Compilare: user.cpp: In function ‘long long int f(int, int)’: user.cpp:9:15: warning: unused variable ‘pas’ [-Wunused-variable] long long pas,z,rez; ^ user.cpp:9:19: warning: unused variable ‘z’ [-Wunused-variable] long long pas,z,rez; ^ user.cpp: In function ‘int main()’: user.cpp:21:19: warning: unused variable ‘j’ [-Wunused-variable] int n,i,pas,z,j; ^ user.cpp:23:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sume2.in","r",stdin); ^ user.cpp:24:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sume2.out","w",stdout); ^ user.cpp:25:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%lld",&n,&k); ^ user.cpp:27:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^