Compilare: main.cpp: In function 'long long int solve(char)': main.cpp:48:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for (int i=0;i<elem.size ();++i){ | ~^~~~~~~~~~~~~ main.cpp:62:18: warning: variable 'posok' set but not used [-Wunused-but-set-variable] 62 | int ok=0,posok=0,smax=-6000000; | ^~~~~ main.cpp: In function 'int main()': main.cpp:78:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for (int i=0;i<s.size ();++i){ | ~^~~~~~~~~~ main.cpp: In function 'long long int solve(char)': main.cpp:15:18: warning: control reaches end of non-void function [-Wreturn-type] 15 | vector <int> elem; | ^~~~