palindromic.cpp: In function 'void solve()':
palindromic.cpp:12:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
12 | while (i <= s.size() / 2) {
| ~~^~~~~~~~~~~~~~~
palindromic.cpp:15:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
15 | for (; i + len <= s.size() / 2; ++len) {
| ~~~~~~~~^~~~~~~~~~~~~~~