促消费，贵在精准。就拿文旅消费券来说，问题不在发多少，而在怎么发。今天，旅游需求日益个性化、差异化，倘若仅以“发完”为目的，就很难有针对性地挖掘消费潜力，也会造成资源浪费。创新发放消费券机制，让消费券更精准锁定潜在需求群体，才能发挥其应有作用，同时精准滴灌真正需要扶持的文旅项目。
Twig's is interwoven into the culture of Shawano, a close-knit city of little more than 9,000 people. Sun Drop Dayz – a community fundraiser with live music and activities – has been held on the first weekend of June since 2017.
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* 时间复杂度：O(n)，空间复杂度：O(n)