Compilare: user.cpp: In function ‘int main()’: user.cpp:51:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int d=0; d<=L[primm].size() && L[primm].size()!=0; d++) ~^~~~~~~~~~~~~~~~~ user.cpp:50:35: warning: unused variable ‘ok’ [-Wunused-variable] int x = v[primm]; int ok = 0; ^~ user.cpp:31:27: warning: unused variable ‘ok’ [-Wunused-variable] int x = v[i]; int ok = 0; ^~