Compilare: user.cpp: In function ‘int main()’: user.cpp:38:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < V.size(); ++i ) ^ user.cpp:24:9: warning: variable ‘sum’ set but not used [-Wunused-but-set-variable] int sum; ^ user.cpp: In function ‘long long int SumDiv(int)’: user.cpp:52:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int it = 0; it < Prime.size(); ++it ) ^