南方周末：这些演出安排是出于肖赛冠军头衔的义务吗？
The BBC has apologised and called what happened "a serious mistake", saying Davie has instructed the Executive Complaints Unit (ECU) to "complete a fast-tracked investigation and provide a full response to complainants".
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f(x)={x,x0αx,x≤0(α≈0.01)
* 核心思路：找初始无序边界 + 计算区间最值 + 扩展边界