Element at index in a std::set?

Question

I\'ve stumbled upon this problem: I can\'t seem to select the item at the index\' position in a normal std::set. Is this a bug in STD?

Below a simple ex

Answer 1

There is no way you can access it in constant time.

But you can reach to any element in O(n) time. E.g.

std::set::iterator it;
it=my_set.begin();
advance(it,n);
cout<<*it;