Compilare: main.cpp: In function 'int main()': main.cpp:60:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(int i=0;i<s.size();i++) | ~^~~~~~~~~ main.cpp: In function 'P getP(char)': main.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type] 24 | } | ^