#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;
}