foo.cc: In function 'void splitfix(std::string&, std::string&)':
foo.cc:8:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |         for ( int i = 0 ; i < s.size() ; i++ )
      |                           ~~^~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:27:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         for(int i=0;i<z.size();i++)
      |                     ~^~~~~~~~~
foo.cc:51:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         for(int i=0;i<ans.size();i++)
      |                     ~^~~~~~~~~~~

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