Compilare: user.cpp: In function ‘int main()’: user.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vec_a.size(); i++) ^ user.cpp:23:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vec_c.size(); i++) assert(g << vec_c[i] << " "); ^