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).
栈（stack）是先进后出的数据结构。单调栈在入栈时通过一定规则保持栈内元素有序（单调递增或单调递减），从而把「找左侧/右侧第一个更大/更小元素」从 O(n²) 降到 O(n)。
經歷了接近半年時間的監禁，對關恆來說，這也加深了他對自由的感受。關恆說，過去在中國的時候，「我只是覺得被關到監獄、失去去自由其實是一個非常可怕的事情，但是具體有多可怕，我感受不到，我也不能完全想象到。」直到第一次真切地感受到失去人身自由之後，他才更意識到自由的重要性。，更多细节参见51吃瓜
The FTSE 100 index of blue-chip shares has extended its run of record, rising over the 10,900-point mark for the first time to reach 10,914 points.
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Compared to the S25, the new S26 base model features a marginally bigger screen with the same smooth scrolling, a generational bump to the Snapdragon 8 Elite Gen 5 chip, a similar camera setup (a 50MP main, 12MP ultra-wide, 10MP telephoto, and 12MP selfie camera), a meaningful battery improvement, and of course, new AI features. If you're rocking an old handset and want to upgrade without excessively splurging, preordering the Samsung Galaxy S26 at Amazon is the move. You'll even get a free $100 gift card to spend on whatever else you need (a new case perhaps).