#! /usr/bin/perl

use strict;
use warnings;

  my $base_dir = 'C:\Input';

my @to_visit = $base_dir;

while (@to_visit) {
   my $dir = pop(@to_visit);

   opendir(my $dh, $dir);

   my $file;
   while(defined($file = readdir($dh))) {
      next if $file eq '.';
      next if $file eq '..';

      $file = "$dir/$file";

      if (-d $file) {
         push(@to_visit, $file);
		 print $file;
		 print "\n";
      } else {
 
      }
   }
}