#include <iostream>
#include <vector>

using namespace std;

int main () {

    vector<int> V;
    vector<int>::iterator i;
    vector<int>::const_iterator ci;
    vector<int>::reverse_iterator ri;
    vector<int>::size_type k;

    int j;

    for(j=0;j<10;j++) {
       V.push_back(j);
    }

    for(i=V.begin();i!=V.end();i++) {
       cout << *i << " " ;
    }
    cout << endl;

    for(ci=V.begin();ci!=V.end();ci++) {
       cout << *ci << " ";
    }
    cout << endl;

    for(ri=V.rbegin();ri!=V.rend();ri++) {
       cout << *ri  << " ";
    }
    cout << endl;

    cout << " Item 4 is " << V[4] << endl;
    V[4] = -4;
    cout << " Item 4 is " << V.at(4) << endl;

    i = V.begin();
    V.insert(i,-1);
    for(i=V.begin();i!=V.end();i++) {
       cout << *i << " " ;
    }
    cout << endl;

    i= V.begin();
    i++; i++;
    V.insert(i,99);
    for(k=0;k<V.size();k++) {
       cout << V[k] << " " ;
    }
    cout << endl;
}