Leetcode-83 Remove Duplicates from Sorted List
#83. 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) { ListNode* p=head; while(p!=NULL&&p->next!=NULL) { if(p->val==p->next->val) { p->next=p->next->next; } else p=p->next; } return head; } };