44 lines
800 B
Perl
44 lines
800 B
Perl
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use 5.20.0;
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my $stream = <>;
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chomp $stream;
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$stream = clean_stream($stream);
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use Text::Balanced qw/ extract_bracketed /;
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use List::AllUtils qw/ sum /;
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use experimental qw/signatures /;
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say score( $stream );
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sub score($stream,$level=1) {
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$stream =~ s/.*?\{(.*)\}.*?/$1/;
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my @children;
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my $extracted;
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while( length $stream ) {
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( $extracted, $stream ) = extract_bracketed( $stream, '{}', qr/,?/ );
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push @children, $extracted if length $extracted;
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$stream =~ s/^,|,$//;
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}
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return sum $level, map { score($_,$level+1) } @children;
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}
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sub clean_stream {
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my $s = shift;
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return $s unless $s =~ s/^(.*?)<//;
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my $clean = $1;
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while( $s =~ s/^.*?(!!|!>|>)// ) {
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last if $1 eq '>';
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}
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return $clean . clean_stream($s);
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}
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