时间复杂度O(3N)




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/* struct RandomListNode { int label;
struct RandomListNode *next, *random;
RandomListNode(int x) :
label(x), next(NULL), random(NULL) {
}
}; */ class Solution {
public :
RandomListNode* Clone(RandomListNode* pHead)
{
if (!pHead) return NULL;
RandomListNode *result,*cur,*tmp;
cur=pHead;
while (cur) //每个节点 后面复制一个自己
{
tmp= new RandomListNode(cur->label);
tmp->next=cur->next;
cur->next=tmp;
cur=tmp->next;
}
cur=pHead;
tmp=cur->next;
while (cur) //复制random连接
{
if (cur->random!=NULL)
tmp->random=cur->random->next;
cur=tmp->next;
if (cur!=NULL) //链表尾部的处理
tmp=cur->next;
}
//拆分两个表
cur=pHead;
result=cur->next;
tmp=result;
while (cur)
{
cur->next=tmp->next;
cur=cur->next;
if (cur!=NULL) //链表尾部的处理
{
tmp->next=cur->next;
tmp=tmp->next;
}
}
return result;
}
}; |