front_inserter example

 int  main()  {
         list<int>  l;
         copy(istream_iterator<int>(cin),
                  istream_iterator<int>(),
                  front_inserter(l));
         copy(l.begin(),  l.end(),
                ostream_iterator<int>(cout,  ",  "));
         cout  <<  endl;
 }
Input:    2 63 42 1 8
Output: 8, 1, 42, 63, 2