/in/foo.cc: In function 'int main()':
/in/foo.cc:13:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |         for (int i = 0; i < s.length(); i++)
      |                         ~~^~~~~~~~~~~~
/in/foo.cc:35:18: error: expected '}' at end of input
   35 |         return 0;
      |                  ^
/in/foo.cc:6:1: note: to match this '{'
    6 | {
      | ^