输入：head = [2,1,5]
As the top boss of their companies, CEOs often rely on layers of management to do their employee bidding—but Match Group leader Spencer Rascoff has broken down the barriers of command. The CEO said the best-kept secret in creating a great company is to encourage transparency, so he asked all his employees to start DMing him.
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（七）提供应用程序分发服务的，应当采取监测发现、防范、阻断、处置专门用于侵入、非法控制计算机信息系统的程序、工具，未经许可、备案或者非法处理个人信息等违法违规应用程序的措施；
一份美国总务管理局（GSA）1月15日的报告摘要指出，Grok-4“不符合联邦政府通用及联邦实验性AI平台所要求的安全与对齐预期”。