#include <iostream>
#include <set>
using namespace std;
int main() {
std::set<string> to_be_inserted;
std::set<string> res;
cout << "check everything is fine" << endl;
res.insert(to_be_inserted.begin(), to_be_inserted.end());
cout << "how about now ?" << endl;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8c2V0Pgp1c2luZyBuYW1lc3BhY2Ugc3RkOwogCiAKaW50IG1haW4oKSB7CglzdGQ6OnNldDxzdHJpbmc+IHRvX2JlX2luc2VydGVkOwoJc3RkOjpzZXQ8c3RyaW5nPiByZXM7Cgljb3V0IDw8ICJjaGVjayBldmVyeXRoaW5nIGlzIGZpbmUiIDw8IGVuZGw7CglyZXMuaW5zZXJ0KHRvX2JlX2luc2VydGVkLmJlZ2luKCksIHRvX2JlX2luc2VydGVkLmVuZCgpKTsKICAgIGNvdXQgPDwgImhvdyBhYm91dCBub3cgPyIgPDwgZW5kbDsKCXJldHVybiAwOwp9