Compilare: main.cpp: In function 'long long int calc(long long int)': main.cpp:24:18: 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] 24 | for(i=1;i<s.size();i++) | ~^~~~~~~~~ main.cpp:15:22: warning: variable 'stg' set but not used [-Wunused-but-set-variable] 15 | int rasp=0,i,cif,stg=0; | ^~~