2 files changed, 19 insertions, 7 deletions
diff --git a/challenge-030/vyacheslav-volgarev/perl5/ch-1.pl b/challenge-030/vyacheslav-volgarev/perl5/ch-1.pl
index c677a4a685..f4b08d9167 100644
--- a/challenge-030/vyacheslav-volgarev/perl5/ch-1.pl
+++ b/challenge-030/vyacheslav-volgarev/perl5/ch-1.pl
@@ -1,14 +1,23 @@
+#!/usr/bin/env perl
+
 use strict;
 use warnings;
 use v5.10;
 
 use constant {
-	Sunday => 0,
-	Wednesday => 3
+	SUNDAY => 0,
+	WEDNESDAY => 3
 };
 
-my $day = Wednesday;
+my $day = WEDNESDAY;
+
+sub is_not_leap_year {
+	my $year = shift;
+	$year % 4 != 0 || ( $year % 100 == 0 && $year % 400 != 0 );
+}
 
 for ( 2020.. 2100 ) {
-	say "25 Dec $_ is Sunday" if ( $day += $_ % 4 != 0 || ($_ % 100 == 0 && $_ % 400 != 0) ? 1 : 2 ) % 7 == Sunday;
+	$day += is_not_leap_year( $_ ) ? 1 : 2;
+	$day %= 7;
+	say "25 Dec $_ is Sunday" if $day == SUNDAY;
 }
diff --git a/challenge-030/vyacheslav-volgarev/perl5/ch-2.pl b/challenge-030/vyacheslav-volgarev/perl5/ch-2.pl
index 978846d43a..5fc17c7efa 100644
--- a/challenge-030/vyacheslav-volgarev/perl5/ch-2.pl
+++ b/challenge-030/vyacheslav-volgarev/perl5/ch-2.pl
@@ -1,6 +1,9 @@
+#!/usr/bin/env perl
+
 use strict;
 use warnings;
 use v5.10;
+use List::Util qw( uniqstr );
 
 my @numbers;
 
@@ -8,9 +11,9 @@ for my $first ( 1..10 ) {
 
 	for my $second (1..10) {
 		my $third = 12 - $first - $second;
-		push @numbers, join ", ", sort ( $first, $second, $third ) if $third > 0;
+		push @numbers, join ", ", sort { $a <=> $b } ( $first, $second, $third ) if $third > 0;
 	}
 }
-my %uniq;
+
 $, = ";\n";
-say sort grep !$uniq{$_}++, @numbers;
+say uniqstr @numbers;