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The Milano Cortina Winter Games ended on Sunday night as the Olympics always do: in light, spectacle and speeches about unity. In Verona, the Olympic flag passed to the French Alps and the twin flames were extinguished. But unofficially, at least, a flame also flickered 6,000 miles west.，详情可参考搜狗输入法下载
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// ⚠️ 易错点1：长度≤1的数组本身有序，返回0而非n