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）。
Сайт Роскомнадзора атаковали18:00
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Израиль нанес удар по Ирану09:28，更多细节参见搜狗输入法2026
In an internal memo cutting the Pentagon’s long list of priority technologies down to six, he wrote that the previous list “did not provide the focus that the threat environment of today requires,” and declared that “in alignment with President Trump’s Artificial Intelligence (AI) Action Plan, the Department of War must become an ‘AI‑First’ organization.”