#include <vector>
#include <list>
#include <functional>
#include <algorithm>
#include <iostream>

int main()
{
    const std::list<int> lst { 5, 4, 9, 3, 1, 8, 0 } ;
    for( const int& i : lst ) std::cout << i << " (" << &i << ") "  ;
    std::cout << '\n' ;

    std::vector< std::reference_wrapper< const int > > vec( lst.begin(), lst.end() ) ;
    std::sort( vec.begin(), vec.end() ) ;
    for( const int& i : vec ) std::cout << i << " (" << &i << ") "  ;
    std::cout << '\n' ;
}