Compilare: main.cpp: In function 'int main()': main.cpp:13:17: warning: unused variable 'nr' [-Wunused-variable] int nr=0; ^~ main.cpp:7:34: warning: unused variable 'd' [-Wunused-variable] long long int n,cn,a=1,b=1,i,d,nrval=0,lol=1; ^ main.cpp:7:36: warning: unused variable 'nrval' [-Wunused-variable] long long int n,cn,a=1,b=1,i,d,nrval=0,lol=1; ^~~~~ main.cpp:5:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("prodiv.in","r",stdin); ^ main.cpp:6:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("prodiv.out","w",stdout); ^ main.cpp:8:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^