p->next->prev=s; p->next=s; s->prev=p; s->next=p->next;
s->next =p->next;s->prev=p; p->next=s;p->next->prev=s;
s->prev=p; s->next=p->next; p->next=s; p->next->prev=s;
s->prev=p; s->next=p->next; p->next->prev=s; p->next=s;
这道题你会答吗?花几分钟告诉大家答案吧!
扫描二维码,关注牛客网
下载牛客APP,随时随地刷题