$totalnodes = 0
$upnodes = 0
$nodes = (Get-ClusterNode -ErrorAction SilentlyContinue)

if($nodes -eq $null) {
  return -1
} else {
  $totalnodes = $nodes.Count
  foreach ($node in $nodes) {
    if ($node.State -eq "Up") {
      $upnodes++
    }
  }
  return $totalnodes - $upnodes
}