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$db_res = CCatalogProduct::GetList(array(),array(),false, false);while ($ar_res = $db_res->GetNext()){
   $arSelect = Array("ID", "IBLOCK_ID", "PROPERTY_LIKVIDNOST");
   $arFilter = Array("ID"=>$ar_res["ID"]);
   $res = CIBlockElement::GetList(Array(), $arFilter, false, false, $arSelect);
      while($ob = $res->GetNext()){
     $IBLOCK_ID = 26;
     $VALUES = array();
            $result = CIBlockElement::GetProperty($IBLOCK_ID, $ar_res["ID"], false, false, array("CODE" => "OFFERS"));
               while ($obj = $result->GetNext()){$VALUES[] = array('VALUE'=>$obj['VALUE']);}
         if ($ob["PROPERTY_LIKVIDNOST_VALUE"] == "Новинки") {
            $VALUES[] = array('VALUE' => 195075);
            CIBlockElement::SetPropertyValuesEx($ar_res["ID"], false, array(384 => $VALUES));
       } else {
            $c = 195075;
            foreach($VALUES as $k1=>$q) {foreach($q as $k2=>$r) {if($r == $c) {unset($VALUES[$k1][$k2]);}}}
            CIBlockElement::SetPropertyValuesEx($ar_res["ID"], false, array(384 => $VALUES));
      }
   }
}