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。搜狗输入法2026是该领域的重要参考
This is a complicated technical and social problem, with no single solution. We also have competing priorities for what is the most important problem with WebAssembly to fix first.
思路：单调递减栈，找「上一个比当前价格大的元素索引」。正序遍历，弹出所有 ≤ 当前价格的索引；跨度 = 当前索引 - 栈顶索引（栈空则为 当前索引 + 1）。