#include <iostream>
using namespace std ;

template<typename T>
T adder(T v)
{

}

template<typename T, typename... Args>
T adder(T first, Args... args)
{


}

int main()
{
	//long sum = adder(1, 2, 3, 8, 7);
	long sum = adder( 1, 2, 3 );
    cout << "sum: " <<   sum << endl ;
	std::string s1 = "x", s2 = "aa", s3 = "bb", s4 = "yy";
    std::string ssum = adder(s1, s2, s3, s4);

}