#include <string>
#include <iostream>
#include <vector>
#include <algorithm>
#include <sstream>
#include <iterator>
 
using namespace std;
 
string getLabeledPointsString(const vector<int> &x, const string &delimiter) {
    stringstream  s;
    copy(x.begin(),x.end(), ostream_iterator<int>(s,delimiter.c_str()));
    return s.str();
}
 
int main() {
	vector<int> v{1,2,3,4,5};
	auto res = getLabeledPointsString(v, ", ");
	cout << "res=" << res << "\n";
}

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