Compilare: user.cpp: In function ‘int main()’: user.cpp:26:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=a;j<=b;j++) ^ user.cpp:34:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=a;j<=b;j++) ^ user.cpp:19:36: warning: unused variable ‘prod’ [-Wunused-variable] unsigned long long a,b,q,t,A,i,prod,cnt=0,cprod; ^ user.cpp:19:47: warning: unused variable ‘cprod’ [-Wunused-variable] unsigned long long a,b,q,t,A,i,prod,cnt=0,cprod; ^