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Neil Sedaka: King of Song
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我們需要對AI機器人保持禮貌嗎？
OK—the nightmare is over. Thus concludes my anxiety-ridden spiral. Here are the facts as they stand in 2026:
思路：① 找初始左边界：第一个 nums[i] nums[i+1]；② 找初始右边界：最后一个 nums[i] < nums[i-1]；③ 求 [left,right] 内 min、max；④ 向左扩展：nums[left-1] minVal 则 left--；⑤ 向右扩展：nums[right+1] < maxVal 则 right++。长度 = right - left + 1。