Compilare: user.c: In function ‘main’: user.c:5:2: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%lld",(n==1?0:(n%3==0?(((n/3)%p)*((((n-1)%p)*((n+1)%p))%p))%p:((n-1)%3==0?((n%p)*(((((n-1)/3)%p)*((n+1)%p))%p))%p:((n%p)*(((((n+1)/3)%p)*((n-1)%p))%p))%p)))); ^ user.c:4:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma.in","r",stdin),freopen("suma.out","w",stdout),scanf("%d%d",&n,&p), ^ user.c:4:38: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma.in","r",stdin),freopen("suma.out","w",stdout),scanf("%d%d",&n,&p), ^ user.c:4:67: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma.in","r",stdin),freopen("suma.out","w",stdout),scanf("%d%d",&n,&p), ^