Compilare: main.cpp: In function 'int consum(const std::string&)': main.cpp:57:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for(int i = 0; i < s.size(); ++i) | ~~^~~~~~~~~~