/in/foo.cc: In function 'int main()':
/in/foo.cc:16:66: error: 'rbegin' was not declared in this scope
   16 |             if (l == string(l.rbegin(), l.rend()) && r == string(rbegin(r), rend(r))) {
      |                                                                  ^~~~~~
/in/foo.cc:16:77: error: 'rend' was not declared in this scope; did you mean 'rand'?
   16 |             if (l == string(l.rbegin(), l.rend()) && r == string(rbegin(r), rend(r))) {
      |                                                                             ^~~~
      |                                                                             rand