From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Fri, 10 Dec 2021 05:26:15 +0000 (+0100)
Subject: Day 10: nice text-based substitutions
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=aoc2021.git;a=commitdiff_plain;h=fd980bac3eaa239f9477c07099abd96165c58336

Day 10: nice text-based substitutions
---

diff --git a/19.pl b/19.pl
new file mode 100755
index 0000000..419030b
--- /dev/null
+++ b/19.pl
@@ -0,0 +1,22 @@
+#!/usr/bin/perl -w
+
+use v5.16;
+
+my %score_of = (
+	')' => 3,
+	']' => 57,
+	'}' => 1197,
+	'>' => 25137,
+);
+
+my $sum;
+while (<>) {
+	chomp;
+	1 while s/\(\)|\[\]|\{\}|\<\>//;
+	s/^[\(\[\{\<]*//;
+	next if !length;
+	$sum += $score_of{substr($_, 0,1)};
+}
+
+say $sum;
+
diff --git a/20.pl b/20.pl
new file mode 100755
index 0000000..30f517f
--- /dev/null
+++ b/20.pl
@@ -0,0 +1,28 @@
+#!/usr/bin/perl -w
+
+use v5.16;
+
+my %score_of = (
+	'(' => 1,
+	'[' => 2,
+	'{' => 3,
+	'<' => 4,
+);
+
+my @sums;
+while (<>) {
+	chomp;
+	my $sum = 0;
+	1 while s/\(\)|\[\]|\{\}|\<\>//;
+        next if /[\)\]\}\>]/;
+	next if !length;
+	for my $c (reverse split //) {
+		$sum *= 5;
+		$sum += $score_of{$c};
+	}
+	push @sums, $sum;
+}
+
+@sums = sort { $a <=> $b } @sums;
+say $sums[@sums/2];
+