Compilare: user.cpp: In function ‘long long unsigned int ciur(int)’: user.cpp:46:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (este_prim[i]&&nr_prime<=limita+1) ^ user.cpp:51:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr_prime==(limita+1)) ^ user.cpp:68:69: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (unsigned long long int j=0; j < (int)numere_prime.size() && i*numere_prime[j] < maxim && numere_prime[j] <= cel_mai_mic_factor_comun_prim[i]; ^ user.cpp:77:1: warning: control reaches end of non-void function [-Wreturn-type] } ^