Compilare: main.cpp: In function 'std::vector<int> manacher_odd(const std::string&)': main.cpp:17:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for (int i = 0; i < str.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:19:45: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | while (i-ret[i]>=0&&i+ret[i]<str.size()&&str[i-ret[i]]==str[i+ret[i]]) { | ~~~~~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:47:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for (int i = 0; i < lps.size(); i++) { | ~~^~~~~~~~~~~~