#include <iostream>
#include <vector>
#include <string>
#include <sstream>
using namespace std;

int main() {
std::stringstream ss;
int a = 1;
std::string b = "str";
ss << a << b;
string res(ss.str());
vector<char> data(res.c_str(), res.c_str()+res.size()+1);
char *x = &data[0];
cout << x << endl;
return 0;
}