foo.cc: In function 'int main()':
foo.cc:13:18: 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<inp.length();i++){
      |                 ~^~~~~~~~~~~~~
foo.cc:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(int i=0;i<ans.size();i++){
      |                 ~^~~~~~~~~~~

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