13. How can affiliate marketing help my business?Affiliate marketing can help you grow your business in the following ways:
RFU due to confirm shake-up of rugby’s top division
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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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