题目:
Given a sorted linked list, delete all duplicates such that each element appear only once.
For example,
Given 1->1->2
, return 1->2
.
Given 1->1->2->3->3
, return 1->2->3
.
题意:
将链表里的具有相同值的节点去除。
代码:
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNode(int x) : val(x), next(NULL) {}
* };
*/
class Solution {
public:
ListNode* deleteDuplicates(ListNode* head) {
if(head == NULL || head->next == NULL)
return head;
ListNode *p = head, *q = head->next, *cur;
while(q != NULL)
{
cur = q->next;
if(p->val == q->val)
{
p->next = q->next;
delete q;
}
else
{
p = q;
}
q = cur;
}
return head;
}
};
一次AC^_______________________^