Compilare: main.c: In function 'S': main.c:14:13: warning: operation on '*(A + (sizetype)((long unsigned int)i * 4ul))' may be undefined [-Wsequence-point] A[i]+=(t=(A[i]-=((i<=B[0])?B[i]:0)+t)<0)*10; ^~ main.c: In function 'main': main.c:19:5: 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; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:19:36: 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; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:19:69: 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; ^~~~~~~~~~~~~~