AoC 2023 day 2

2/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;
+
+open my $fh, '<', 'input.txt';
+
+my %cap = (
+	red   => 12,
+	green => 13,
+	blue  => 14
+);
+
+my $games = 0;
+
+for my $line (<$fh>) {
+	chomp $line;
+	$line =~ s/^Game (\d+): //;
+	my $id = $1;
+	my @hands = split /; /, $line;
+	my $possible = 1;
+	for my $hand (@hands) {
+		my @colors = split /, /, $hand;
+		my %cubes = ();
+		for my $color (@colors) {
+			my ($cubes, $col) = split / /, $color;
+			$cubes{$col} = $cubes;
+		}
+		for my $color (qw(red blue green)) {
+			next unless exists($cubes{$color});
+			if ($cubes{$color} > $cap{$color}) {
+				$possible = 0;
+				last;
+			}
+		}
+		last unless $possible;
+	}
+	$games += $id if ($possible == 1);
+}
+say $games;

2/b.pl

@@ -0,0 +1,64 @@
+#!/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;
+
+open my $fh, '<', 'input.txt';
+
+my %cap = (
+	red   => 12,
+	green => 13,
+	blue  => 14
+);
+
+my $games = 0;
+
+for my $line (<$fh>) {
+	chomp $line;
+	$line =~ s/^Game (\d+): //;
+	my $id = $1;
+	my @hands = split /; /, $line;
+	my $possible = 1;
+	my %minimums = (
+		red => 0, blue => 0, green => 0
+	);
+	for my $hand (@hands) {
+		my @colors = split /, /, $hand;
+		my %cubes = ();
+		for my $color (@colors) {
+			my ($cubes, $col) = split / /, $color;
+			$cubes{$col} = $cubes;
+		}
+		for my $color (qw(red blue green)) {
+			next unless exists($cubes{$color});
+			if ($cubes{$color} > $minimums{$color}) {
+				$minimums{$color} = $cubes{$color};
+			}
+		}
+		last unless $possible;
+	}
+	my $power = $minimums{red} * $minimums{green} * $minimums{blue};
+	$games += $power;
+}
+say $games;