use strict;
use warnings;

my @array = (-11,-13,4, 22, 17);
print find_max_odd(@array), "\n";
sub find_max_odd {
    my $max; 
    while ($max = shift) {
        last if $max % 2;
    }
    return "Not found" unless @array;
    while (my $current = shift) {
        next unless $current % 2;
        if ($current > $max) {
            $max = $current;
        }
    }
    return $max;
}