insert vector to end of vector c++
vector<int> a; vector<int> b; a.insert(a.end(), b.begin(), b.end()); // or a.insert(std::end(a), std::begin(b), std::end(b));
Source: stackoverflow.com
vector insert to end
std::copy (b.begin(), b.end(), std::back_inserter(a));
Source: stackoverflow.com