include <iostream>
  include <string>
  include <locale>
  
  using namespace std;
  
  int main(int argc, char** argv)
  {
      locale loc("");
  
      if (loc.name().find("en_US") == string::npos &&
                  loc.name().find("United States") == string::npos) {
          wcout << L"Welcome non-U.S. user!" << endl;
      } else {
          wcout << L"Welcome U.S. user!" << endl;
      }
  }