i want to receive a vector that will have 3 two dimensional vectors for example Code: int main() { vector<vector<vector<int>>> ab=function()[0]; } vector<vector<vector<int>>> function() { vector<vector<vector<int>>> return_vector; vector<vector<int>> first; vector<vector<int>> second; vector<vector<int>> third; //give values to three vectors and then isert them to return_vector return_vector.push_back(first); return_vector_push_back(second); return_vector.push_back(third); return return_vector; } i know that this is not the appropriate form but how can be that done??