23 lines
410 B
Perl
23 lines
410 B
Perl
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package Day1::Part1;
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use 5.36.0;
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use List::Util qw/ sum pairmap /;
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use List::MoreUtils qw/ part zip /;
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sub read_file(@lines) {
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my $i = 0;
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my @lists = part { $i++ % 2} map { split } @lines;
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return @lists;
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}
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sub solve(@lists) {
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for my $x (1,0) {
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$lists[$x] = [ sort { $a <=> $b } $lists[$x]->@* ];
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}
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return sum pairmap { abs $a - $b } zip $lists[0]->@*, $lists[1]->@*;
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}
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1;
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