$handle = fopen ("php://stdin","r");
fscanf($handle,"%d",$n);
$arr_temp = fgets($handle);
$arr = explode(" ",$arr_temp);
array_walk($arr,'intval');

$pos = 0; $neg = 0; $null = 0;
foreach($arr AS $key=>$value) {
    if ($value==0) {
        $null++;
    } elseif ($value>0) {
        $pos++;
    } else {
        $neg++;
    }
}
echo round($pos/$n,6)."\n";
echo round($neg/$n,6)."\n";
echo round($null/$n,6);