Compilare: user.cpp: In function ‘long long int f(long long int)’: user.cpp:31:29: warning: unused variable ‘last’ [-Wunused-variable] int nbr = fib[idx], last = 0; ^ user.cpp: In function ‘int main()’: user.cpp:56:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &q); ^ user.cpp:60:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld", &a, &b); ^