/in/foo.cc: In function 'int main()':
/in/foo.cc:13:25: warning: use of an operand of type 'bool' in 'operator++' is deprecated [-Wdeprecated]
   13 |                         ok++;
      |                         ^~
/in/foo.cc:14:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |                 for (int i=0;i<=s.size()-1;i++)
      |                              ~^~~~~~~~~~~~
/in/foo.cc:17:33: warning: use of an operand of type 'bool' in 'operator++' is deprecated [-Wdeprecated]
   17 |                                 sz++;
      |                                 ^~
/in/foo.cc:19:33: warning: use of an operand of type 'bool' in 'operator++' is deprecated [-Wdeprecated]
   19 |                                 zm++;
      |                                 ^~