#include <iostream>
#include <ginac/ginac.h>
using namespace std;
using namespace GiNaC;

int main()
{
    parser reader;
	lst expr_in;
	expr_in = ex_to<lst>(reader("{x,x}"));
    symtab table = reader.get_syms();
    symbol x=ex_to<symbol>(table["x"]);
    cout << "The derivative of list1 " << expr_in.diff(x)<<endl;
}