An inversion list would store a list of three Numbers: 0, 3, 5.
倒排表将存储一个由三个数字构成的序列：0,3,5。
If we are building an inversion list for searching only, we do not need to store the position of the last bit.
如果我们要构建一个只用于查找的倒排表，我们就不需要存储最后一比特的位置。
The necessary companion to the invlist function is data_from_invlist , which generates the original data back from the inversion list.
与invlist函数相对应的函数是data _ from _ invlist，用来从倒排表中生成原始数据。
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