/in/foo.cc: In function 'int main()':
/in/foo.cc:16:9: warning: unused variable 'place' [-Wunused-variable]
  int n, place;
         ^
/in/foo.cc: In function 'ans trans(std::__cxx11::string)':
/in/foo.cc:45:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < strdeci.size(); i++)
                    ^
/in/foo.cc:52:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 2; i <= deci; i++)
                    ^