Date: 2017aug24 Language: C++ Keywords: push_back, push_front, append Q. How do I prepend to a std::vector<> ? A. Its slow but this is how you do it:

std::vector<int> a; a.push_back(200); // Append at the end a.insert(a.begin(), 100); // Insert at the beginning

If you need to do this a lot use a different container like std::list or std::deque. They have push_front();