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#!/usr/bin/env perl
use strict;
use warnings;
use experimental qw{ say postderef signatures state };
use List::Util qw{ min };
my @examples = (
[ 0, 1, 2 ],
[ 4, 3, 2, 1 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 ],
[ 7, 7, 7, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 ],
);
for my $example (@examples) {
my $input = join ', ', $example->@*;
my $output = smallest_index( $example->@* );
say <<~"END";
Input: \$ints = ($input)
Output: $output
END
}
sub smallest_index (@input) {
my @output;
for my $i ( 0 .. -1 + scalar @input ) {
my $j = $i % 10;
push @output, $i if $input[$i] == $j;
}
return min @output if scalar @output;
return -1;
}
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