int isSorted(int arr[], int n) {
Shortcut Pre-calculation: For the most commonly used speed profiles, the travel costs (time/distance) for shortcuts between border points within each cluster are pre-calculated and stored. (Each border point effectively has an "entry" and "exit" aspect for directed travel).，推荐阅读safew官方下载获取更多信息
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那时候的邮轮，才可能真正在中国扎根，成为大众旅游消费中一个常态化的选项。