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）。
Donald Campbell, advocacy director at Foxglove, a group of campaigning lawyers, said Miliband's letter to the committee "raises more questions than it answers".
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This means there is a golden moment: the exact instant between “HotAudio’s player finishes decrypting a chunk” and “that chunk is handed to the browser’s media engine.” If you can intercept appendBuffer at that instant, you receive every chunk in its pristine, fully decrypted state, on a silver fucking platter.