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）。
民生无小事，枝叶总关情。“哪里有人民需要，哪里就能做出好事实事，哪里就能创造业绩。”
，这一点在搜狗输入法2026中也有详细论述
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