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Remove Duplicates from Sorted List
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
.
/**
* 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)
return head;
ListNode* p=head;
while(p!=NULL)
{
while(p->next!=NULL && p->next->val==p->val)
p->next=p->next->next;
p=p->next;
}
return head;
}
};
* 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)
return head;
ListNode* p=head;
while(p!=NULL)
{
while(p->next!=NULL && p->next->val==p->val)
p->next=p->next->next;
p=p->next;
}
return head;
}
};
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