From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Fri, 18 Dec 2020 05:54:05 +0000 (+0100)
Subject: Day 18. Regexes!
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=aoc2020.git;a=commitdiff_plain;h=ad27dd52fd6e2e560706e17376bdf609e9bcc8a1

Day 18. Regexes!
---

diff --git a/35.pl b/35.pl
new file mode 100755
index 0000000..5582de3
--- /dev/null
+++ b/35.pl
@@ -0,0 +1,13 @@
+#!/usr/bin/perl -w
+
+use strict;
+
+my $sum = 0;
+while (<>) {
+	chomp;
+	1 while
+		s/\((\d+)\)/$1/ ||
+		s/(\d+)\s*([\+\*])\s*(\d+)/"$1$2$3"/ee;
+	$sum += $_;
+}
+print "sum=$sum\n";
diff --git a/36.pl b/36.pl
new file mode 100755
index 0000000..68eb4f9
--- /dev/null
+++ b/36.pl
@@ -0,0 +1,16 @@
+#!/usr/bin/perl -w
+
+use strict;
+
+my $sum = 0;
+while (<>) {
+	chomp;
+	1 while
+		s/\((\d+)\)/$1/ ||
+		s/(\([^\(\)]*?)(\d+)\s*\+\s*(\d+)([^\(\)]*\))/$1.($2+$3).$4/e ||
+		s/(\([^\(\)]*?)(\d+)\s*\*\s*(\d+)([^\(\)]*\))/$1.($2*$3).$4/e ||
+		s/(\d+)\s*([\+])\s*(\d+)/"$1$2$3"/ee ||
+		s/(\d+)\s*([\*])\s*(\d+)/"$1$2$3"/ee;
+	$sum += $_;
+}
+print "sum=$sum\n";