'The finest in the world': Why the US is buying icebreakers from Finland
描述：设计 StockSpanner 类。每次调用 next(price) 时，返回当日价格的「跨度」：从今天往回数，价格 ≤ 今日价格的最大连续天数（含今天）。
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There is currently no screening programme for prostate cancer, the most common cancer in men.
Six planets will parade across the sky this weekend in a rare celestial spectacle, experts have said.