Compilare: main.cpp: In function 'int main()': main.cpp:36:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i=alfa; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:66:35: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 66 | while(s.size()<ind) | ~~~~~~~~^~~~ main.cpp:19:9: warning: unused variable 'sum' [-Wunused-variable] 19 | int sum,n,rez,ind; | ^~~