单选题 已知一个有向图的边(弧)集为{<a,c>,<b,c>,<b,d>,<c,e>,<d,e>},则以下不是该图拓扑序列的为
单选题 在双向链表中,在p所指的结点之后插入s指针所指的结点,其操作是
A、 p->next=s; s->prior=p; p->next->prior=s; s->next=p->next;
B、 s->prior-p; s->next=p->next; p->next=s; p->next->prior=s;
C、p->next=s; p->next->prior=s; s->prior=p; s->next=p->next;
D、 s->prior=p; s->next=p->next; s->next->prior=s; p->next=s;