Compilare: user.cpp: In function ‘int main()’: user.cpp:140:24: warning: statement has no effect [-Wunused-value] sol==(1<<nr_zero)*(nr_max_imp_neg+nr_max_par_neg+nr_min_impar_poz); ^ user.cpp:101:27: warning: unused variable ‘x2’ [-Wunused-variable] long long x2,y2,z2,sol; ^ user.cpp:101:30: warning: unused variable ‘y2’ [-Wunused-variable] long long x2,y2,z2,sol; ^ user.cpp:101:33: warning: unused variable ‘z2’ [-Wunused-variable] long long x2,y2,z2,sol; ^ user.cpp:142:30: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol--; ^