43 lines
659 B
Perl
43 lines
659 B
Perl
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package part1;
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use 5.20.0;
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use warnings;
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use experimental qw/
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signatures
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postderef
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/;
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sub parse_line($line) {
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$line =~ s/(\w+ \w+) bags//;
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my $bag = $1;
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my %content = ();
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while ( $line =~ /(\d+) (\w+ \w+) bag/g ) {
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$content{$2} = $1;
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}
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return $bag => \%content;
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}
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sub contains( $name, $target, $bags ) {
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return 1 if $bags->{$name}{$target};
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for ( keys $bags->{$name}->%* ) {
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return 1 if contains( $_, $target, $bags );
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}
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return 0;
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}
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sub solution(@lines) {
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my %bags = map { parse_line($_) } @lines;
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return scalar grep { contains($_, 'shiny gold', \%bags) } keys %bags;
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}
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1;
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