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035-复杂链表的复制.cpp
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035-复杂链表的复制.cpp
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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==nullptr)
return nullptr;
CloneNodes(pHead);
ConnectRandomNodes(pHead);
return ReconnectNodes(pHead);
}
void CloneNodes(RandomListNode* pHead){
RandomListNode* node=pHead;
while(node!=nullptr){
RandomListNode* cloneNode=new RandomListNode(0);
cloneNode->label=node->label;
cloneNode->next=node->next;
cloneNode->random=nullptr;
node->next=cloneNode;
node=cloneNode->next;
}
}
void ConnectRandomNodes(RandomListNode* pHead){
RandomListNode* node=pHead;
RandomListNode* cloneNode=node->next;
while(node!=nullptr){
if(node->random!=nullptr){
cloneNode->random=node->random->next;
}
node=cloneNode->next;
cloneNode=node->next;
}
}
RandomListNode* ReconnectNodes(RandomListNode* pHead){
RandomListNode* node=pHead;
RandomListNode* cloneHead=nullptr;
RandomListNode* cloneNode=nullptr;
cloneNode=cloneHead=node->next;
node->next=cloneNode->next;
node=cloneNode->next;
while(node!=nullptr){
cloneNode->next=node->next;
cloneNode=node->next;
node->next=cloneNode->next;
node=node->next;
}
return cloneHead;
}
};