头部稳健增长、腰部强势扩张，总量却不增反降——这一矛盾现象背后，是行业洗牌加速、存量博弈深化的真实写照。数字背后，酒店集团们必须读懂这场结构性分化传递的深层信号，以及隐藏在数量之下的海量市场信息。
3014249210http://paper.people.com.cn/rmrb/pc/content/202602/27/content_30142492.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/27/content_30142492.html11921 为人民出政绩 以实干出政绩
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People who believe they contribute to society are more likely to vote and engage in politics. They were also more likely to donate to and volunteer for political causes compared to individuals who saw their contribution to society as smaller.
* 时间复杂度：O(n)，空间复杂度：O(n)