Compilare: main.cpp: In function 'bool palinn(std::string)': main.cpp:7:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 7 | for(int i = 0; i < s.size()/2; i++) | ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:34:19: 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 < palin.size(); i++) | ~~^~~~~~~~~~~~~~