/in/foo.cc: In function 'bool a(std::string)':
/in/foo.cc:13:22: 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.size();i++)
      |                     ~^~~~~~~~~
/in/foo.cc: In function 'bool b(std::string)':
/in/foo.cc:20:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |         for(int i=0;i<s.size();i++)
      |                     ~^~~~~~~~~
/in/foo.cc:20:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   20 |         for(int i=0;i<s.size();i++)
      |         ^~~
/in/foo.cc:22:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   22 |                 return ok;
      |                 ^~~~~~