Year 2018

[aoc.git] / 2018 / 12.pl

diff --git a/2018/12.pl b/2018/12.pl
new file mode 100755 (executable)
index 0000000..dac4857
--- /dev/null
+++ b/2018/12.pl
@@ -0,0 +1,27 @@
+#!/usr/bin/perl -w
+
+use v5.30;
+use strict;
+
+my @pts = map { [ /(\d+)/g ] } <>;
+
+my ($minx, $miny, $maxx, $maxy);
+for my $pt (@pts) {
+       $minx = $pt->[0] if !defined $minx || $minx > $pt->[0];
+       $maxx = $pt->[0] if !defined $maxx || $maxx < $pt->[0];
+       $miny = $pt->[1] if !defined $miny || $miny > $pt->[1];
+       $maxy = $pt->[1] if !defined $maxy || $maxy < $pt->[1];
+}
+
+my $count;
+for my $x ($minx .. $maxx) {
+for my $y ($miny .. $maxy) {
+       my $dist;
+       for my $i (0 .. $#pts) {
+               my $pt = $pts[$i];
+               $dist += abs($x-$pt->[0]) + abs($y-$pt->[1]);
+       }
+       $count++ if $dist < 10000;
+} }
+
+say $count;