A.O(n) B.O(1) C.O(n2) D.O(n/2)
A. p->next=s;s->next=q B. q->next=s;s->next=p C. S->next=p->next;p->next=s D. p->next=s->next;s->next=q
A.O(n) B.O(n log2n) C.O(1) D.O(log2n)