#include <iostream>
#include <numeric>
#include <vector>
#include <string>

int main()
{
	std::vector<std::string> v {"alpha", "beta", "gamma"};
	std::string s = std::accumulate(std::begin(v), std::end(v), std::string{});
	std::cout << "s = \"" << s << '"' << std::endl;
}