Compilare: user.c: In function ‘main’: user.c:4:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("split.in","r",stdin),freopen("split.out","w",stdout),scanf("%d%d",&n,&a[1]),x[1]=b[1]=a[1]; ^ user.c:4:42: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("split.in","r",stdin),freopen("split.out","w",stdout),scanf("%d%d",&n,&a[1]),x[1]=b[1]=a[1]; ^ user.c:4:72: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("split.in","r",stdin),freopen("split.out","w",stdout),scanf("%d%d",&n,&a[1]),x[1]=b[1]=a[1]; ^ user.c:6:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",a+i),x[i]=a[i]>x[i-1]?x[i-1]:a[i],b[i]=a[i]>b[i-1]?a[i]:b[i-1]; ^