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)
解体思路
1.在每个结点的后面插入复制的结点 2.对复制结点的random链接进行赋值 3.拆分
代码实现:
/*
public class RandomListNode {
int label;
RandomListNode next = null;
RandomListNode random = null;
RandomListNode(int label) {
this.label = label;
}
}
*/
public class Solution {
public RandomListNode Clone(RandomListNode pHead)
{
if(pHead == null)
return null;
// 插入新节点
RandomListNode current = pHead;
while(current != null) {
RandomListNode clone = new RandomListNode(current.label);
clone.next = current.next;
current.next = clone;
current = clone.next;
}
// 建立Random链接
current = pHead;
while(current != null) {
RandomListNode clone = current.next;
if(current.random != null)
clone.random = current.random.next;
current = clone.next;
}
// 拆分
current = pHead;
RandomListNode pCloneHead = pHead.next;
while(current.next != null) {
RandomListNode next = current.next;
current.next = next.next;
current = next;
}
return pCloneHead;
}
}