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

int main()
{
cout << "F skupina, Denis Pinter" << endl;

queue<string> rad2;
if(rad2.empty())cout << " je prazdny ";
rad2.push("doc1");
rad2.push("doc2");
rad2.push("doc3");
rad2.push("doc4");


cout << rad2.front();
cout << rad2.back();

cout << " pocet prvkov " << rad2.size();

    return 0;
}