/in/foo.cc: In function 'int main()':
/in/foo.cc:13:23: 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 <= input.length(); i++) {
      |                     ~~^~~~~~~~~~~~~~~~~
/in/foo.cc:14:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |         if (input[i] == ' ' || i == input.length()) {
      |                                ~~^~~~~~~~~~~~~~~~~