/in/foo.cc: In function 'int longestPalindrome(const string&)':
/in/foo.cc:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for (int i = 0; i < s.length(); ++i) {
      |                     ~~^~~~~~~~~~~~
/in/foo.cc:23:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         for (int j = i + maxLength; j <= s.length(); ++j) {
      |                                     ~~^~~~~~~~~~~~~