AoC 2023 day 6

6/a.pl

@@ -0,0 +1,61 @@
+#!/usr/bin/env perl
+# Copyright 2023 Síle Ekaterin Liszka
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+use strict;
+use warnings;
+use feature qw(:5.36);
+use autodie;
+
+use List::Util qw(reduce);
+
+open my $fh, '<', 'input.txt';
+
+my $data = '';
+{
+	local $/;
+	$data = <$fh>;
+	chomp $data;
+}
+my ($times, $distances) = split /\n/, $data, 2;
+
+my @times = split / +/, $times;
+shift @times;
+my @distances = split / +/, $distances;
+shift @distances;
+
+sub calc_combos($time, $target) {
+	my $ret = 0;
+	for my $i (1 .. ($time - 1)) {
+		my $travel = ($time - $i) * $i;
+		$ret++ if ($travel > $target);
+	}
+	return $ret;
+}
+
+my @combos;
+for my $race (0 .. $#times) {
+	my $time = $times[$race];
+	my $target = $distances[$race];
+	push @combos, calc_combos($time, $target);
+}
+
+say join(' ', @combos);
+say reduce { $a * $b } @combos;

6/b.pl

@@ -0,0 +1,50 @@
+#!/usr/bin/env perl
+# Copyright 2023 Síle Ekaterin Liszka
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+use strict;
+use warnings;
+use feature qw(:5.36);
+use autodie;
+
+use List::Util qw(reduce);
+
+open my $fh, '<', 'input.txt';
+
+my $data = '';
+{
+	local $/;
+	$data = <$fh>;
+	chomp $data;
+}
+my ($time, $distance) = split /\n/, $data, 2;
+$time =~ s/[^0-9]+//g;
+$distance =~ s/[^0-9]+//g;
+
+sub calc_combos($time, $target) {
+	my $ret = 0;
+	for my $i (1 .. ($time - 1)) {
+		my $travel = ($time - $i) * $i;
+		$ret++ if ($travel > $target);
+	}
+	return $ret;
+}
+
+say calc_combos($time, $distance);