45 lines
864 B
Perl
45 lines
864 B
Perl
package part2;
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use 5.20.0;
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use warnings;
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use List::AllUtils qw/ zip pairmap sum reduce/;
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require './part1.pm';
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use experimental qw/ signatures postderef /;
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sub solution(@lines) {
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my @mask;
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my %mem;
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while( my $line = shift @lines ) {
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warn $line;
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if( $line =~ /mask = (.*)/ ) {
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@mask = split '', $1;
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next;
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}
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$line =~ /mem\[(\d+)\] = (\d+)/ or die;
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my $value = $2;
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my @num = split '', sprintf "%036b", $1;
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my $l = join '', pairmap { $a || $b } zip @mask, @num;
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my $num = $l =~ s/X/%d/g;
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for( 0..(2**$num)-1 ) {
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my $address = reduce {
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2*$a + $b
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} split '', sprintf $l, split '', sprintf "%0${num}b", $_;
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$mem{$address} = $value;
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}
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}
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no warnings;
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return sum values %mem;
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}
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1;
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