Compilare: main.cpp: In function 'int rezolva(std::string&)': main.cpp:40:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int i = 0 ; i < exp.size() ; ++i ) { | ~~^~~~~~~~~~~~ main.cpp: In function 'int operatie(int, int, char)': main.cpp:35:1: warning: control reaches end of non-void function [-Wreturn-type] 35 | } | ^