#include <vector> // vector 

#include <sstream> // string stream 

#include <iterator> // ostream_iterator 

#include <iostream> // cout 

using namespace std;

​

int main()

{

    vector<int> nums = {10, 7, 76, 415};

    stringstream result;

    copy(nums.begin(), nums.end(), std::ostream_iterator<int>(result, ""));

    string n = result.str();

    cout << n;

}

​

​