#include <iostream>
#include <deque>
using namespace std;

int main()
{
    deque<float> coll;    // deque container for floating-point elements

    // insert elements from 1.1 to 6.6 each at the front
    for (int i=1; i<=6; ++i) {
        coll.push_front(i*1.1);      // insert at the front
	coll.push_back (i); //insert at the back
    }

    // print all elements followed by a space
    for (int i=0; i<coll.size(); ++i) {
        cout << coll[i] << ' ';
    }
    cout << endl;

    // remove first and last element
    coll.pop_front();
    coll.pop_back();

    //print the front and back
    cout << coll.front();
    cout << coll.back();
}