/in/foo.cc: In function 'void solve()':
/in/foo.cc:9:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for(int i=0;i<s.size();i++){
      |                 ~^~~~~~~~~
/in/foo.cc:23:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |             if(i==s.size()-1) b+=(sum*fh*d);
      |                ~^~~~~~~~~~~~