Compilare: user.cpp: In function ‘int main()’: user.cpp:62:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i < V.size(); ++i){ ^ user.cpp:69:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= S.size() - 1; ++i) ^