gistfile1.txt

function solution(array $numbers): int {
  $count = count($numbers);
  $numbers = array_unique($numbers);
  
  while (count(array_unique($numbers)) > 1) {
    
    $min = min($numbers);
    
    foreach ($numbers as &$number) {
      if ($number > $min) {
        $result = $number % $min;
        
        $number = ($result === 0) ? $min : $result;
      }
    }
  }
  
  $number = array_shift($numbers);
  
  var_dump($count);
  return $number;
  //return $number * $count;
}