Compilare: user.c: In function ‘S’: user.c:12:13: warning: operation on ‘*(A + (sizetype)((unsigned int)i * 4u))’ may be undefined [-Wsequence-point] A[i]+=(t=(A[i]-=((i<=B[0])?B[i]:0)+t)<0)*10; ^ user.c: In function ‘main’: user.c:16:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("nrcuv1.in","r",stdin),freopen("nrcuv1.out","w",stdout),scanf("%d",&n),a[0]=b[0]=a[1]=b[1]=1; ^ user.c:16:43: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("nrcuv1.in","r",stdin),freopen("nrcuv1.out","w",stdout),scanf("%d",&n),a[0]=b[0]=a[1]=b[1]=1; ^ user.c:16:74: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("nrcuv1.in","r",stdin),freopen("nrcuv1.out","w",stdout),scanf("%d",&n),a[0]=b[0]=a[1]=b[1]=1; ^