Hello.
I need a little help about set data structure. Is it possible that access the i-th element of a set with O(1) ?
Hello.
I need a little help about set data structure. Is it possible that access the i-th element of a set with O(1) ?
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First of all, you cannot access an element of a std::set with less complexity than O(log(n)). And also you cannot access the i-th element of a set. But you can do this with a little trick.
Thank you. But I know before that it is possible to accsess the i-th element with O(n) .So is there no work to acsess the i-th element with O(log n)?
unfortunately no. I don't know why they didn't make this feature although it was easy to be done