Compilare: main.cpp: In function 'void divide(bool, long long int)': main.cpp:36:23: 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] 36 | for (int i = 0; i < cur_num.size(); ++i) { | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int32_t main()': main.cpp:69:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | for (int i = 0; i < num.size(); ++i) { | ~~^~~~~~~~~~~~