const stack = []; // 存更大温度的索引栈（核心优化：仅存索引，替代对象）
Flipping the robovac over, there's another Shark classic underneath: The singular flat mopping pad... again. Shark is the only big robot vacuum brand that hasn't branched out to dual spinning mop pads (elite corner mopping) or a roller mop (elite spill soaking) in at least one model. But there are a few special features baked in to separate this Shark from the basic vacuum mop combos.
，更多细节参见电影
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8 ring buffers aligned to 64B