Compilare: main.cpp: In function 'void divide(int, int, int, int)': main.cpp:30:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | else if (pos < s.size()) | ~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (int i = 0; i < s.size(); ++i) | ~~^~~~~~~~~~