/in/foo.cc: In function 'int main()':
/in/foo.cc:12:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |                 for(int j=0;j<s[i].size();)
      |                             ~^~~~~~~~~~~~
/in/foo.cc:29:53: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |                                 if(!(s[i][j]=='.'||j>=s[i].size()))
      |                                                    ~^~~~~~~~~~~~~