When shoes slide across a floor, wave-like deformations of the sole can generate squeaking. The pitch of the squeak depends on the rate at which deformations are generated.
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* 时间复杂度: O(nlogn) 最坏: O(n²) 空间复杂度: O(logn) 稳定: ✗，这一点在旺商聊官方下载中也有详细论述
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