Vector simple use

#include<iostream>
#include<vector>

using namespace std;

int main ( ) {
    int N;
    cout << "N: ";
    cin >> N;

    vector<int> V(N);

    cout << "V size: " << V.size() << endl;

    for(int i = 0; i < V.size(); i++) {
        cout << V[i] << " ";
    }

    return 0;
}