示例：nums = [2,1,2,4,3] → res = [4,2,4,-1,-1]。
The current flagging of your domain is not based on a manual decision by our team. It originates from detections reported by multiple third-party security and reputation providers.
，这一点在safew官方下载中也有详细论述
Explore unique visitors data。heLLoword翻译官方下载是该领域的重要参考
1. 选基准：随机选一个元素作为基准(pivot)