题目描述 输入一个复杂链表(每个节点中有节点值,以及两个指针,一个指向下一个节点,另一个特殊指针指向任意一个节点),返回结果为复制后复杂链表的head。(注意,输出结果中请不要返回参数中的节点引用,否则判题程序会直接返回空)
/* 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* pNode = pHead; RandomListNode* copyNode; while (pNode) { copyNode = new RandomListNode(pNode->label); copyNode->next = pNode->next; pNode->next = copyNode; pNode = copyNode->next; } pNode = pHead; while (pNode) { copyNode = pNode->next; if(pNode->random) copyNode->random = pNode->random->next; pNode = copyNode->next; } RandomListNode* copyHead = pHead->next; RandomListNode* currentNode = pHead; RandomListNode* successor; while (currentNode->next) { successor = currentNode->next; currentNode->next = successor->next; currentNode = successor; } return copyHead; } };