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)。
This booster bundle contains six booster packs from Pokémon TCG: Scarlet & Violet Journey Together. It's a straightforward offering that gives collectors the chance to pull valuable chase cards like Lillie’s Clefairy ex, Salamance ex, N’s Zoroark ex, and Iono’s Bellibolt ex. The chances are slim, but you could get lucky.
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The MacBook is coming back — or at least, that's what the rumors claim. Next week, Apple is expected to announce a colorful, low-cost, non-Air, non-Pro MacBook powered by one of its mobile processors. By avoiding its pricier M-series chips, Apple may reportedly be able to reach a low $699 or $799 price for the MacBook. The $999 MacBook Air is the cheapest laptop on the company's website right now, but Apple also sold the older M1 MacBook Air at Walmart for $700 in 2024, which later went down to $650 last year.
Фото: Bilal Hussein / AP