxim-kolodyazhny/perl5/ch-1.pl
@@ -6,13 +6,14 @@ use 5.028.1;
 use List::Util qw(sum);
 
 s{
-    ( \b  \d+   )
-    ( ,?  \d+ , )+
-    ( \d+ \b    )
+    ( \b \d+   )
+    ( ,? \d+ , )+
+    (    \d++  )
     (??{
         # this block is treated as a pattern
-        # != will return '' (always match) or 1 (fail because of previous \b)
-        ( $3 - $1 + 1 ) * ( $1 + $3 ) / 2 != sum split ',', $&;
+        # != will return '' (match) or 1 (fail, because \d++ will swallow all)
+        # sum( eval $& ) will work too (;
+        ( $3 - $1 + 1 ) * ( $1 + $3 ) / 2 != ( sum( split ',', $& ) || -1 );
     })
 }
 {$1-$3}xg;
diff --git a/challenge-006/maxim-kolodyazhny/perl5/ch-1.t b/challenge-006/maxim-kolodyazhny/perl5/ch-1.t
new file mode 100644
index 0000000000..6f75f83286
--- /dev/null
+++ b/challenge-006/maxim-kolodyazhny/perl5/ch-1.t
@@ -0,0 +1,32 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+
+use v5.028.1;
+
+use Test::More tests => 11;
+
+my %tests = (
+    '0,0,0'        => '0,0,0',
+    '0,9999999999' => '0,9999999999',
+    '1'            => 1,
+    '1,1,1,2,3,4'  => '1,1,1-4',
+    '1,2'          => '1,2',
+    '1,2,3,4'      => '1-4',
+    '10,2,3,4'     => '10,2-4',
+    '100,101,102'  => '100-102',
+    '3,2,1,0'      => '3,2,1,0',
+    '4,3,2'        => '4,3,2',
+    '100,1,2,3'    => '100,1-3',
+);
+
+while ( my ( $i, $o ) = each %tests ) {
+
+    my $r = `echo $i | perl ./ch-1.pl`;
+    chomp $r;
+
+    is( $r, $o );
+}
+
+done_testing 11;
diff --git a/challenge-006/maxim-kolodyazhny/perl5/ch-2.pl b/challenge-006/maxim-kolodyazhny/perl5/ch-2.pl
index ff3bc8aa53..668d797feb 100755
--- a/challenge-006/maxim-kolodyazhny/perl5/ch-2.pl
+++ b/challenge-006/maxim-kolodyazhny/perl5/ch-2.pl
@@ -1,10 +1,6 @@
 #!/usr/bin/env perl
 
-use strict;
-use warnings;
-
 use v5.028.1;
-
 use bigrat qw(bexp PI);
 
 say bexp( PI * sqrt(163), 80 );