From e1d559a51ba7c0de8b6cc21bdc545da9185a023b Mon Sep 17 00:00:00 2001
From: Lubos Kolouch <lubos@kolouch.net>
Date: Sat, 27 Nov 2021 21:31:10 +0100
Subject: Challenge 140 Task 1 LK Perl

---
 challenge-140/lubos-kolouch/perl/ch-1.pl | 69 ++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 challenge-140/lubos-kolouch/perl/ch-1.pl

diff --git a/challenge-140/lubos-kolouch/perl/ch-1.pl b/challenge-140/lubos-kolouch/perl/ch-1.pl
new file mode 100644
index 0000000000..d1a28879be
--- /dev/null
+++ b/challenge-140/lubos-kolouch/perl/ch-1.pl
@@ -0,0 +1,69 @@
+use strict;
+use warnings;
+
+sub parse_input {
+    my $what = shift;
+
+    my @nums = ($what) =~ /=\s+(\d+).*?(\d+)/;
+
+    return @nums;
+}
+
+sub get_bin_sum {
+    my $what = shift;
+
+    my ( $num1, $num2 ) = parse_input($what);
+
+    return 0 unless $num1 * $num2;
+    my $result   = '';
+    my $overflow = 0;
+
+    my $smaller = $num1;
+    my $larger  = $num2;
+
+    if ( length($num1) > length($num2) ) {
+        $smaller = $num2;
+        $larger  = $num1;
+    }
+
+    for my $num ( 1 .. length($larger) ) {
+        my $add1 = substr( $larger, length($larger) - $num, 1 );
+
+        my $add2 = 0;
+        $add2 = substr( $smaller, length($smaller) - $num, 1 ) if $num <= length($smaller);
+
+        my $sum = $add1 + $add2 + $overflow;
+
+        if ( $sum < 2 ) {
+            $overflow = 0;
+            $result   = $sum . $result;
+        }
+        elsif ( $sum == 2 ) {
+            $overflow = 1;
+            $result   = "0" . $result;
+        }
+        else {
+            $overflow = 1;
+            $result   = "1" . $result;
+
+        }
+
+    }
+    $result = "1" . $result if substr( $result, 0, 1 ) == "0";
+
+    return $result;
+}
+
+use Test::More;
+
+my ( $test_num1, $test_num2 ) = parse_input('$a = 11; $b = 1;');
+
+is( $test_num1, 11 );
+is( $test_num2, 1 );
+
+is( get_bin_sum('$a = 1; $b = 1;'),  10 );
+is( get_bin_sum('$a = 11; $b = 1;'), 100 );
+is( get_bin_sum('$a = 10; $b = 1;'), 11 );
+is( get_bin_sum('$a = 0; $b = 0;'),  0 );
+
+done_testing;
-- 
cgit