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#!/usr/bin/env perl
use strict;
use warnings;
use experimental qw{ fc say postderef signatures state };
use List::Util qw{ first };
my @examples = (
[ 2, 5, 3, 4 ],
[ 9, 4, 1, 3, 6, 4, 6, 1 ],
[ 1, 2, 2, 3 ],
);
for my $example (@examples) {
my @output = number_game( $example->@* );
my $output = join ', ', @output;
my $ints = join ', ', $example->@*;
say <<"END";
Input: \@ints = ($ints)
Output: ($output)
END
}
sub number_game (@ints) {
my @sorted = sort { $a <=> $b } @ints;
my @output;
while (@sorted) {
my @cache;
push @cache, shift @sorted;
push @cache, shift @sorted;
@cache = reverse @cache;
push @output, @cache;
}
return @output;
}
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