Compilare: main.cpp: In function 'int rasp(std::string)': main.cpp:8:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 8 | for(i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp:11:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for(i=1;i<=s.size()/2;i++) | ~^~~~~~~~~~~~ main.cpp:27:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(j=i;j<s.size()-i;j++) | ~^~~~~~~~~~~