From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Sat, 10 Dec 2022 05:44:19 +0000 (+0100)
Subject: Day 10: off-by-ones
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=aoc.git;a=commitdiff_plain;h=8178bf23f8ff274ff80686f4cea19f849c853f08

Day 10: off-by-ones
---

diff --git a/2022/19.pl b/2022/19.pl
new file mode 100755
index 0000000..bb8db33
--- /dev/null
+++ b/2022/19.pl
@@ -0,0 +1,29 @@
+#!/usr/bin/perl -w
+
+use v5.36;
+use strict;
+use experimental 'multidimensional';
+
+my $tsc = 1;
+my $x = 1;
+my $prev_gen = 0;
+my $sum = 0;
+while (<>) {
+	my ($op, $num) = /^(\w+)(?: (-?\d+))?/;
+	# say "$tsc $x  $op $num";
+	$tsc++;
+	my $gen = int(($tsc+20)/40);
+	if ($gen != $prev_gen) {
+		$prev_gen = $gen;
+		my $str = $x * ((40*$gen)-20);
+		$sum += $str;
+		# say "$tsc x $x = ", $str;
+	}
+	if ($op eq 'addx') {
+		$x += $num;
+		$tsc++;
+	}
+}
+
+say $sum;
+
diff --git a/2022/20.pl b/2022/20.pl
new file mode 100755
index 0000000..9c2a59d
--- /dev/null
+++ b/2022/20.pl
@@ -0,0 +1,28 @@
+#!/usr/bin/perl -w
+
+use v5.36;
+use strict;
+use experimental 'multidimensional';
+
+my $tsc = 1;
+my $prev_tsc = 1;
+my $x = 1;
+my $prev_gen = 0;
+while (<>) {
+	my ($op, $num) = /^(\w+)(?: (-?\d+))?/;
+
+	$tsc++;
+	while ($prev_tsc <= $tsc) {
+		# say "$prev_tsc ok" if $x +2 <= $prev_tsc;
+		my $off = $prev_tsc % 40;
+		print(($x <= $off && $x + 2 >= $off) ? '#' : '.');
+		print "\n" if $prev_tsc % 40 == 0;
+		$prev_tsc++;
+	}
+	if ($op eq 'addx') {
+		$x += $num;
+		$tsc++;
+	}
+}
+print "\n";
+