Compilare: main.cpp: In function 'int main()': main.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i = 1; i < s.size(); ++i) { | ~~^~~~~~~~~~ main.cpp:25:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | while (i + manacher[i] + 1 < s.size() and i - manacher[i] - 1 >= 1 and s[i + manacher[i] + 1] == s[i - manacher[i] - 1]) { | ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~ main.cpp:34:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int i = 1; i < s.size(); ++i) { | ~~^~~~~~~~~~