// Assign vector
    vector<int> v;
 
    // fill the vector with 10 five times
    v.assign(5, 10);
 
    cout << "The vector elements are: ";
    for (int i = 0; i < v.size(); i++)
        cout << v[i] << " ";
 
    // inserts 15 to the last position
    v.push_back(15);
    int n = v.size();
    cout << "\nThe last element is: " << v[n - 1];
 
    // removes last element
    v.pop_back();
 
    // prints the vector
    cout << "\nThe vector elements are: ";
    for (int i = 0; i < v.size(); i++)
        cout << v[i] << " ";
 
    // inserts 5 at the beginning
    v.insert(v.begin(), 5);
 
    cout << "\nThe first element is: " << v[0];
 
    // removes the first element
    v.erase(v.begin());
 
    cout << "\nThe first element is: " << v[0];
 
    // inserts at the beginning
    v.emplace(v.begin(), 5);
    cout << "\nThe first element is: " << v[0];
 
    // Inserts 20 at the end
    v.emplace_back(20);
    n = v.size();
    cout << "\nThe last element is: " << v[n - 1];
 
    // erases the vector
    v.clear();
    cout << "\nVector size after clear(): " << v.size();
 
    // two vector to perform swap
    vector<int> v1, v2;
    v1.push_back(1);
    v1.push_back(2);
    v2.push_back(3);
    v2.push_back(4);
 
    // Swaps v1 and v2
    v1.swap(v2);