use strict;
use warnings;

my $match = '1995_Olga_goes_to_Egypt';
my @pictures = qw{1995/1995_Olga_first_time_in_Cyprus/06330004.JPG
1995/1995_Olga_goes_to_Egypt/QD0017004.JPG};
foreach my $picture (sort @pictures) {
    print "Debug: $picture\n";
    if ($picture =~ m/$match/)
    {
      print "Matched, $picture\n";
      last;
    }
}
print "Result: $picture\n";