AcWing 29. 删除链表中重复的节点
原题链接
中等
作者:
我要出去乱说
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2021-01-25 17:34:26
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所有人可见
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阅读 333
/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNode(int x) : val(x), next(NULL) {}
* };
*/
class Solution {
public:
ListNode* deleteDuplication(ListNode* head) {
auto dummy = new ListNode(-1);
dummy->next = head; //防止开头出现重复数字,头结点被删除的情况
auto p = dummy;
while (p->next)
{
auto q = p->next; //q是哨兵
while(q->next && q->next->val == p->next->val) q = q->next;
if (q == p->next) p = q;
else p->next = q->next;
}
return dummy->next;
}
};