quickSortRecursive(arr, low, pivotIdx - 1); // 排序左半部分
习题链接：LeetCode 1475. 商品折扣后的最终价格
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Assembly Bill No. 1043 was approved by California governor Gavin Newsom in October of last year, and becomes active on January 1, 2027 (via The Lunduke Journal). The bill states, among other factors, that "An operating system provider shall do all of the following:"
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