Compilare: user.cpp: In function ‘void descomp(int)’: user.cpp:34:64: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (prime[f] * prime[f] <= X && X > 1 && f < prime.size()) { ^ user.cpp:33:9: warning: unused variable ‘cx’ [-Wunused-variable] int cx = X; ^ user.cpp: In function ‘int main()’: user.cpp:68:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < factori.size (); j++) { ^