29 lines
456 B
Perl
29 lines
456 B
Perl
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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use List::UtilsBy qw/ partition_by /;
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use List::AllUtils qw/ pairmap sum product /;
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my @items =
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map {
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+{
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pairmap { scalar @$b => $a }
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partition_by { $_ }
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@$_
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}
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}
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map { [ split '' ] }
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<>;
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say product
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map { scalar @$_ }
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map {
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my $x = $_;
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[ grep { $_->{$x} } @items ]
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} 2, 3
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