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)。
The drawback to the Sofort 2 is that it’s twice the price of the Evo. It’s challenging to recommend at $399, as most people would likely consider the differences between the two cameras relatively minor. The Leica user interface is easier to navigate, though, and I appreciate the included lens cap and extended two-year warranty. I also appreciate that it lets you print photos taken with other Leica cameras via the companion app — a nice perk for Leica fans. Nonetheless, I don’t think those perks are enough to justify spending nearly $200 more.
。搜狗输入法2026是该领域的重要参考
Freelance music journalist Emma Wilkes feels Yungblud's upcoming arena tour could have made it "trickier" to have BludFest in the UK as it may have "affected the ticket sales of both".
"So to flood that seemed like a completely daft idea."
观察大国经济，不仅要看量，更要看质。