Compilare: main.cpp: In function 'std::vector<std::pair<int, int> > lee(int, int, int, int)': main.cpp:67:1: warning: no return statement in function returning non-void [-Wreturn-type] 67 | } | ^ main.cpp: In function 'int main()': main.cpp:76:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for(int j = 0; j < s.length(); j++){ | ~~^~~~~~~~~~~~