Compilare: main.cpp: In function 'int main()': main.cpp:48:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for ( j = 0; j < cuv.size(); j++ ) | ~~^~~~~~~~~~~~ main.cpp:58:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for ( t = 0; t < cuv.size(); t++ ) | ~~^~~~~~~~~~~~