Dev - C++ - Ayuda con mi tarea

#include <iostream>

#include <vector>

using namespace std;

int main() {

    int n,i=1,s=1;

    vector <int> series;

    cout << "Ingrese valor de N: ";

    cin >> n;

    while (i <= n) {

        cout << s << ",";

        series.push_back(s);

        s += i;

        i += 1;

    }

    cout << endl;

    //mostrar vector

    cout << endl << "elementos en el vector\n";

    for (auto i : series)

        cout << i << ",";

    return 0;

}